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Students learn about oral hygiene ahead of national day for dental care

chinadaily.com.cn/Xinhua | 2017-09-20 09:21

Students learn about oral hygiene ahead of national day for dental care

Students learn to brush teeth in the correct way in a primary school in Lianyungang, East China's Jiangsu province, Sept 19, 2017. [Photo/Xinhua]

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