Aerial photo taken on July 30, 2019 shows the scenery at dusk of the ruins of the Guge Kingdom in Zanda County of Ngari Prefecture, southwest China's Tibet Autonomous Region. The ruins of the ancient Guge Kingdom features the unique landscape of "earth forest" and the brilliant Guge civilization. (Xinhua/Jigme Dorje)

Aerial photo taken on July 30, 2019 shows the river beside the ruins of the Guge Kingdom in Zanda County of Ngari Prefecture, southwest China's Tibet Autonomous Region. The ruins of the ancient Guge Kingdom features the unique landscape of "earth forest" and the brilliant Guge civilization. (Xinhua/Jigme Dorje)

Aerial photo taken on July 30, 2019 shows the scenery at dusk of the ruins of the Guge Kingdom in Zanda County of Ngari Prefecture, southwest China's Tibet Autonomous Region. The ruins of the ancient Guge Kingdom features the unique landscape of "earth forest" and the brilliant Guge civilization. (Xinhua/Jigme Dorje)

Aerial photo taken on July 30, 2019 shows the scenery at dusk of the ruins of the Guge Kingdom in Zanda County of Ngari Prefecture, southwest China's Tibet Autonomous Region. The ruins of the ancient Guge Kingdom features the unique landscape of "earth forest" and the brilliant Guge civilization. (Xinhua/Jigme Dorje)