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A staff member presents silkworm cocoons at a collecting station in Hai'an City, east China's Jiangsu Province, June 2, 2018. Hai'an is known for its silk cocoon industry. (Xinhua/Xu Jinbai)
A staff member presents silkworm cocoons at a collecting station in Hai'an City, east China's Jiangsu Province, June 2, 2018. Hai'an is known for its silk cocoon industry. (Xinhua/Xu Jinbai)