A medical staff member gives knowledge about teeth to students in Taolin county central primary school in Donghai village, East China's Jiangsu Province, Sept. 18, 2017. (Photo/Asianewsphoto)
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A medical staff member gives knowledge about teeth to students in Taolin county central primary school in Donghai village, East China's Jiangsu Province, Sept. 18, 2017. (Photo/Asianewsphoto)