Photo taken on June 8, 2020 shows the Potala Palace illuminated at night in Lhasa, southwest China's Tibet Autonomous Region. (Xinhua/Zhan Yan)

A tourist poses for photos in front of the Potala Palace in Lhasa, southwest China's Tibet Autonomous Region, June 8, 2020. (Xinhua/Zhan Yan)

Tourists visit the Potala Palace at night in Lhasa, southwest China's Tibet Autonomous Region, June 8, 2020. (Xinhua/Zhan Yan)

A couple pose for wedding photos in front of the Potala Palace in Lhasa, southwest China's Tibet Autonomous Region, June 8, 2020. (Xinhua/Zhan Yan)