Athlete Cao Shu of China's national triathlon selection team trains in a swimming pool during a training session in Weihai City, east China's Shandong Province, June 6, 2020. (Xinhua/Zhu Zheng)

Athlete Zhang Siyi of China's national triathlon selection team trains in a swimming pool during a training session in Weihai City, east China's Shandong Province, June 6, 2020. (Xinhua/Zhu Zheng)

Athlete Peng Qiuyue (above L) of China's national triathlon selection team trains indoors during a training session in Weihai City, east China's Shandong Province, June 6, 2020. (Xinhua/Zhu Zheng)

Xu Yongsheng (R), coach of China's national triathlon selection team, talks with athlete Lu Shichen during a training session in Weihai City, east China's Shandong Province, June 6, 2020. (Xinhua/Zhu Zheng)

Athlete Zhang Siyi (front) of China's national triathlon selection team trains indoors during a training session in Weihai City, east China's Shandong Province, June 6, 2020. (Xinhua/Zhu Zheng)

Athlete Fan Junjie (R) of China's national triathlon selection team trains indoors during a training session in Weihai City, east China's Shandong Province, June 6, 2020. (Xinhua/Zhu Zheng)

Athlete Fan Junjie of China's national triathlon selection team trains in a swimming pool during a training session in Weihai City, east China's Shandong Province, June 6, 2020. (Xinhua/Zhu Zheng)

Xu Yongsheng (1st R), coach of China's national triathlon selection team, instructs athletes during a training session in Weihai City, east China's Shandong Province, June 6, 2020. (Xinhua/Zhu Zheng)

Athletes of China's national triathlon selection team train indoors during a training session in Weihai City, east China's Shandong Province, June 6, 2020. (Xinhua/Zhu Zheng)

Athlete Lu Shichen (front) of China's national triathlon selection team trains indoors during a training session in Weihai City, east China's Shandong Province, June 6, 2020. (Xinhua/Zhu Zheng)

Xu Yongsheng (R), coach of China's national triathlon selection team, makes records for athletes during a training session in Weihai City, east China's Shandong Province, June 6, 2020. (Xinhua/Zhu Zheng)

Xu Yongsheng (L), coach of China's national triathlon selection team, makes records for athletes during a training session in Weihai City, east China's Shandong Province, June 6, 2020. (Xinhua/Zhu Zheng)

Athlete Lu Shichen of China's national triathlon selection team trains indoors during a training session in Weihai City, east China's Shandong Province, June 6, 2020. (Xinhua/Zhu Zheng)

Xu Yongsheng (R), coach of China's national triathlon selection team, makes records for athletes during a training session in Weihai City, east China's Shandong Province, June 6, 2020. (Xinhua/Zhu Zheng)

Athlete Zhang Zhiying of China's national triathlon selection team trains in a swimming pool during a training session in Weihai City, east China's Shandong Province, June 6, 2020. (Xinhua/Zhu Zheng)

Athlete Zhang Siyi (L) of China's national triathlon selection team trains indoors during a training session in Weihai City, east China's Shandong Province, June 6, 2020. (Xinhua/Zhu Zheng)

Athletes of China's national triathlon selection team train indoors during a training session in Weihai City, east China's Shandong Province, June 6, 2020. (Xinhua/Zhu Zheng)