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Aerial photo taken on Feb. 28, 2019 shows farmers setting up a greenhouse in Xizhuang Village, Qianxi County, north China's Hebei Province, Feb. 28, 2019. (Xinhua/Wang Aijun)
Aerial photo taken on Feb. 28, 2019 shows farmers setting up a greenhouse in Xizhuang Village, Qianxi County, north China's Hebei Province, Feb. 28, 2019. (Xinhua/Wang Aijun)