Przewalski's gazelles are seen on the grassland near Qinghai Lake in northwest China's Qinghai Province, Dec. 9, 2022. (Xinhua/Zhang Long)

Two brown-headed gulls are seen at Qinghai Lake in northwest China's Qinghai Province, Dec. 9, 2022. (Xinhua/Zhang Long)

Przewalski's gazelles are seen on the grassland near Qinghai Lake in northwest China's Qinghai Province, Dec. 9, 2022. (Xinhua/Zhang Long)

This aerial photo taken on Dec. 9, 2022 shows the scenery of Qinghai Lake in northwest China's Qinghai Province. (Xinhua/Zhang Long)

This aerial photo taken on Dec. 9, 2022 shows the scenery of Qinghai Lake in northwest China's Qinghai Province. (Xinhua/Zhang Long)

A brown-headed gull is seen at Qinghai Lake in northwest China's Qinghai Province, Dec. 9, 2022. (Xinhua/Zhang Long)

This aerial photo taken on Dec.9, 2022 shows the scenery of Qinghai Lake in northwest China's Qinghai Province. (Xinhua/Zhang Long)