China's Sun Yang shows his gold medal after winning the gold medal at men's 200m freestyle final at the GBK Aquatics Center in Jakarta, Indonesia on Aug. 19, 2018. 

Chinese swimmer Sun Yang claimed the gold medal in the 200m freestyle event at the 2018 Asian Games.

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China's Sun Yang shows his gold medal after winning the gold medal at men's 200m freestyle final at the GBK Aquatics Center in Jakarta, Indonesia on Aug. 19, 2018.

Sun Yang of China begins to swim at men's 200m freestyle final at the GBK Aquatics Center in Jakarta, Indonesia on Aug. 19, 2018.

Sun Yang of China celebrates after winning the gold medal at men's 200m freestyle final at the GBK Aquatics Center in Jakarta, Indonesia on Aug. 19, 2018.

China's Sun Yang shows his gold medal after winning the gold medal at men's 200m freestyle final at the GBK Aquatics Center in Jakarta, Indonesia on Aug. 19, 2018.

Sun Yang of China prepares to participate in men's 200m freestyle final at the GBK Aquatics Center in Jakarta, Indonesia on Aug. 19, 2018.

Li Bingjie of China is in action in the women's 1500m freestyle event at the GBK Aquatics Center in Jakarta, Indonesia on Aug. 19, 2018.

Liu Yaxin competes at women's 200m backstroke final of the 2018 Asian Games in Jakarta, Indonesia on Aug. 19, 2018.

Xu Jiayu of China celebrates after winning the gold medal of men's 100m backstroke final in the 18th Asian Games in Jakarta, Indonesia, Aug. 19, 2018.

Xu Jiayu of China competes during men's 100m backstroke final in the 18th Asian Games in Jakarta, Indonesia, Aug。 19, 2018.

Sun Yang of China begins to swim at men's 200m freestyle final at the GBK Aquatics Center in Jakarta, Indonesia on Aug. 19, 2018. 

Sun Yang of China celebrates after winning the gold medal at men's 200m freestyle final at the GBK Aquatics Center in Jakarta, Indonesia on Aug. 19, 2018.

China's Sun Yang shows his gold medal after winning the gold medal at men's 200m freestyle final at the GBK Aquatics Center in Jakarta, Indonesia on Aug. 19, 2018. 

Sun Yang of China prepares to participate in men's 200m freestyle final at the GBK Aquatics Center in Jakarta, Indonesia on Aug. 19, 2018.

Li Bingjie of China is in action in the women's 1500m freestyle event at the GBK Aquatics Center in Jakarta, Indonesia on Aug. 19, 2018.

Chinese swimmers Wang Jianjiahe and Li Bingjie claimed the gold and silver medals in the 1500m freestyle event at the 2018 Asian Games.

Liu Yaxin competes at women's 200m backstroke final of the 2018 Asian Games in Jakarta, Indonesia on Aug. 19, 2018.

Liu Yaxin of China wins gold medal at women's 200m backstroke final of the 2018 Asian Games.

Xu Jiayu of China celebrates after winning the gold medal of men's 100m backstroke final in the 18th Asian Games in Jakarta, Indonesia, Aug. 19, 2018. 

Xu Jiayu of China wins gold medal of men's 100m backstroke final at 18th Asian Games Sunday.

Xu Jiayu of China competes during men's 100m backstroke final in the 18th Asian Games in Jakarta, Indonesia, Aug。 19, 2018.