Scenery of frozen Qinghai Lake

Aerial photo taken on Jan. 16, 2019 shows the frozen Qinghai Lake, China's largest inland saltwater lake, in northwest China's Qinghai Province.

Aerial photo taken on Jan. 16, 2019 shows the frozen Qinghai Lake, China's largest inland saltwater lake, in northwest China's Qinghai Province.

Aerial photo taken on Jan. 16, 2019 shows the frozen Qinghai Lake, China's largest inland saltwater lake, in northwest China's Qinghai Province.

Aerial photo taken on Jan. 16, 2019 shows the frozen Qinghai Lake, China's largest inland saltwater lake, in northwest China's Qinghai Province.

Aerial photo taken on Jan. 16, 2019 shows the frozen Qinghai Lake, China's largest inland saltwater lake, in northwest China's Qinghai Province.

Aerial photo taken on Jan. 16, 2019 shows the frozen Qinghai Lake, China's largest inland saltwater lake, in northwest China's Qinghai Province.

Aerial photo taken on Jan. 16, 2019 shows the frozen Qinghai Lake, China's largest inland saltwater lake, in northwest China's Qinghai Province.

Aerial photo taken on Jan. 16, 2019 shows the frozen Qinghai Lake, China's largest inland saltwater lake, in northwest China's Qinghai Province.