Tourists visit a scenic spot in Tongzi County, southwest China's Guizhou Province, July 31, 2018. (Xinhua/Deng Gang)

Tourists visit a scenic spot in Tongzi County, southwest China's Guizhou Province, July 31, 2018. (Xinhua/Deng Gang)

A tourist visits a scenic spot in Tongzi County, southwest China's Guizhou Province, July 31, 2018. (Xinhua/Deng Gang)