Visitors take photos at a greenhouse during the 8th Winter Agriculture Expo and Trade Fair on Spring Festival at the Agri-Expo Garden in Changchun, capital city of northeast China's Jilin Province, Jan. 18, 2017. (Xinhua/Zhang Nan)
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Visitors take photos at a greenhouse during the 8th Winter Agriculture Expo and Trade Fair on Spring Festival at the Agri-Expo Garden in Changchun, capital city of northeast China's Jilin Province, Jan. 18, 2017. (Xinhua/Zhang Nan)
