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Kids demonstrate smiley cards to greet the upcoming World Smile Day at a kindergarten in Zigui County, central China's Hubei Province, May 7, 2019. World Smile Day is celebrated on May 8 every year. (Xinhua/Wang Huifu)
World Smile Day marked in China
Source: Xinhua| 2019-05-07 22:34:27|Editor: mingmei
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