Group 1 - The Chinese diving team won both gold and silver medals in the women's 3m springboard event at the World Swimming Championships in Singapore, marking a total of 9 golds for the team in this championship [1] - Chen Yiwen and rising star Chen Jia dominated the women's 3m springboard final, scoring 389.70 and 356.40 points respectively, with Italy's Pellacani taking bronze with 323.20 points [1] - This victory marks the 14th consecutive gold medal for the Chinese diving team in this event at the World Championships, with Chen Yiwen expressing increased confidence for future competitions [1] Group 2 - In the women's 800m freestyle final, American swimmer Katie Ledecky won with a time of 8:05.62, breaking her own championship record and securing her 7th gold in this event [2] - Canadian swimmer McIntosh, who was close to Ledecky's new world record, finished third with a time of 8:07.29 after being overtaken in the final sprint [2] - Chinese swimmer Li Bingjie finished fifth in the same event with a time of 8:15.59, unable to advance further after starting in fifth place [4] Group 3 - In the women's 200m backstroke final, Chinese swimmers Peng Xuwei and Liu Yaxin finished fourth and sixth with times of 2:07.22 and 2:09.71 respectively, while Australia's McKeon won the event, breaking the championship record with a time of 2:03.33 [5] - A new world record was set in the mixed 4x100m freestyle relay by the American team with a time of 3:18.48, marking the second world record of the event [5] - The Chinese team, consisting of Chen Jun'er, Wang Haoyu, Yu Yiting, and Yang Wenwen, finished tenth in the preliminaries of the mixed relay and did not qualify for the finals [5]