Chinese swimming athlete Sun Yang practices in the pool for the upcoming Asian Games in Jakarta, Indonesia, on Aug. 15, 2018. (Xinhua/Fei Maohua)

Chinese swimming athlete Sun Yang practices in the pool for the upcoming Asian Games in Jakarta, Indonesia, on Aug. 15, 2018. (Xinhua/Li Xiang)

Chinese swimming athlete Sun Yang (R) practices in the pool for the upcoming Asian Games in Jakarta, Indonesia, on Aug. 15, 2018. (Xinhua/Li Xiang)

Chinese swimming athlete Sun Yang (L) practices in the pool for the upcoming Asian Games in Jakarta, Indonesia, on Aug. 15, 2018. (Xinhua/Li Xiang)

Chinese swimming athlete Sun Yang takes warm-up exercises for the upcoming Asian Games in Jakarta, Indonesia, on Aug. 15, 2018. (Xinhua/Li Xiang)

Chinese swimming athlete Sun Yang practices in the pool for the upcoming Asian Games in Jakarta, Indonesia, on Aug. 15, 2018. (Xinhua/Fei Maohua)

Chinese swimming athlete Sun Yang practices in the pool for the upcoming Asian Games in Jakarta, Indonesia, on Aug. 15, 2018. (Xinhua/Li Xiang)

Chinese swimming athlete Sun Yang takes warm-up exercises for the upcoming Asian Games in Jakarta, Indonesia, on Aug. 15, 2018. (Xinhua/Li Xiang)

Chinese swimming athlete Sun Yang (Bottom) takes warm-up exercises for the upcoming Asian Games in Jakarta, Indonesia, Aug. 15, 2018. (Xinhua/Fei Maohua)

Chinese swimming athlete Sun Yang (R) practices in the pool for the upcoming Asian Games in Jakarta, Indonesia, on Aug. 15, 2018. (Xinhua/Fei Maohua)