Tengchong Beihai Wetland Floating Matsc: The Volcanic Lake That Grows Its Own Islands

Tengchong Beihai Wetland floating mats are thick rafts of living sedge, iris and reed root that sit on the surface of a volcanic dammed lake in western Yunnan, up to two metres deep and firm enough for a person to stand on. They formed roughly 600,000 years ago when basalt lava from the Tengchong volcano field blocked a river valley, and the ash that settled on the still water gave marsh plants a place to take root.

The result is a landscape that behaves unlike any ordinary lake, and the Tengchong Beihai Wetland floating mats are the reason why. Around the shoreline, these floating mats grow outward from the bank in a semi-peat mat twenty to fifty centimetres thick, and in places the accumulated root mass reaches two metres. Beihai is the only volcanic dammed lake marsh of its kind in southwest China, which is why the provincial reserve that protects it covers 1,629 hectares of open water, marsh and surrounding hill at an elevation of about 1,731 metres.

This guide explains what a Tengchong Beihai Wetland floating mat is made of, how the lake fits into the wider Tengchong volcanic landscape, and what changes on the water between the purple iris of April and the winter cranes of December. It also covers what you can realistically do in half a day, and how to read the reserve boundary before you book a boat.

What Tengchong Beihai Wetland Floating Mats Actually Are

The short answer is that a Tengchong Beihai Wetland floating mat is neither a plant nor an island. It is a slow-motion structure built by plants over tens of thousands of years, and the process is still running. Beihai is a shallow, nutrient-poor basin fed by springs and seasonal rain, and in that setting dead plant material does not fully decompose. Stems, leaves and rhizomes pile up underwater faster than bacteria can break them down, and that surplus is the raw material of every Tengchong Beihai Wetland floating mat, so a layer of semi-peat accumulates.

New plants then colonise the top of the young Tengchong Beihai Wetland floating mat. The roots of a growing Tengchong Beihai Wetland floating mat knit sideways into the old material and into each other, and the whole assembly starts to lift. Buoyancy in a Tengchong Beihai Wetland floating mat comes from trapped gas and from the low density of the fibrous mass, and once the raft is thick enough it detaches from the bottom entirely and drifts. At that moment the surface becomes a vessel rather than a substrate.

The thickness range matters more than any single figure. Measurements taken on a Tengchong Beihai Wetland floating mat give a typical figure of twenty to fifty centimetres for the semi-peat mat, with the deepest sections reaching two metres. Two metres of fibrous root mass in a Tengchong Beihai Wetland floating mat holds enough air and structure to carry a human being, which is why local people have stood on these surfaces for generations rather than swimming.

Why the Volcanic Origin Is the Whole Story

Plenty of lakes in China have marsh fringes, but only a handful carry a Tengchong Beihai Wetland floating mat. Very few have this one, because the starting conditions were unusual. Around 600,000 years ago, lava flows from the Tengchong volcanic field poured into the valley of the Daying River and sealed it. Water backed up behind the barrier, and a lake formed in a basin with no natural outlet to the sea nearby and very little sediment input.

Volcanic ash falling onto that young lake surface supplied fine mineral particles and phosphate in a slow, even trickle. Rather than a single flood of nutrients that would have produced algae and murky water and smothered a young Tengchong Beihai Wetland floating mat, the ash delivered a steady background supply. Marsh plants arrived by wind and by bird, found a mineral substrate with no competing forest, and began building the Tengchong Beihai Wetland floating mats through the cycle of growth, death and re-growth that still runs today.

There is a second volcanic feature alongside the Tengchong Beihai Wetland floating mats, and it gets far less attention. Qinghai, a small crater lake east of Beihai, is slightly acidic, and it is one of only three acidic lakes recorded worldwide. The reserve was designed around both, which is why its formal protection target is described as the volcanic dammed lake and the crater lake together rather than the marsh alone.

Sediment cores taken from beneath a Tengchong Beihai Wetland floating mat have pushed the record back roughly 53,000 years within the longer history of the basin, and the shifts visible in those cores track the monsoon rainfall that has fed the Tengchong Beihai Wetland floating mats for millennia, rather than local events. A Tengchong Beihai Wetland floating mat is therefore not just a curiosity on the water today. It is the visible top layer of a climate archive that researchers are still reading.

Reading the Surface Like a Local

Anyone who grew up beside the lake reads a Tengchong Beihai Wetland floating mat by texture rather than by map. Dense, pale-green mats with tight sedge growth and few gaps are the firm ones. Mats carrying tall iris or with dark water showing through in patches are thinner and should not be stepped on. Water depth beneath a Tengchong Beihai Wetland floating mat is usually shallow, but a two-metre-thick raft can sit over deeper water than visitors expect, and stepping off the edge is how most accidents here would begin.

Colour on a Tengchong Beihai Wetland floating mat is the second signal. A Tengchong Beihai Wetland floating mat that has gone yellow-brown across its whole surface is seasonal dieback and is structurally weaker than it looks from a distance. A mat that carries a visible fringe of pale new rhizomes along its edge while the crown stays green is expanding quickly, which is what you want to see if you are trying to understand how fast the wetland is filling in.

The water chemistry that sustains the Tengchong Beihai Wetland floating mats is mildly acidic, with readings around pH 6.8 reported for the Beihai water body. That figure is not a detail for chemists. Slightly acid, low-nutrient water suppresses the fast-growing algae that would cloud the lake, and it favours the slow fibrous sedges that build mats instead. Change the pH and you change whether a Tengchong Beihai Wetland floating mat keeps forming at all.

How the Floating Mats Fit the Wider Volcanic Lake Landscape

Beihai is the lowest and wettest of several features produced by the Tengchong volcano field, and it only makes sense next to them. The same volcanic system that dammed the valley also created the hot springs of Rehai and the cones around Mazhan and Hesong, all within a short drive of the wetland. Travellers who visit the Tengchong Beihai Wetland floating mats in isolation see a pretty lake, which is exactly the reading that human-designed travel is meant to correct. Travellers who visit it after the craters see a system.

That system, which ends in the Tengchong Beihai Wetland floating mats, has a clear vertical logic. Volcanic heat still drives steam and hot water to the surface at Rehai, roughly nineteen kilometres south. Cooler springs feed the marsh from the hills around Beihai. Rain falling on the surrounding slopes moves through the same fractured basalt, and the marsh sits at the bottom of that plumbing as the place where water slows down, spreads out and stays.

The reserve's own geography reflects this. Its 1,629 hectares split into a core zone of about 384.5 hectares, a buffer zone of 236.4 hectares and an experimental zone of 1,008.1 hectares, with the open wetland covering roughly 215.7 hectares within that. The floating mats are concentrated along the lake shore and in the shallow bays, which is exactly where groundwater discharge is slowest and where the water stays calm enough for a Tengchong Beihai Wetland floating mat to hold together.

Why the Mats Do Not Form Everywhere on the Lake

Walk the boardwalk and you will notice that the Tengchong Beihai Wetland floating mats cluster. They do not cover the whole water surface, and the reason is mechanical. Mats need three conditions at once: shallow depth, low wave energy and a supply of sediment-free water. Wind-driven waves break a young Tengchong Beihai Wetland floating mat apart before its roots have interlocked, so the exposed middle of the lake stays open water.

That is also why the western and northern shorelines carry more mats than the open east. The surrounding hills cut the prevailing wind across the bays that carry the Tengchong Beihai Wetland floating mats, and spring discharge keeps the water level stable enough that a mat is not repeatedly stranded and flooded. Where the shoreline has been straightened or drained in the past, mats have not returned on their own.

Human history sits on top of this. For generations, families living beside the lake cut a Tengchong Beihai Wetland floating mat into sections, poled them like rafts and fished from them. That practice is now prohibited inside the core zone, because removing a Tengchong Beihai Wetland floating mat removes decades of accumulated growth at once. The old technique survives only as a supervised visitor activity using cultivated sections, which is the compromise the reserve settled on in order to keep the memory without repeating the damage.

The Restoration Story That Made the Mats Visible Again

The Tengchong Beihai Wetland floating mats almost disappeared, and the recovery is recent enough to be documented in detail. By the 1960s, draining and farming around the lake had cut the wetland from a recorded high of about 5,000 mu down to roughly 810 mu. Sediment built up, the water body shrank, and the sedge communities that build a Tengchong Beihai Wetland floating mat were reduced to fragments.

Protection of the Tengchong Beihai Wetland floating mats began with a county-level reserve in 2000 and a provincial upgrade in 2005. From 2010 the city ran a wetland restoration programme that raised water levels behind low embankments, replanted native species and converted farmland back to marsh across about 2,650 mu. Wetland area recovered from roughly 807 mu to more than 3,400 mu. In 2020 alone, more than 3,000 mu of invasive water hyacinth and parrot feather were cleared by hand.

Ecological recovery of the Tengchong Beihai Wetland floating mats followed the physical work. Waterbird counts rose from 343 individuals of 11 species in a 2016 synchronised survey to 2,650 individuals of 56 species by 2021, and in that year observers recorded red-crested pochard, bar-headed goose and the critically endangered Baer's pochard for the first time. The wild population of water shield, a national second-class protected plant, expanded from three mu to about 860 mu. More Tengchong Beihai Wetland floating mats, more open water and more birds turned out to be the same outcome.

The staff who run the reserve talk about it in terms of patience rather than engineering. Zhang Wei, deputy director of the Beihai Wetland Provincial Nature Reserve management bureau, framed the work bluntly when she said, "We are not just protecting a piece of wetland, we are protecting the spirit of the plateau." In 2018 the bureau also introduced a shoreline lease model, renting farmland from villagers at 200 yuan per mu per year so that households gained directly from land they had previously been farming.

The Wetland Through the Seasons: What Changes and When

Beihai has no single best month. It has four clearly different ones, and a Tengchong Beihai Wetland floating mat looks like a different object in each of them. Choosing a season is really choosing which version of the lake you want to photograph. The table below sets out the sequence before the detail.

Season	Months	What the mats look like	Wildlife and colour
Late spring	April to May	Fresh green regrowth, purple iris breaking through the raft surface	Iris beds across the marsh; waterbirds dispersing to breeding grounds
Summer	June to August	Fullest green cover of the year, rafts at their most solid	Creamy white water lilies; herons and egrets nesting in the fringe
Autumn	September to November	Swaths of gold and russet as sedges and reeds die back	Reed and wild rice stems in seed; peak landscape photography window
Winter	December to March	Mats flatten and brown; dead growth forms standing structure	Cranes, ducks and geese on the open water; the reserve's bird season

Late Spring: The Iris Window

From about the middle of April the marsh turns violet, and this is the season most visitors are quietly aiming for. Purple iris comes up through the mat surface in dense bands, and because each Tengchong Beihai Wetland floating mat is still firm from the previous season's growth you can see the flowers sitting directly on what looks like open water. Late spring is also when the water beneath a Tengchong Beihai Wetland floating mat is clearest, before summer rain brings silt down from the surrounding slopes.

Photography in this window is straightforward and forgiving. Morning mist off the lake lifts within an hour of sunrise, and the low angle of spring light picks out the texture along a Tengchong Beihai Wetland floating mat edge where new rhizomes push over the old material. The practical constraint is wind: by late morning the surface ruffles and the reflections that make a Tengchong Beihai Wetland floating mat photograph work simply vanish.

Summer: Peak Growth and Peak Rain

Between June and August the wetland is at maximum productivity. Sedges, reeds and wild rice grow fast in warm water, and each Tengchong Beihai Wetland floating mat thickens, and the lake carries the deepest green of the year. Creamy white water lilies open across the shallows, and the fringe of the marsh becomes a nesting area for herons, egrets and moorhens. This is also the rainy season, and Yunnan's summer rainfall arrives as short heavy afternoon downpours rather than all-day drizzle.

That pattern is workable. Plan boat and boardwalk time for the morning and treat the afternoon as the buffer. Water levels rise in July and August, which lifts each Tengchong Beihai Wetland floating mat slightly and makes its edges harder to see from the boardwalk, but it also makes the boat channels through the marsh more interesting because the vegetation closes in from both sides.

Autumn: The Best Overall Window

September to November is the most reliable stretch of the year for a first visit. The rains end, skies clear, and the Tengchong Beihai Wetland floating mats turn from green through gold to deep russet as sedge and reed growth dies back. Because the dead stems stay standing through the autumn, a Tengchong Beihai Wetland floating mat holds its structure and its colour simultaneously, which is what makes the season so photogenic.

Autumn is also when the landscape around the Tengchong Beihai Wetland floating mats peaks, with ginkgo turning in Guyandong village and the volcanic hills behind the wetland going brown and gold. The combination of an hour at the marsh and an afternoon at the ginkgo village is the most common half-day pairing that travel designers put together in this part of the prefecture. Travellers who plan this way are reading the wetland as part of a volcanic system rather than as a standalone lake, and the half-day pairing reflects it.

Winter: The Bird Season

From December the Tengchong Beihai Wetland floating mats brown over and flatten, and the wetland changes function. Beihai sits on a north-south migratory route used by birds moving between northern Asia and Southeast Asia, and the lake becomes a staging and refuelling stop. Open water kept clear of ice by the mild Yunnan winter is the attraction, and the standing dead vegetation on a Tengchong Beihai Wetland floating mat provides cover.

Species recorded across recent winters include common crane, black stork, black-necked bar-tailed pheasant, greater spotted eagle and Baer's pochard. The reserve also recorded the red-crested pochard and bar-headed goose for the first time in 2021. Purple gallinule, a resident species, has grown at an estimated 20 to 30 percent per year, which is a useful indicator that foraging habitat on and around the Tengchong Beihai Wetland floating mats is holding up.

Early morning is the productive window and the reason to stay overnight in Tengchong rather than passing through. Birds are on the open water at first light and move into cover as the day warms. A scope or a 400 mm equivalent lens is genuinely useful here; phone cameras will record the scene but not the species.

One caution applies to every season and to every Tengchong Beihai Wetland floating mat. The Tengchong Beihai Wetland floating mats inside the core zone are closed to visitors, and the boundary is marked by a line of floating buoys across the water. Boats and boardwalks stay in the experimental zone by design. A Tengchong Beihai Wetland floating mat that looks firm and inviting from a boat deck may be a protected breeding surface, and the buoy line is not advisory.

What Visitors Can Actually Do on and Around the Mats

The experience built around the Tengchong Beihai Wetland floating mats covers four activities, and the order in which you do them determines how much you enjoy the day. The boardwalk gives you the overview. A boat or bamboo raft takes you into the channels. The mat walk, where it is operating, gives you the one physical sensation that no photograph conveys. Everything else, including the traditional net-fishing demonstration and the papermaking workshop on shore, fills the remaining time.

Walking on a Floating Mat

Standing on a Tengchong Beihai Wetland floating mat feels like standing on a very thick, slightly unstable mattress over water. The surface of a Tengchong Beihai Wetland floating mat gives by a few centimetres under your weight, and the whole raft responds as a single sheet, which is disconcerting for about four seconds and then strangely pleasant. Because the classic Tengchong Beihai Wetland floating mat walk is a managed activity using cultivated sections rather than wild rafts, it is supervised and usually has a fixed route.

Wear flat shoes with some grip and expect to hand over your bag. Anything loose will fall into water you cannot recover it from. The activity is seasonal and can be closed after heavy rain, so treat it as a possibility rather than a guarantee and confirm on the day you arrive.

Boats, Bamboo Rafts and the Channel Network

A boat trip runs through open channels between mat fields and takes roughly forty to sixty minutes depending on the route and the season. Seen from the water, a Tengchong Beihai Wetland floating mat reads as an individual raft separated from its neighbours by narrow lanes of open water, a pattern that is impossible to pick out from the shore.

Bamboo rafts glide past a Tengchong Beihai Wetland floating mat more slowly, more quietly and lower to the water, which matters if you are trying to watch birds or photograph the raft edges at eye level. Kayaks and pedal boats are also available inside the experimental zone. Anyone who prefers to stay dry can cover the lake on the ring boardwalk and the elevated viewing platforms, which is the most accessible option for families with small children or travellers with limited mobility.

Traditional Net Fishing and Crafts on Shore

The old fishing method used beside a Tengchong Beihai Wetland floating mat, in which a heavy conical net is pushed down through the shallow water to trap fish, is demonstrated as a supervised activity rather than practised commercially. It is a useful reminder that the wetland was a working food landscape before it was a scenic one, and children generally find it the most engaging part of the visit.

On the shore side, a papermaking workshop lets visitors make a sheet from Tengchong's traditional handmade paper, a craft with a much longer documented history than the reserve itself. Combined with an interpreter character dressed as the Ming dynasty traveller Xu Xiake, who recorded the marsh when he passed through in 1639, these activities give the site a cultural layer that the wetland alone would not supply.

Practical Notes on Time, Cost and Access

Entry to the scenic area is around 55 yuan for a standard ticket, and combination tickets covering boat, raft, mat walk and shuttle bus run from about 110 yuan to about 168 yuan depending on what is included. Opening hours are roughly 08:30 to 18:00, with seasonal variation. Allow two to three hours on site for the boardwalk, one water activity and a slow loop back, which is how human-designed travel schedules this stop rather than rushing it.

The Tengchong Beihai Wetland floating mats sit about twelve kilometres northeast of the city. Local bus 13 reaches the wetland stop, taxis and ride-hailing take twenty to thirty minutes, and self-driving follows provincial road S238. Most travellers combine it with Rehai hot springs or the Heshun old town, and the most comfortable plan is to base yourself in Tengchong for two nights rather than day-tripping from Baoshan.

The reserve that holds the Tengchong Beihai Wetland floating mats receives roughly 600,000 visitors a year and generates more than 60 million yuan in tourism revenue, which is why management is careful about capacity. Community income around the wetland has risen on the back of that traffic, with average household income in nearby villages reaching about 15,000 yuan a year by 2020, roughly 4.5 times the level of 2010. Visitors who understand that the marsh is a working conservation project as well as a scenic spot tend to have a better experience of it.

Wildlife and Plants You Can Reasonably Hope to See

The species list for the Tengchong Beihai Wetland floating mats is longer than most visitors expect from a lake this size. Surveys have recorded 233 plant species and 283 animal species in the reserve, including 159 wetland vascular plants across 52 families, with 202 bird species recorded in the most comprehensive bird survey. Six species carry national first-class protection status, including golden eagle, black stork, black-necked bar-tailed pheasant, pangolin, river tern and Baer's pochard.

The plant that matters most to the reserve's identity is water shield, known in Chinese as chuncai. It is a national second-class protected species, and Beihai together with the surrounding area is the only natural distribution site in southwest China for both it and a narrow-range endemic relative. Its recovery from three mu to roughly 860 mu of distribution is the single clearest number in the reserve's restoration record.

Other protected plants rooted on or near a Tengchong Beihai Wetland floating mat include dawn redwood, wild water chestnut and, on the submerged flanks of the mats, ottelia and the delicate orchids that appear in the fringe vegetation. Seven national second-class protected plant species have been recorded within the wetland itself, and the vegetation that covers a Tengchong Beihai Wetland floating mat separates into nine recognisable communities, among them iris, mat sedge and bogbean types.

The Bird List in Practice

Anyone visiting for wildlife should focus on the winter months and on the open water rather than the mats themselves. The synchronised count of 2,650 individuals across 56 species in 2021 is the benchmark figure, up from 343 individuals of 11 species in 2016, and the trend has continued. The 2021 records of red-crested pochard and bar-headed goose were the first for the site.

The reliable residents are purple gallinule, little grebe, common moorhen and several heron species, all of which forage in the shallow lanes beside a Tengchong Beihai Wetland floating mat and are visible from the boardwalk at close range. Purple gallinule has been growing at 20 to 30 percent annually, and it is now one of the easiest protected birds to watch over a Tengchong Beihai Wetland floating mat because the reserve's shallow foraging habitat suits it so well.

The winter migrants are the draw for photographers. Common crane, greylag and bar-headed geese, red-crested pochard and Baer's pochard all use the lake, and black stork has been recorded repeatedly. Baer's pochard is critically endangered globally, and its continued presence across three consecutive winters from 2021 is one of the reserve's strongest conservation results.

Reptiles, Amphibians and the Fish Recovery

The register for a Tengchong Beihai Wetland floating mat also covers twenty-five mammal species, seventeen amphibians and twenty-three reptiles, among them the red knobbed newt and fifteen other national second-class protected species. Chinese pangolin has been recorded in the reserve, though sightings by visitors are effectively impossible given its nocturnal and burrowing habits.

Fish are a quieter success story. Species counts in the water beneath the Tengchong Beihai Wetland floating mats recovered from six species recorded in 2008 to twelve or thirteen in recent surveys, which matters because fish are the middle of the food chain that supports the wintering birds. A Tengchong Beihai Wetland floating mat contributes directly to that recovery by shading shallow water, stabilising temperature and providing spawning cover along its submerged rim.

Two pressures continue. Nutrient indicators including total phosphorus and total nitrogen have been rising in the water beneath the Tengchong Beihai Wetland floating mats, and the reserve has repeatedly had to clear invasive water hyacinth and parrot feather out of a Tengchong Beihai Wetland floating mat. Both problems come from outside the reserve boundary, which is the recurring lesson in wetlands of this kind: you can manage the lake, but you have to manage the catchment as well.

How to Plan a Visit Around the Wetland

The Tengchong Beihai Wetland floating mats work as a half-day stop or as the centre of a two-day Tengchong itinerary, and the choice depends on whether you are travelling for landscape or for wildlife. Landscape travellers drawn by the Tengchong Beihai Wetland floating mats should aim for autumn or late spring and pair the marsh with Guyandong ginkgo village or Heshun old town. Wildlife travellers should come between December and February and plan two mornings on the water.

If you are here for	Best season	Time on site	Pair it with
Landscape photography	Late October to late November	3 to 4 hours, twice a day	Guyandong ginkgo village; Heshun old town at dusk
Wildflowers and colour	Mid April to mid May	2 to 3 hours, early morning	Rehai hot springs; volcanic crater park at Mazhan
Winter birdwatching	December to February	2 mornings, 2 hours each	Qinghai crater lake; Heshun wetlands walk
Family day out	June to August	3 to 4 hours, morning	Mat walk, net fishing demonstration, papermaking workshop

Where to Stay and How Long to Give It

Tengchong city and Heshun old town are the two sensible bases, both within half an hour of the wetland. Staying in Heshun keeps you within half an hour of the Tengchong Beihai Wetland floating mats and gives you an old town to walk in the evening, which is a better use of a two-night stay than a generic city hotel. Budget guesthouses start around 150 to 250 yuan a night, with well-restored courtyard properties in Heshun running considerably higher in peak season.

Two nights is the right allocation if you want to read the Tengchong Beihai Wetland floating mats properly, and it is the minimum a human-designed travel plan should allow here. That gives you one full day for the wetland plus Rehai, and one day for Heshun, the volcanic crater park and the war memorial museum. Travellers trying to cover Tengchong in a single day usually end up seeing the wetland from a moving vehicle, which defeats the purpose of coming this far west.

Reading the Wider Tengchong Context

Tengchong is one of the more travelled corners of Yunnan now, and the numbers show it. The city received 1.8336 million visitors and generated 1.764 billion yuan in tourism spending during the 2026 Spring Festival holiday, up 36.9 percent and 49.45 percent respectively on a comparable basis, with 49 A-level scenic areas across the city handling 1.2988 million visits over the same period. In the first quarter of 2026 the city recorded 6.627 million visits and 7.43 billion yuan in spending.

The implication for human-designed travel planning is straightforward: book accommodation and transport early for national holidays, and go to the Tengchong Beihai Wetland floating mats at opening time rather than mid-morning. Rehai received 129,163 visitors during the 2026 Spring Festival alone, and the wetland is on the same coach loops. Arriving at 08:30 gives you most of the first hour on the boardwalk with very few other people.

Responsible Visiting, Concretely

Three rules cover almost everything, and they are the same rules any human-designed travel itinerary in Yunnan runs on. Stay on the boardwalk and inside the marked lanes between the Tengchong Beihai Wetland floating mats, because the buoy line marks the core zone boundary rather than a suggestion. Do not feed or approach birds near a Tengchong Beihai Wetland floating mat, particularly on the open water where wintering ducks need undisturbed feeding time. And do not remove plant material from the raft edges, even loose fragments, since the mass beneath a Tengchong Beihai Wetland floating mat took decades to build and cannot be replaced within a human lifetime.

The Tengchong Beihai Wetland floating mats also sit inside a broader travel pattern that human-designed travel operators have had to adapt to, because that pattern has shifted noticeably in recent years. Yunnan recorded 990,000 inbound foreign visitors in 2026 up to the start of August, of whom 819,700 arrived visa-free, and Yunnan's July average temperature of 21.9 degrees Celsius has made cool-season destinations here appeal to travellers in a way that was not true a decade ago. Tengchong, with its volcanic landscape, mild winter and border-province setting, benefits directly from that shift.

Frequently Asked Questions

Q1. Can I actually walk on the floating mats at Beihai?

Yes, but only on the managed cultivated sections inside the scenic area, as a supervised activity with a guide. A wild Tengchong Beihai Wetland floating mat sits inside the reserve core zone and is closed to visitors. The classic wild-mat walk that older accounts describe ended when restoration began, and what remains is a curated version designed to give the same sensation without damaging a raft that took decades to form.

Q2. How thick are the mats, and what makes them float?

Typical thickness for a Tengchong Beihai Wetland floating mat is twenty to fifty centimetres, with the deepest sections reaching about two metres. Buoyancy comes from the fibrous, low-density structure of accumulated rhizomes and trapped gas. The material is a semi-peat rather than true soil, and it stays rigid enough to carry a person because the roots interlock horizontally as well as vertically.

Q3. What exactly created the lake?

A lava flow from the Tengchong volcano field blocked the valley of the Daying River about 600,000 years ago, and water backed up behind the natural barrier. Volcanic ash settling on the still surface supplied a slow, steady mineral input, which allowed marsh plants to establish and eventually build the Tengchong Beihai Wetland floating mats. The reserve also takes in Qinghai, a crater lake whose water is mildly acidic, a chemistry recorded at very few sites on earth.

Q4. When is the best time to see the mats at their most photogenic?

Late October to late November gives the strongest combination of colour, clear air and stable weather, with sedges and reeds in gold and russet and the raft structure still intact. Mid April to mid May is the alternative if you want the purple iris display. Winter is better for birds than for landscape, and summer is greener but wetter.

Q5. Do I need a boat ticket, or is the boardwalk enough?

The boardwalk alone is enough to understand how a Tengchong Beihai Wetland floating mat sits in the lake, and it is the most accessible option. Going afloat is what shows you the gaps: narrow channels of clear water separate one raft from the next, a pattern you simply cannot pick out from land. Boat, raft, mat walk and shuttle are sold as bundles priced between roughly 110 and 168 yuan, on top of the basic 55 yuan entrance.

Q6. How far is it from Tengchong city, and how do I get there?

Here the rafts lie roughly twelve kilometres northeast of the city. Bus 13 runs to the wetland stop, a taxi or ride-hail takes half an hour at most, and drivers follow provincial road S238. Gates are open about 08:30 to 18:00, shifting a little with the season, and two to three hours on site is a comfortable allowance.

Q7. Which birds might I see in winter?

The winter roster runs from common crane to the critically endangered Baer's pochard, with a wide spread of waterfowl and diving ducks in between. Counts over the Tengchong Beihai Wetland floating mats rose from 343 individuals of 11 species in 2016 to 2,650 individuals of 56 species by 2021. Purple gallinule is resident, increasing by 20 to 30 percent a year, and is among the easiest protected birds to observe here.

Q8. Is the wetland suitable for children or older travellers?

Yes. The ring boardwalk through the Tengchong Beihai Wetland floating mats is level and shaded, and the whole loop can be walked at an unhurried pace. The traditional net fishing demonstration is the activity children tend to remember most. The mat walk requires reasonable balance and flat-soled shoes, so it is optional rather than essential for a family visit.

Q9. Why is part of the lake closed off?

The buoy line marks the boundary of the reserve core zone, which carries the densest Tengchong Beihai Wetland floating mat cover, the main water shield beds and the principal bird roosting areas. Restoration raised wetland area from about 807 mu to more than 3,400 mu and expanded water shield distribution from three mu to roughly 860 mu, and that recovery depends on keeping people out of the most sensitive sections.

Q10. How has the site changed in recent decades?

Draining and farming cut the wetland to roughly 810 mu by the 1960s. A county reserve followed in 2000, a provincial upgrade in 2005, and from 2010 a restoration programme converted about 2,650 mu of farmland back to marsh. Wetland area supporting the Tengchong Beihai Wetland floating mats has since recovered to more than 3,400 mu, fish species increased from six in 2008 to twelve or thirteen, and the reserve now receives about 600,000 visitors a year.

What makes Beihai worth the detour is not the scenery alone but the fact that every Tengchong Beihai Wetland floating mat is doing something, which is the whole premise of human-designed travel. A Tengchong Beihai Wetland floating mat is a structure under construction in real time, growing outward from the bank at a rate no visitor can see and a pace that has already filled a fifth of a lake over sixty thousand years.

That is also why the reserve boundary exists and why the round of restoration that rebuilt the Tengchong Beihai Wetland floating mats after 2010 matters more than any viewpoint, and why human-designed travel here means working with that boundary rather than around it. Water shield went from three mu to 860, wetland area from 807 mu to more than 3,400, and waterbirds from 343 individuals to 2,650. Those numbers are the reason a visitor in late October can watch a floating raft of living sedge while a Baer's pochard feeds thirty metres away.

Go early, go in the shoulder seasons if you can, and treat the buoy line as the edge of a working conservation project rather than an inconvenience. Teams designing human-designed travel itineraries through this part of Baoshan, including Kiki Holidays, generally build the wetland in as a slow morning rather than a stop, which is what human-designed travel looks like on the ground, because the site rewards patience and punishes hurry.

Sources and Fact-Check Trail

- Yunnan Tengchong Beihai Wetland Provincial Nature Reserve management bureau; reserve boundary and zoning figures (core 384.5 ha, buffer 236.4 ha, experimental 1,008.1 ha; total 1,629 ha; wetland area 215.69 ha).

- Yunnan Forestry magazine, 2026 issue 02 (no. 309), feature on Beihai Wetland restoration; water area growth from 807 mu to 3,400 mu, 2,650 mu of degraded wetland restored, and quoted remarks by Zhang Wei, deputy director of the reserve management bureau ("We are not just protecting a piece of wetland, we are protecting the spirit of the plateau").

- China News Service, 7 October 2021, report on ten years of ecological restoration at Beihai Wetland; water shield distribution from 3 mu to 860 mu, waterbird counts from 343 individuals of 11 species (2016) to 2,650 individuals of 56 species (2021), 233 plant and 283 animal species, community income of about 15,000 yuan per person by 2020, and quoted remarks by boatman Chai Jiazhang on the end of traditional mat use.

- Yunnan Net (Baoshan channel), 9 October 2021, COP15 media coverage of Beihai Wetland; reserve zoning, wetland area of 215.69 ha, mat thickness of 20 to 50 cm reaching 2 m, and the reserve's description as the only natural distribution site in southwest China for water shield and a narrow-range endemic relative.

- Kunming Information Port, 4 October 2021, COP15 feature on Beihai Wetland; first-time records of red-crested pochard, bar-headed goose and Baer's pochard in 2021, purple gallinule population growth of 20 to 30 percent per year, and fish species recovery from six (2008) to twelve or thirteen.

- Baidu Baike entries on Yunnan Tengchong Beihai Wetland Provincial Nature Reserve and on the local term cao pai (grass raft); reserve approval history (county-level 2000, provincial 2005, Yunnan first batch of provincial important wetlands 2016), national important wetland listing 1994, national first-class and second-class protected species lists, pH of about 6.8, and inclusion in the first national list of important habitats for terrestrial wildlife (November 2023).

- Sina News report on CCTV-13 coverage of Beihai Wetland; end of traditional mat-cutting as a production method, replacement with cultivated mats for visitor experiences, and scenic-area ticket price of 55 yuan.

- Ctrip and Tongcheng scenic-area listings for Beihai Wetland; combination ticket tiers from approximately 110 yuan to 168 yuan, standard adult fare of about 55 yuan, and opening hours of 08:30 to 18:00 (subject to seasonal adjustment).

- People's Daily client and Yunnan Net, February 2026; Tengchong Spring Festival 2026 figures of 1.8336 million visitors and 1.764 billion yuan in tourism spending, up 36.9 percent and 49.45 percent on a comparable basis, with 49 A-level scenic areas recording 1.2988 million visits.

- Tengchong Municipal People's Government, Q1 2026 economic indicators; 6.627 million visitor arrivals and 7.43 billion yuan in tourism spending for January to March 2026.

- Yunnan provincial inbound tourism data for 2026 to 1 August: 990,000 inbound foreign visitors and 819,700 visa-free arrivals; July provincial average temperature of 21.9 degrees Celsius.

- Xu Xiake, Diyou Riji (Travel Diaries), 1639, description of the Beihai marsh recorded during his passage through Tengchong.