Students perform during an event to celebrate the 70th anniversary of the founding of the People's Republic of China at Tibet University in Lhasa, capital of southwest China's Tibet Autonomous Region, Sept. 12, 2019. (Xinhua/Jigme Dorje)

Students perform during an event to celebrate the 70th anniversary of the founding of the People's Republic of China at Tibet University in Lhasa, capital of southwest China's Tibet Autonomous Region, Sept. 12, 2019. (Xinhua/Jigme Dorje)

Students perform during an event to celebrate the 70th anniversary of the founding of the People's Republic of China at Tibet University in Lhasa, capital of southwest China's Tibet Autonomous Region, Sept. 12, 2019. (Xinhua/Jigme Dorje)