People take tour boats at Longwangtan Park near the Potala Palace in Lhasa, southwest China's Tibet Autonomous Region, June 21, 2020. (Xinhua/Zhang Rufeng)

Two boys play with kick scooters at Longwangtan Park near the Potala Palace in Lhasa, southwest China's Tibet Autonomous Region, June 21, 2020. (Xinhua/Zhang Rufeng)

People visit Longwangtan Park near the Potala Palace in Lhasa, southwest China's Tibet Autonomous Region, June 21, 2020. (Xinhua/Zhang Rufeng)

People take a tour boat at Longwangtan Park near the Potala Palace in Lhasa, southwest China's Tibet Autonomous Region, June 21, 2020. (Xinhua/Zhang Rufeng)