Scenery of Ngari area in China's Tibet（4）

Aerial photo taken on Sept. 11, 2018 shows the scenery of earth forest in Zanda County of Ngari, southwest China's Tibet Autonomous Region. The earth forest is the sediment stratum of rivers and lakes in ancient times, formed by erosion of water. The Ngari area has an average altitude of more than 4,000 metres. (Xinhua/Purbu Zhaxi)