Primary school students in Yongchuan District hold a board of smiling face to welcome the upcoming World Smile Day on May 5, 2016 in Chongqing, China.
{"Image ImageDescription": "CHONGQING, CHINA - MAY 05: (CHINA OUT) Primary school students in Yongchuan District hold a board of smiling face to welcome the upcoming World Smile Day on May 5, 2016 in Chongqing, China. (Photo by Visual China Group via Getty Images/Visual China Group via Getty Images)", "Image Copyright": "2016 VCG"}