Ren Xiangyu (L) and Ou Xuanyi of China compete during the men's doubles semifinal match against Jung Jae Wook and Kim Jae Hwan of South Korea at the U.S. Open Badminton Championships in Los Angeles, the United States, on June 16, 2018. Ren and Ou won 2-0. (Xinhua/Zhao Hanrong)