Visitors view an exhibit during an exhibition featuring Tibetan cultural relics at the Treasure Hall of the Potala Palace in Lhasa, capital of southwest China's Tibet Autonomous Region, Oct. 5, 2019. More than 200 cultural relics made in different historical periods of Tibet were on display. (Xinhua/Jigme Dorje)

Visitors walk into the Treasure Hall during an exhibition featuring Tibetan cultural relics at the Potala Palace in Lhasa, capital of southwest China's Tibet Autonomous Region, Oct. 5, 2019. More than 200 cultural relics made in different historical periods of Tibet were on display. (Xinhua/Jigme Dorje)

A visitor views an exhibit during an exhibition featuring Tibetan cultural relics at the Treasure Hall of the Potala Palace in Lhasa, capital of southwest China's Tibet Autonomous Region, Oct. 5, 2019. More than 200 cultural relics made in different historical periods of Tibet were on display. (Xinhua/Jigme Dorje)

A visitor views exhibits during an exhibition featuring Tibetan cultural relics at the Treasure Hall of the Potala Palace in Lhasa, capital of southwest China's Tibet Autonomous Region, Oct. 5, 2019. More than 200 cultural relics made in different historical periods of Tibet were on display. (Xinhua/Jigme Dorje)