Photo taken on Oct. 31, 2019 shows a flock of Tibetan antelopes near Baiku Co (Baiku Lake), southwest China`s Tibet Autonomous Region. Baiku Co, with an elevation of 4,590 meters, is located on the border of Nyalam County and Jilong County. (Xinhua/Sun Fei)

Aerial photo taken on Oct. 31, 2019 shows the scenery of Baiku Co (Baiku Lake), southwest China`s Tibet Autonomous Region. Baiku Co, with an elevation of 4,590 meters, is located on the border of Nyalam County and Jilong County. (Xinhua/Wang Qinou)

Aerial photo taken on Oct. 31, 2019 shows the scenery of Baiku Co (Baiku Lake), southwest China`s Tibet Autonomous Region. Baiku Co, with an elevation of 4,590 meters, is located on the border of Nyalam County and Jilong County. (Xinhua/Wang Qinou)

Aerial photo taken on Oct. 31, 2019 shows the scenery of Baiku Co (Baiku Lake), southwest China`s Tibet Autonomous Region. Baiku Co, with an elevation of 4,590 meters, is located on the border of Nyalam County and Jilong County. (Xinhua/Sun Fei)

Photo taken on Oct. 31, 2019 shows the scenery of Baiku Co (Baiku Lake), southwest China`s Tibet Autonomous Region. Baiku Co, with an elevation of 4,590 meters, is located on the border of Nyalam County and Jilong County. (Xinhua/Sun Fei)

A bird is seen on Baiku Co (Baiku Lake), southwest China`s Tibet Autonomous Region, Oct. 31, 2019. Baiku Co, with an elevation of 4,590 meters, is located on the border of Nyalam County and Jilong County. (Xinhua/Sun Fei)