A child has fun at Nanshan Park in Lhasa, capital of southwest China`s Tibet Autonomous Region, July 30, 2019. (Xinhua/Zhang Rufeng)

Photo taken on July 30, 2019 shows the scenery of Nanshan Park in Lhasa, capital of southwest China`s Tibet Autonomous Region. (Xinhua/Zhang Rufeng)

Tourists visit Nanshan Park in Lhasa, capital of southwest China`s Tibet Autonomous Region, July 30, 2019. (Xinhua/Zhang Rufeng)

Tourists visit Nanshan Park in Lhasa, capital of southwest China`s Tibet Autonomous Region, July 30, 2019. (Xinhua/Zhang Rufeng)

Photo taken on July 30, 2019 shows the scenery of Potala Palace at Nanshan Park in Lhasa, capital of southwest China`s Tibet Autonomous Region. (Xinhua/Zhang Rufeng)