A child demonstrates Kunfu (martial art) in the final of Rwandan National Kung-fu Championships in Kigali, capital city of Rwanda, on Dec. 10, 2017.(Xinhua/Gabriel Dusabe)

A child demonstrates Kunfu (martial art) in the final of Rwandan National Kung-fu Championships in Kigali, capital city of Rwanda, on Dec. 10, 2017.(Xinhua/Gabriel Dusabe)

A child demonstrates Kunfu (martial art) in the final of Rwandan National Kung-fu Championships in Kigali, capital city of Rwanda, on Dec. 10, 2017.(Xinhua/Gabriel Dusabe)