Tibetannet

A wolf is pictured at the Qiangtang National Nature Reserve in southwest China's Tibet Autonomous Region, Sept. 25, 2021. (Xinhua/Jigme Dorje)

A black-necked crane is pictured at the Qiangtang National Nature Reserve in southwest China's Tibet Autonomous Region, Sept. 26, 2021. (Xinhua/Purbu Zhaxi)

A herd of Tibetan gazelles are pictured at the Qiangtang National Nature Reserve in southwest China's Tibet Autonomous Region, Sept. 25, 2021. (Xinhua/Jigme Dorje)

Tibetan antelopes are pictured at the Qiangtang National Nature Reserve in southwest China's Tibet Autonomous Region, Sept. 25, 2021. (Xinhua/Sun Ruibo)

A wild yak is pictured at the Qiangtang National Nature Reserve in southwest China's Tibet Autonomous Region, Sept. 25, 2021. (Xinhua/Purbu Zhaxi)

A wild Tibetan donkey is pictured at the Qiangtang National Nature Reserve in southwest China's Tibet Autonomous Region, Sept. 25, 2021. (Xinhua/Purbu Zhaxi)

A Tibetan antelope is pictured at the Qiangtang National Nature Reserve in southwest China's Tibet Autonomous Region, Sept. 25, 2021. (Xinhua/Jigme Dorje)

A Tibetan fox is pictured at the Qiangtang National Nature Reserve in southwest China's Tibet Autonomous Region, Sept. 25, 2021. (Xinhua/Purbu Zhaxi)

Birds are pictured at the Qiangtang National Nature Reserve in southwest China's Tibet Autonomous Region, Sept. 26, 2021. (Xinhua/Jigme Dorje)

Plateau pikas are seen at the Qiangtang National Nature Reserve in southwest China's Tibet Autonomous Region, Sept. 26, 2021. (Xinhua/Jigme Dorje)

A Tibetan blue bear is pictured at the Qiangtang National Nature Reserve in southwest China's Tibet Autonomous Region, July 17, 2020. (Xinhua/Chogo)

Blue sheep are pictured at the Qiangtang National Nature Reserve in southwest China's Tibet Autonomous Region, Sept. 26, 2021. (Xinhua/Purbu Zhaxi)

Black-necked cranes are pictured at the Qiangtang National Nature Reserve in southwest China's Tibet Autonomous Region, Sept. 25, 2021. (Xinhua/Sun Ruibo)

Wild Tibetan donkeys are pictured at the Qiangtang National Nature Reserve in southwest China's Tibet Autonomous Region, Sept. 24, 2021. (Xinhua/Purbu Zhaxi)

Wild Tibetan donkeys are pictured at the Qiangtang National Nature Reserve in southwest China's Tibet Autonomous Region, Sept. 22, 2021. (Xinhua/Sun Ruibo)

Photo taken on Sept. 25, 2021 shows the Qiangtang National Nature Reserve in southwest China's Tibet Autonomous Region. (Xinhua/Sun Ruibo)

An eagle is pictured at the Qiangtang National Nature Reserve in southwest China's Tibet Autonomous Region, Sept. 25, 2021. (Xinhua/Jigme Dorje)