Photo taken on May 18, 2020 shows an exhibit at the Liaoning Provincial Museum in Shenyang, northeast China's Liaoning Province. May 18 marks the International Museum Day. (Photos: Xinhua/Yao Jianfeng)

A visitor views exhibits at the Liaoning Provincial Museum in Shenyang, northeast China's Liaoning Province, May 18, 2020. May 18 marks the International Museum Day.

Visitors view exhibits at the Liaoning Provincial Museum in Shenyang, northeast China's Liaoning Province, May 18, 2020. May 18 marks the International Museum Day.

Visitors view exhibits at the Liaoning Provincial Museum in Shenyang, northeast China's Liaoning Province, May 18, 2020. May 18 marks the International Museum Day.

A visitor views exhibits at the Liaoning Provincial Museum in Shenyang, northeast China's Liaoning Province, May 18, 2020. May 18 marks the International Museum Day.