BEIJING, April 11, 2016 (Xinhua) -- Tourists walk on the terraced fields in Shangbao Township of Ganzhou City, east China's Jiangxi Province, May 28, 2013. China has perfected the art of building terraced fields as an effective way to preserve water and soil, and had a long history of terracing the ridges for high-yield cropping.(Xinhua/Wang Song)
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