Xu Jiayu completed a golden-triple in the men's 50m backstroke with a time of 24.47 after he swept victories in 100m and 200m backstroke. Wang Peng took a silver in 25.17 and Li Guangyuan finished third in 25.28.
Team Zhejiang wrapped the men's and women's 4X100m medley relays in 4:02.50 and 3:37.51, respectively.
The eight-day competition, which attracted about 900 swimmers from 25 teams from March 24 to 31, serves as the qualifying tournament for the 2019 FINA Swimming World Championships in Gwangju, South Korea in July.