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Pupils demonstrate smiley cards to greet the upcoming World Smile Day at a primary school in Qinhuangdao, north China's Hebei Province, May 7, 2019. World Smile Day is celebrated on May 8 every year. (Xinhua/Cao Jianxiong)
World Smile Day marked in China
Source: Xinhua| 2019-05-07 22:34:27|Editor: mingmei
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