A competitor cleans his armor after a fight at the opening day of the 10th World National HMB (Historic Medieval Battle) Championship in Smederevo, Serbia on May 2, 2019. Fighters from 40 countries gathered in the Serbian city of Smederevo for an unusual international tournament that recreates historic battle techniques-the World National HMB Championship. The Chinese team is made up of 27 members, and it is China's third appearance at the event. (Xinhua/Shi Zhongyu)