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A tourist visits the scenic spot of Riyue Tan, or the Sun Moon Lake, in Nantou County, southeast China's Taiwan, July 10, 2019. (Xinhua/Zhu Xiang)

A tourist visits the scenic spot of Riyue Tan, or the Sun Moon Lake, in Nantou County, southeast China's Taiwan, July 10, 2019. (Xinhua/Zhu Xiang)