Zhang Yufei of Jiangsu team competes during the women's 100m butterfly final at the 2020 Chinese National Swimming Championships in Qingdao, east China's Shandong Province, Sept. 30, 2020. (Photos: Xinhua)

Hou Yujie of Henan team reacts after the men's 100m freestyle final at the 2020 Chinese National Swimming Championships in Qingdao, east China's Shandong Province, Sept. 30, 2020.

Zhang Yufei (C) of Jiangsu team, Li Shuang (L) of Henan team and Wang Yichun of Shandong team pose during the medal ceremony after the women's 100m butterfly final at the 2020 Chinese National Swimming Championships in Qingdao, east China's Shandong Province, Sept. 30, 2020.

Wu Yue of Zhejiang team competes during the women's 200m freestyle final at the 2020 Chinese National Swimming Championships in Qingdao, east China's Shandong Province, Sept. 30, 2020.

Yang Junxuan of Shandong team looks on after the women's 200m freestyle final at the 2020 Chinese National Swimming Championships in Qingdao, east China's Shandong Province, Sept. 30, 2020.

Hou Yujie of Henan team reacts after the men's 100m freestyle final at the 2020 Chinese National Swimming Championships in Qingdao, east China's Shandong Province, Sept. 30, 2020.

Wang Yichun of Shandong team competes during the women's 100m butterfly final at the 2020 Chinese National Swimming Championships in Qingdao, east China's Shandong Province, Sept. 30, 2020.

Yang Junxuan of Shandong team competes during the women's 200m freestyle final at the 2020 Chinese National Swimming Championships in Qingdao, east China's Shandong Province, Sept. 30, 2020.

Yang Junxuan of Shandong team looks at the score board after the women's 200m freestyle final at the 2020 Chinese National Swimming Championships in Qingdao, east China's Shandong Province, Sept. 30, 2020.

Zhang Yufei of Jiangsu team reacts after the women's 100m butterfly final at the 2020 Chinese National Swimming Championships in Qingdao, east China's Shandong Province, Sept. 30, 2020.

Hou Yujie (L) of Henan team reacts after the men's 100m freestyle final at the 2020 Chinese National Swimming Championships in Qingdao, east China's Shandong Province, Sept. 30, 2020.