Photo taken on Nov. 2, 2016 shows the autumn scenery of the Nanyigou scenic area in Nyingchi City, southwest China's Tibet Autonomous Region. (Xinhua/Zhang Rufeng)

Photo taken on Nov. 2, 2016 shows the autumn scenery in Nyingchi City, southwest China's Tibet Autonomous Region. (Xinhua/Zhang Rufeng)

Photo taken on Nov. 2, 2016 shows the autumn scenery of the Nanyigou scenic area in Nyingchi City, southwest China's Tibet Autonomous Region. (Xinhua/Zhang Rufeng)

Photo taken on Nov. 2, 2016 shows the autumn scenery of a forest park in Nyingchi City, southwest China's Tibet Autonomous Region. (Xinhua/Zhang Rufeng)