A medical worker instructs students the correct way to brush teeth at a school in Lincheng County of Xingtai City, north China's Hebei Province, Sept. 18, 2021. China's Dental Care Day falls on Sept. 20. (Xinhua/Luo Xuefeng)
China's Dental Care Day marked in Lincheng, Hebei
Source: Xinhua| 2021-09-19 13:32:09|Editor: huaxia
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