Photo taken on Dec. 16, 2020 shows scenery of Donggi Cona Lake in Tibetan Autonomous Prefecture of Golog, northwest China's Qinghai Province. (Photo by Song Zhongyong/Xinhua)

Photo taken on Dec. 16, 2020 shows scenery of Donggi Cona Lake in Tibetan Autonomous Prefecture of Golog, northwest China's Qinghai Province. (Photo by Song Zhongyong/Xinhua)

Photo taken on Dec. 16, 2020 shows scenery of Donggi Cona Lake in Tibetan Autonomous Prefecture of Golog, northwest China's Qinghai Province. (Photo by Song Zhongyong/Xinhua)

Photo taken on Dec. 16, 2020 shows scenery of Donggi Cona Lake in Tibetan Autonomous Prefecture of Golog, northwest China's Qinghai Province. (Photo by Song Zhongyong/Xinhua)

Photo taken on Dec. 16, 2020 shows scenery of Donggi Cona Lake in Tibetan Autonomous Prefecture of Golog, northwest China's Qinghai Province. (Photo by Song Zhongyong/Xinhua)

Photo taken on Dec. 16, 2020 shows scenery of Donggi Cona Lake in Tibetan Autonomous Prefecture of Golog, northwest China's Qinghai Province. (Photo by Song Zhongyong/Xinhua)