A truck runs on a road in Xainza County, Nagqu, southwest China`s Tibet Autonomous Region, Oct. 12, 2019. (Xinhua/Zhou Jinshuai)

Photo taken on Oct. 12, 2019 shows Cering Co Lake in Xainza County, Nagqu, southwest China`s Tibet Autonomous Region. (Xinhua/Zhou Jinshuai)

Photo taken on Oct. 11, 2019 shows sunset scenery in Xainza County, Nagqu, southwest China`s Tibet Autonomous Region. (Xinhua/Zhou Jinshuai)

Photo taken on Oct. 13, 2019 shows a road in Gerze County of Ali, southwest China`s Tibet Autonomous Region. (Xinhua/Zhou Jinshuai)

A tourist views Cering Co Lake in Xainza County, Nagqu, southwest China`s Tibet Autonomous Region, Oct. 12, 2019. (Xinhua/Zhou Jinshuai)

Photo taken on Oct. 12, 2019 shows Serling Co Lake near No. 317 national highway in southwest China`s Tibet Autonomous Region. (Xinhua/Zhou Jinshuai)