Xu Chenhao of China serves the ball during a match with Ro Hyon Song of the Democratic People's Republic of Korea (DPRK) at Men's team group A preliminary round between team China and team DPRK at the 7th International Military Sports Council (CISM) Military World Games in Wuhan, capital of central China's Hubei Province, Oct. 19, 2019.(Xinhua/Hou Jun)