Gem-like Qinghai Lake enters frozen period (1/7)

The surface of the Qinghai Lake is frozen. Known as "the saphire on the plateau" and China's largest salt-water lake, the lake looks like a gem embedded on the northeastern part of the Qinghai-Tibet Plateau in "Qinghai. (Photo: China News Service/Zhang Shiwei)

The surface of the Qinghai Lake is frozen. Known as "the saphire on the plateau" and China's largest salt-water lake, the lake looks like a gem embedded on the northeastern part of the Qinghai-Tibet Plateau in "Qinghai. (Photo: China News Service/Zhang Shiwei)

The surface of the Qinghai Lake is frozen. Known as "the saphire on the plateau" and China's largest salt-water lake, the lake looks like a gem embedded on the northeastern part of the Qinghai-Tibet Plateau in "Qinghai. (Photo: China News Service/Zhang Shiwei)

The surface of the Qinghai Lake is frozen. Known as "the saphire on the plateau" and China's largest salt-water lake, the lake looks like a gem embedded on the northeastern part of the Qinghai-Tibet Plateau in "Qinghai. (Photo: China News Service/Zhang Shiwei)

The surface of the Qinghai Lake is frozen. Known as "the saphire on the plateau" and China's largest salt-water lake, the lake looks like a gem embedded on the northeastern part of the Qinghai-Tibet Plateau in "Qinghai. (Photo: China News Service/Zhang Shiwei)

The surface of the Qinghai Lake is frozen. Known as "the saphire on the plateau" and China's largest salt-water lake, the lake looks like a gem embedded on the northeastern part of the Qinghai-Tibet Plateau in "Qinghai. (Photo: China News Service/Zhang Shiwei)

The surface of the Qinghai Lake is frozen. Known as "the saphire on the plateau" and China's largest salt-water lake, the lake looks like a gem embedded on the northeastern part of the Qinghai-Tibet Plateau in "Qinghai. (Photo: China News Service/Zhang Shiwei)