Sun Yang of China competes during Men's 800m Freestyle Final in the 18th Asian Games in Jakarta, Indonesia, Aug. 20, 2018. Sun won the gold medal. (Xinhua/Li Xiang)

Sun Yang of China competes during Men's 800m Freestyle Final in the 18th Asian Games in Jakarta, Indonesia, Aug. 20, 2018. (Xinhua/Fei Maohua)

Sun Yang of China enters water as he competes in Men's 800m Freestyle Final in the 18th Asian Games in Jakarta, Indonesia, Aug. 20, 2018. (Xinhua/Fei Maohua)

Sun Yang of China celebrates after Men's 800m Freestyle Final in the 18th Asian Games in Jakarta, Indonesia, Aug. 20, 2018. Sun won the gold medal. (Xinhua/Fei Maohua)

Sun Yang of China celebrates after Men's 800m Freestyle Final in the 18th Asian Games in Jakarta, Indonesia, Aug. 20, 2018. Sun won the gold medal. (Xinhua/Li Xiang)

Sun Yang (Rear) of China shakes hands with another contestant after Men's 800m Freestyle Final in the 18th Asian Games in Jakarta, Indonesia, Aug. 20, 2018. Sun won the gold medal. (Xinhua/Li Xiang)

Sun Yang of China enters water as he competes in Men's 800m Freestyle Final in the 18th Asian Games in Jakarta, Indonesia, Aug. 20, 2018. Sun won the gold medal. (Xinhua/Li Xiang)

Sun Yang of China competes during Men's 800m Freestyle Final in the 18th Asian Games in Jakarta, Indonesia, Aug. 20, 2018. Sun won the gold medal. (Xinhua/Li Xiang)

Sun Yang of China competes during Men's 800m Freestyle Final in the 18th Asian Games in Jakarta, Indonesia, Aug. 20, 2018. Sun won the gold medal. (Xinhua/Fei Maohua)

Sun Yang of China competes during Men's 800m Freestyle Final in the 18th Asian Games in Jakarta, Indonesia, Aug. 20, 2018. Sun won the gold medal. (Xinhua/Du Yu)