Students learn first aid skills at a primary school of Hanshan District in Handan, north China's Hebei Province, May 28, 2019. Various events are held in celebration of the upcoming International Children's Day. (Photos: Xinhua/Wang Hongchao)

Children interact with robot toys during a Children's Day theme event at Matou Community in Sanjiang Township of Jinping County in Miao-Dong Autonomous Prefecture of Qiandongnan, southwest China's Guizhou Province, May 28, 2019. Various events are held in celebration of the upcoming International Children's Day.

Primary school pupils paint wooden ladle (mashao) masks during a Children's Day theme activity in Jinan, capital of east China's Shandong Province, May 28, 2019. Various events are held in celebration of the upcoming International Children's Day.

Children learn waste sorting knowledge during a Children's Day theme event at Matou Community in Sanjiang Township of Jinping County in Miao-Dong Autonomous Prefecture of Qiandongnan, southwest China's Guizhou Province, May 28, 2019. Various events are held in celebration of the upcoming International Children's Day.

Primary school pupils play pitch-pot, or Touhu game, an ancient entertainment that requires players to throw sticks from a set distance into a canister, in Zunhua City, north China's Hebei Province, May 28, 2019. Various events are held in celebration of the upcoming International Children's Day.