Olympic champion Sun Yang, facing a new coaching regime after China nationals in Huangshan, Anhui Province, dominated the 400m freestyle, leading from go to gold in 3:43.97.

"I'm very confident in 400m and 1500m free," the 21-year-old double gold medallist from London 2012 told Xinhua. "But over 200m I still got a lot of rivals from the rest of the world. I'm working on it to get better." Li Yunqi from Henan took the silver in 3:47.96, while Hunan's Wang Kecheng claimed bronze in 3:52.77.

Zhejiang province celebrated a second gold over 400m freestyle when Shao Yiwen took the women's title in 4:07.18. 

The men's 200m medley went to Zhang Fenglin, of Shandong, in 1:59.79 seconds, while Hunan's Huang Chaosheng took the 200m breaststroke in 2:12.67.

The women's 100m breaststroke went to Sun Ye, from Shanghai, in 1:08.84, while the men's 50m backstroke went to Cheng Feiyi, from Liaoning, in 25.37. In the women's 200m backstroke, Shandong's Luan Xiaoxuan, 17, clocked 2:11.72 for victory, while her teammate Zhao Qibin celebrated a 23.60 win in the 50m butterfly.

Shanghai women's 4x100m medley quartet clocked 4:05.27 for victory.

Results at a glance:

Men

• 400m freestyle:
• 1, Sun Yang, Zhejiang, 3:43.97
• 2, Li Yunqi, Henan, 3:47.96
• 3, Wang Kecheng, Hunan, 3:52.77
• 50m backstroke:
• 1, Cheng Feiyi, Liaoning, 25.37 seconds
• 2= Xu Jiayu, Zhejiang, 25.67
• 2= Sun Xiaolei, Shanghai, 25.67
• 200m breaststroke:
• 1, Huang Chaosheng, Hunan, 2:12.67
• 2, Huang Yunkun, Guangzhou Army, 2:14.88
• 3, Lai Zhongjian, Chinese Navy, 2:15.56
• 50m butterfly:
• 1, Zhang Qibin, Shandong, 23.60
• 2, Wang Yuxin, Shandong, 24.26
• 3, Hu Chao, Jiangxi, 24.59
• 200m individual medley:
• 1, Zhang Fenglin, Shandong, 1:59.79
• 2, Yang Zhixian, Hunan, 2:01.03
• 3, Mao Feilian, Zhejiang, 2:01.10

Women:

• 400m freestyle:
• 1, Shao Yiwen, Zhejiang, 4:07.18
• 2, Pang Wenxian, Tianjin, 4:08.55
• 3, Xu Danlu, Ningxia, 4:08.57
• 200m backstroke:
• 1, Luan Xiaoxuan, Shandong, two minutes 11.72 seconds
• 2, Liao Yali, Hunan, 2:12.10
• 3, Li Yuan, Henan, 2:12.79
• 100m breaststroke:
• 1, Sun Ye, Shanghai, 1:08.84
• 2, Liu Xiaoyu, Liaoning, 1:09.05
• 3, Wu Yuele, Guangzhou Army, 1:09.44
• 4x100m medley relay:
• 1, Shanghai, 4:05.27
• 2, Zhejiang, 4:07.21
• 3, Guangdong, 4:07.39