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)