In this file photo issued on March 8, 1975, parents buy toys for their children at a shop in east China's Shanghai. As China celebrates the International Children's Day, there arises the occasion for grown-ups to think back over the joys of childhood. With the evolution of technology and lifestyle, children are exposed to a wider range of entertainment. Nevertheless, joy would remain a childhood motif no matter how its forms change with time. (Xinhua/Shen Zhengchu)
In this file photo taken on Dec. 18, 2007, students play a classic marble game at Changjianglu Primary School in Nanjing, east China's Jiangsu Province. As China celebrates the International Children's Day, there arises the occasion for grown-ups to think back over the joys of childhood. With the evolution of technology and lifestyle, children are exposed to a wider range of entertainment. Nevertheless, joy would remain a childhood motif no matter how its forms change with time. (Xinhua/Sun Can)
In this file photo issued on July 6, 1963, girls play Chinese jump rope in east China's Shanghai. As China celebrates the International Children's Day, there arises the occasion for grown-ups to think back over the joys of childhood. With the evolution of technology and lifestyle, children are exposed to a wider range of entertainment. Nevertheless, joy would remain a childhood motif no matter how its forms change with time. (Xinhua/Xia Daoling)
In this file photo issued on August 1, 1994, two boys practise skateboard in a square in Beijing, capital of China. As China celebrates the International Children's Day, there arises the occasion for grown-ups to think back over the joys of childhood. With the evolution of technology and lifestyle, children are exposed to a wider range of entertainment. Nevertheless, joy would remain a childhood motif no matter how its forms change with time. (Xinhua/Zhang Xu)
In this file photo taken on Sept. 16, 2016, children enjoy themselves in a foam activity in a tourist resort in southwest China's Chongqing. As China celebrates the International Children's Day, there arises the occasion for grown-ups to think back over the joys of childhood. With the evolution of technology and lifestyle, children are exposed to a wider range of entertainment. Nevertheless, joy would remain a childhood motif no matter how its forms change with time. (Xinhua/Zhang Yi)
In this file photo issued on Feb. 10, 1990, children play a ball game at a boarding school in southwest China's Tibet Autonomous Region. As China celebrates the International Children's Day, there arises the occasion for grown-ups to think back over the joys of childhood. With the evolution of technology and lifestyle, children are exposed to a wider range of entertainment. Nevertheless, joy would remain a childhood motif no matter how its forms change with time. (Xinhua/Ma Jingqiu)
In this file photo issued on July 27, 1985, a boy tries a gaming console during a toy fair in Fuzhou, southeast China's Fujian Province. As China celebrates the International Children's Day, there arises the occasion for grown-ups to think back over the joys of childhood. With the evolution of technology and lifestyle, children are exposed to a wider range of entertainment. Nevertheless, joy would remain a childhood motif no matter how its forms change with time. (Xinhua/Huang Xingquan)
In this file photo taken on May 28, 2017, children wear VR (virtual reality) equipment during a technology event in Xi'an, northwest China's Shaanxi Province. As China celebrates the International Children's Day, there arises the occasion for grown-ups to think back over the joys of childhood. With the evolution of technology and lifestyle, children are exposed to a wider range of entertainment. Nevertheless, joy would remain a childhood motif no matter how its forms change with time. (Xinhua/Liu Xiao)
In this file photo taken on July 28, 2006, children ride a thrill machine at an amusement park in Hangzhou, east China's Zhejiang Province. As China celebrates the International Children's Day, there arises the occasion for grown-ups to think back over the joys of childhood. With the evolution of technology and lifestyle, children are exposed to a wider range of entertainment. Nevertheless, joy would remain a childhood motif no matter how its forms change with time. (Xinhua/Shao Quanda)
In this file photo taken in 1983, children play a bag toss game at a public park in Harbin, northeast China's Heilongjiang Province. As China celebrates the International Children's Day, there arises the occasion for grown-ups to think back over the joys of childhood. With the evolution of technology and lifestyle, children are exposed to a wider range of entertainment. Nevertheless, joy would remain a childhood motif no matter how its forms change with time. (Xinhua/Hu Wei)