Mark line swings around the victory line during a Yajia competition at the 11th National Traditional Games of Ethnic Minorities of the People's Republic of China in Zhengzhou, central China's Henan Province, Sept. 10, 2019. Yajia, a game like tug-of-war but back to back, is a favorite sport of the Tibetan ethnic group in China. Two athletes stand back to back in a rectangle ground of 2 meters wide and 9 meters long, and two rings linked by rope intertwines from their crotches to necks. The athlete who pulls the mark line in the middle of rope to pass the victory line will win the game.