Aerial photo taken on April 6, 2020 shows a view of Zayu River in Zayu County of Nyingchi City, southwest China`s Tibet Autonomous Region. Zayu, located in the southeast of the Qinghai-Tibet Plateau, has a mild climate featuring abundant rainfall and sunshine. (Xinhua/Hou Jie)

Aerial photo taken on April 6, 2020 shows a view of Zayu River in Zayu County of Nyingchi City, southwest China`s Tibet Autonomous Region. Zayu, located in the southeast of the Qinghai-Tibet Plateau, has a mild climate featuring abundant rainfall and sunshine. (Xinhua/Hou Jie)

Photo taken on April 7, 2020 shows a view of Zayu Valley in Zayu County of Nyingchi City, southwest China`s Tibet Autonomous Region. Zayu, located in the southeast of the Qinghai-Tibet Plateau, has a mild climate featuring abundant rainfall and sunshine. (Xinhua/Huang Huo)

Aerial photo taken on April 6, 2020 shows a view of Zayu River in Zayu County of Nyingchi City, southwest China`s Tibet Autonomous Region. Zayu, located in the southeast of the Qinghai-Tibet Plateau, has a mild climate featuring abundant rainfall and sunshine. (Xinhua/Hou Jie)

Photo taken on April 7, 2020 shows a view of Zayu Valley in Zayu County of Nyingchi City, southwest China`s Tibet Autonomous Region. Zayu, located in the southeast of the Qinghai-Tibet Plateau, has a mild climate featuring abundant rainfall and sunshine. (Xinhua/Huang Huo)

Aerial photo taken on April 6, 2020 shows a view of Zayu River in Zayu County of Nyingchi City, southwest China`s Tibet Autonomous Region. Zayu, located in the southeast of the Qinghai-Tibet Plateau, has a mild climate featuring abundant rainfall and sunshine. (Xinhua/Hou Jie)