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A farmer harvests cowpeas in Yazhou District in Sanya, south China's Hainan Province, Jan. 5, 2020. Yazhou District is an importance hub of vegetable production in Hainan Province. (Photo by Pu Xiaoxu/Xinhua)
A farmer harvests cowpeas in Yazhou District in Sanya, south China's Hainan Province, Jan. 5, 2020. Yazhou District is an importance hub of vegetable production in Hainan Province. (Photo by Pu Xiaoxu/Xinhua)