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Tourists view a zigzag section of No. 318 national road, in Yajiang County, southwest China's Sichuan Province, on Aug. 4, 2019. (Xinhua/Jiang Hongjing)
Tourists view a zigzag section of No. 318 national road, in Yajiang County, southwest China's Sichuan Province, on Aug. 4, 2019. (Xinhua/Jiang Hongjing)