BEIJING, April 11, 2016 (Xinhua) -- Photo taken on April 10, 2016 shows terraced fields in Longji Township of Longsheng County, south China's Guangxi Zhuang Autonomous Region. 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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