Children grind beans with a stone mill during a themed event in east China's Shanghai, June 1, 2019. Various activities are held across the county to celebrate the International Children's Day, which falls on Saturday. (Xinhua/Liu Ying)

Children play Guqin, a seven-string traditional Chinese instrument, at Taiyuan Library in Taiyuan City, north China's Shanxi Province, June 1, 2019. Various activities are held across the county to celebrate the International Children's Day, which falls on Saturday. (Xinhua/Yang Chenguang)

Children work on a painting at Huitong Village of Jinding Township in Zhuhai City, south China's Guangdong Province, June 1, 2019. Various activities are held across the county to celebrate the International Children's Day, which falls on Saturday. (Xinhua/Deng Hua)

Children play games at a women and children activity center in Yinchuan City, northwest China's Ningxia Hui Autonomous Region, June 1, 2019. Various activities are held across the county to celebrate the International Children's Day, which falls on Saturday. (Xinhua/Feng Kaihua)

Children work on a painting at Huitong Village of Jinding Township in Zhuhai City, south China's Guangdong Province, June 1, 2019. Various activities are held across the county to celebrate the International Children's Day, which falls on Saturday. (Xinhua/Liu Dawei)

Children work on a painting at Huitong Village of Jinding Township in Zhuhai City, south China's Guangdong Province, June 1, 2019. Various activities are held across the county to celebrate the International Children's Day, which falls on Saturday. (Xinhua/Lu Hanxin)

Children sing a song during an event at a women and children service center in Beijing, capital of China, June 1, 2019. Various activities are held across the county to celebrate the International Children's Day, which falls on Saturday. (Xinhua/Ren Chao)

In Bozhou City, east China's Anhui Province, June 1, 2019. Various activities are held across the county to celebrate the International Children's Day, which falls on Saturday. (Xinhua/Liu Qinli)

Children play games at a kindergarten in Renxian County of Xingtai City, north China's Hebei Province, June 1, 2019. Various activities are held across the county to celebrate the International Children's Day, which falls on Saturday. (Xinhua/Song Jie)

Children and their parents participate in a bubble run at Beijing Garden Expo Park in Beijing, capital of China, June 1, 2019. Various activities are held across the county to celebrate the International Children's Day, which falls on Saturday. (Xinhua/Liu Xianguo)

A child tries a VR device in Tuquan County, north China's Inner Mongolia Autonomous Region, June 1, 2019. Various activities are held across the county to celebrate the International Children's Day, which falls on Saturday. (Xinhua/Ha Linuo)

Children do handwork at a parent-child club in Guiyang City, southwest China's Guizhou Province, June 1, 2019. Various activities are held across the county to celebrate the International Children's Day, which falls on Saturday. (Xinhua/Tao Liang)

A child participates in a bubble run at Beijing Garden Expo Park in Beijing, capital of China, June 1, 2019. Various activities are held across the county to celebrate the International Children's Day, which falls on Saturday. (Xinhua/Liu Xianguo)

A child catches a carp during a carp cultural event in Zhengzhou City, central China's Henan Province, June 1, 2019. Various activities are held across the county to celebrate the International Children's Day, which falls on Saturday. (Xinhua/Li Jia'nan)

Children play drums at the square of Wanda Plaza in Wuxi City, east China's Jiangsu Province, June 1, 2019 Various activities are held across the county to celebrate the International Children's Day, which falls on Saturday. (Xinhua)

A man and his child play glass balls at Hainan Museum in Haikou, capital of south China's Hainan Province, June 1, 2019. A special event featuring "old games" including playing glass balls and hopscotch is held on Saturday to celebrate the International Children's Day. (Xinhua/Guo Cheng)

Children play picture cards at Hainan Museum in Haikou, capital of south China's Hainan Province, June 1, 2019. A special event featuring "old games" including playing glass balls and hopscotch is held on Saturday to celebrate the International Children's Day. (Xinhua/Guo Cheng)

A child plays hopscotch at Hainan Museum in Haikou, capital of south China's Hainan Province, June 1, 2019. A special event featuring "old games" including playing glass balls and hopscotch is held on Saturday to celebrate the International Children's Day. (Xinhua/Guo Cheng)

People participate in a loop-rolling game at Hainan Museum in Haikou, capital of south China's Hainan Province, June 1, 2019. A special event featuring "old games" including playing glass balls and hopscotch is held on Saturday to celebrate the International Children's Day. (Xinhua/Guo Cheng)

A child and his father spin a top at Hainan Museum in Haikou, capital of south China's Hainan Province, June 1, 2019. A special event featuring "old games" including playing glass balls and hopscotch is held on Saturday to celebrate the International Children's Day. (Xinhua/Guo Cheng)