Zhang has made clear that the choice is up to Sun and the sports officials.
Sun has made a point of honoring both coaches.
After winning the 800m freestyle, Sun says Zhang has helped him improve his speed and recognized the coach's strategy in the race. But he didn't forget to express his gratitude to Zhu, who "greatly enhanced my ability with aerobic exercises".
"Both the coaches have brought up champions and have their own strengths," Sun says. He says he's not sure now which coach he wants to pair up with in the long run, "but I hope we can have more space to deal with it, as it is not only a matter for myself but also for Chinese swimming".
"I will consider it carefully and answer the question after the National Games," he says.
Shang Xiutang, deputy head of the swimming administrative center of the State sports authority, expected the public to be more tolerant about the young swimmer, and focus on his athletic result, instead of shortcomings.
Sports commentator Su Dong advises Sun to learn how to cope with the pressure of being the star from his predecessors.
"He is young and good-looking, but he was somewhat losing control after coming into fame since the Olympics.
"It's not easy to be an idol. Even for Yao Ming, Liu Xiang and Li Na, each trifle could be magnified, that's the price of being the focal point," he says. "As long as Sun is on that center stage, he should be careful of everything he does."
Day|Week|Month