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]

Group 1 - The 21st Hangzhou Sports Games concluded with a grand closing ceremony held at the Lin'an District Sports Culture Exhibition Center, attended by athletes, coaches, referees, and guests [1] - The event showcased the spirit and vigor of Hangzhou athletes as they entered the venue to uplifting music, highlighting the achievements of the games [1] - Various medal tables were presented, including competitive and mass participation categories, with top representatives receiving medals symbolizing their hard work and dedication [1] Group 2 - The games revealed emerging talents in Hangzhou sports, with notable performances such as Meng Zixin and Wu Qiman breaking the age group record in the women's 400m individual medley [1] - Young athlete Niu Hanxi from the upper city team achieved multiple first-place finishes in men's swimming events, setting new competition records [1] - A total of 17 athletes and 18 teams broke 22 competition records across 42 instances during the event [1]

Group 1 - The core event of the day was the women's 400m freestyle final, where Chinese swimmer Li Bingjie set a new Asian record and won a silver medal with a time of 3:58.21, defeating her American rival Katie Ledecky, who finished with a time of 3:58.49 [1][2] - The gold medal was claimed by Canadian swimmer Summer McIntosh, who achieved a time of 3:56.26, marking her as a rising star in the swimming world [1][2] - Li Bingjie expressed her surprise and excitement at surpassing Ledecky, emphasizing the significance of this victory for her [2] Group 2 - Young Chinese swimmer Yu Zidi, aged 12, successfully advanced to the finals of the women's 200m individual medley, finishing the semifinals with a time of 2:10.22, placing seventh [2][5] - Yu Zidi expressed her happiness about reaching the finals and her determination to continue improving [5] - In the men's 4x100m freestyle relay, the Chinese team finished fifth with a time of 3:11.15, while the Australian team won gold with a time of 3:08.97 [5][6] Group 3 - In the women's 4x100m freestyle relay, the Chinese team finished fourth with a time of 3:34.17, narrowly missing a medal as they were overtaken by the Netherlands in the final moments [6] - The Australian team won the event with a time of 3:30.60, while the USA and Netherlands secured silver and bronze respectively [6] - The men's 400m freestyle final saw German swimmer Mertens take gold with a time of 3:42.35, while Chinese swimmer Zhang Zhanshuo finished fifth with a time of 3:44.82 [6]