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Tourists walk on a glass skywalk at "Secret Dongba" scenic spot in Lijiang, southwest China's Yunnan Province, June 7, 2019. (Xinhua/Li Ning)
 
 
Tourists walk on a glass skywalk at "Secret Dongba" scenic spot in Lijiang, southwest China's Yunnan Province, June 7, 2019. (Xinhua/Li Ning)