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Farmers plant watermelon seedlings at a greenhouse in Longshan County in the Tujia and Miao Autonomous Prefecture of Xiangxi, central China's Hunan Province, Feb. 28, 2019. (Xinhua/Zeng Xianghui)
Farmers plant watermelon seedlings at a greenhouse in Longshan County in the Tujia and Miao Autonomous Prefecture of Xiangxi, central China's Hunan Province, Feb. 28, 2019. (Xinhua/Zeng Xianghui)