ZHUJI, May 7, 2014 - Students show their paintings of smiling faces in Zhuji City, east China's Zhejiang Province, May 7, 2014, to celebrate the upcoming World Smile Day, which falls on May 8.

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Oranges are made into smiling faces in Hohhot, capital of north China's Inner Mongolia Autonomous Region, May 7, 2014, to celebrate the upcoming World Smile Day, which falls on May 8.

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