Group 1 - The 2025 National Swimming Championships took place in Shenzhen, Guangdong, where five gold medals were awarded [1] - Qin Haiyang won the men's 50m breaststroke with a time of 26.71 seconds, leading the runner-up by 0.27 seconds [1] - Li Bingjie claimed the women's 200m freestyle gold medal, setting a personal best of 1:55.52, marking her third gold of the event [1] Group 2 - The Zhejiang team, consisting of world champions, won the mixed 4×100m relay with a time of 3:44.95 [2] - Zhang Zhanshuo from Shandong won the men's 800m freestyle but expressed dissatisfaction with his performance due to health issues [2] - Olympic champions Pan Zhanle and Wang Shun advanced to the finals in their respective events scheduled for May 21 [2]