Group 1 - The core event is the women's 10-kilometer marathon swimming final at the 15th National Games, where 17-year-old Yin Fangfang won a silver medal, breaking Guangxi's medal drought in this event [1] - The competition took place in the natural sea area of Shenzhen Dapeng Peninsula, marking the first time marathon swimming was held in a natural sea environment at the National Games [1] - A total of 44 athletes from 18 delegations participated, with Yin Fangfang initially leading but finishing with a time of 2 hours, 12 minutes, and 4.8 seconds, ultimately securing the silver medal [1] Group 2 - Yin Fangfang's achievement is significant as it is the first medal for Guangxi in marathon swimming at the National Games, which has included this event since 2013 [1] - Coach Zhang Zishan highlighted Yin's exceptional talent and confidence, noting that her early race strategy was a reflection of her self-assurance [2] - Yin Fangfang, born in March 2008, joined the Guangxi swimming team in 2019 and has been focusing on long-distance events, gradually becoming a high-level competitor in the country [2]