Core Points - The 15th National Games swimming competition commenced, with Zhang Zhanshuo breaking the world youth record in the men's 400m freestyle, winning the first gold medal of the event with a time of 3 minutes 42.82 seconds [1][3] - The first day of swimming events awarded four gold medals, featuring several world-class athletes including Zhang Yufei, Li Bingjie, Wang Shun, and Pan Zhanle [3] - Li Bingjie won the women's 400m freestyle with a time of 4 minutes 01.17 seconds, expressing that her performance did not meet her expectations [3] - The men's 4x100m freestyle relay gold was claimed by Zhejiang team with a time of 3 minutes 15.01 seconds, while the women's relay was won by Shandong team at 3 minutes 36.51 seconds [3] - The swimming events at this National Games reference the Los Angeles Olympics, adding six new events, and will award a total of 41 gold medals over eight days [4]