A place shaped by time

Decades to flower

That slow rhythm is written into the very biology of this place.

A short walk from the main trail, Wei Jiansheng, an executive with the park's operating company, stops beside a cluster of green leaves.

"This is shuihuang, or Rheum alexandrae," he says.

Wei visits the park regularly to oversee operations, safety and conservation. He speaks about the plants here the way someone might speak about old friends.

"Most of its life — 30 years, sometimes 35 — it does nothing but grow ground-level leaves," he says. "Then, in its final year, it puts everything into one flower stalk."

He describes how the plant's translucent bracts wrap around the flowering stem like a greenhouse, trapping heat and blocking UV radiation in the harsh alpine environment.

"One bloom after decades of waiting. It teaches you that some things are worth waiting for," he says.

Potatso covers more than 600 square kilometers and contains a range of ecosystems, including forests, lakes, wetlands, meadows and snowcapped peaks. Its elevation ranges from 2,300 to 4,670 meters, creating a natural laboratory where scientists monitor water, air, soil and wildlife around the clock.

One of the clearest signs of the forest's health hangs from the branches above.

Wang points to pale gray-green lichen draping from spruce and fir trees.

"We call it 'tree beard'," she says. "It only grows where the air is clean. Scientists use it as an indicator of environmental conditions."

The park is home to a wide range of wildlife, including black-necked cranes, clouded leopards and red pandas. The most visible residents, however, are often the small squirrels darting across the boardwalks.

"Don't feed them," Wang reminds her visitors. "They are wild animals and need to forage naturally. If they become dependent on human food, they may lose their ability to survive on their own."