Composite photo shows star trails over Potala Palace in Lhasa, southwest China's Tibet Autonomous Region, May 4, 2022. (Xinhua/Zhou Dixiao)

Composite photo shows star trails over Lhasa, southwest China's Tibet Autonomous Region, May 4, 2022. (Xinhua/Zhou Dixiao)

Composite photo shows star trails over Lhasa, southwest China's Tibet Autonomous Region, May 4, 2022. (Xinhua/Zhou Dixiao)