Sun will compete in the 100m, 400m and 1,500m freestyle during the six-day event. "I just want to take this meet as training and preparation for the Asian Games," Sun said.
World champion Xu Jiayu stormed to 24.75 to take the men's 50m backstroke, while Wang Yichun of Shandong touched home first in the women's 50m butterfly 26.24.
"It was my second gold medal in two days. I had a bad cold since I arrived here, thus I did not perform my best and I was not happy with that," Xu said.
