Aerial photo taken on Jan. 10, 2021 shows the scenery of Yamzbog Yumco Lake in Shannan, southwest China's Tibet Autonomous Region. The population of wild animals that inhabit and breed by the lake increased year by year thanks to efforts of environmental protection. (Xinhua/Sun Fei)

Photo taken on Jan. 10, 2021 shows Tibetan gazelles by the Yamzbog Yumco Lake in Shannan, southwest China's Tibet Autonomous Region. The population of wild animals that inhabit and breed by the lake increased year by year thanks to efforts of environmental protection. (Xinhua/Sun Fei)

Photo taken on Jan. 10, 2021 shows Tibetan gazelles by the Yamzbog Yumco Lake in Shannan, southwest China's Tibet Autonomous Region. The population of wild animals that inhabit and breed by the lake increased year by year thanks to efforts of environmental protection. (Xinhua/Sun Fei)

Photo taken on Jan. 9, 2021 shows the scenery of Yamzbog Yumco Lake in Shannan, southwest China's Tibet Autonomous Region. The population of wild animals that inhabit and breed by the lake increased year by year thanks to efforts of environmental protection. (Xinhua/Sun Fei)

Photo taken on Jan. 9, 2021 shows the scenery of Yamzbog Yumco Lake in Shannan, southwest China's Tibet Autonomous Region. The population of wild animals that inhabit and breed by the lake increased year by year thanks to efforts of environmental protection. (Xinhua/Sun Fei)

Photo taken on Jan. 9, 2021 shows the scenery of Yamzbog Yumco Lake in Shannan, southwest China's Tibet Autonomous Region. The population of wild animals that inhabit and breed by the lake increased year by year thanks to efforts of environmental protection. (Xinhua/Sun Fei)