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A farmer picks tomatoes at a greenhouse in Wuzhuangzi Village of Puzidian Township in Zunhua City, north China's Hebei Province, Feb. 22, 2019. (Xinhua/Liu Mancang)
A farmer picks tomatoes at a greenhouse in Wuzhuangzi Village of Puzidian Township in Zunhua City, north China's Hebei Province, Feb. 22, 2019. (Xinhua/Liu Mancang)