A visitor looks at an exhibit at Guizhou Provincial Museum in Guiyang, southwest China's Guizhou Province, May 18, 2018. Friday marks the International Museum Day. (Xinhua/Liu Xu)

A visitor takes photos of an exhibit at Guizhou Provincial Museum in Guiyang, southwest China's Guizhou Province, May 18, 2018. Friday marks the International Museum Day. (Xinhua/Liu Xu)

Visitors view exhibits at Guizhou Provincial Museum in Guiyang, southwest China's Guizhou Province, May 18, 2018. Friday marks the International Museum Day. (Xinhua/Liu Xu)

Visitors view an exhibit at Guizhou Provincial Museum in Guiyang, southwest China's Guizhou Province, May 18, 2018. Friday marks the International Museum Day. (Xinhua/Liu Xu)

A visitor takes photos of an exhibit at Guizhou Provincial Museum in Guiyang, southwest China's Guizhou Province, May 18, 2018. Friday marks the International Museum Day. (Xinhua/Liu Xu)