Combined photo taken on May 29, 2017 shows children playing at an aquatic park in Nantong, east China's Jiangsu Province, to greet the upcoming International Children's Day. (Xinhua/Xu Peiqin)

A girl learns to make pottery at a plaza in Suzhou, east China's Jiangsu Province, May 29, 2017, to greet the upcoming International Children's Day. (Xinhua/Wang Jiankang)

Balloons are released during an activity to greet the upcoming International Children's Day at Yufeng Park in Liuzhou, south China's Guangxi Zhuang Autonomous Region, May 29, 2017. (Xinhua/Li Hanchi)

Children wearing traditional costumes carry colorful umbrellas during a performance in Chenzhou, central China's Hunan Province, May 29, 2017, to greet the upcoming International Children's Day. (Xinhua/Liao Xin)