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Children play glass balls during an event in celebration of the upcoming International Children's Day at an elementary school in Feixiang District of Handan City, north China's Hebei Province, May 31, 2019. (Xinhua/Hu Gaolei)
Children play glass balls during an event in celebration of the upcoming International Children's Day at an elementary school in Feixiang District of Handan City, north China's Hebei Province, May 31, 2019. (Xinhua/Hu Gaolei)