Xu Jiayu (bottom) and Yan Zibei of Suezhelu team compete during the mixed 4X100m medley relay heat at the 2020 Chinese National Swimming Championships in Qingdao, east China's Shandong Province, Oct. 1, 2020. Suezhelu team broke the world record with 3 minutes 38.41 seconds. (Xinhua/Tao Xiyi)
