A staff member cleans school buss to prepare for the new semester in Hongze District of Huai'an City, east China's Jiangsu Province, Feb. 24, 2018. (Xinhua/Chen Liang)
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A staff member cleans school buss to prepare for the new semester in Hongze District of Huai'an City, east China's Jiangsu Province, Feb. 24, 2018. (Xinhua/Chen Liang)
