One month later, Sun competed in the 2013 National Games of China. Aiming to become the first man to win seven gold medals at a single championship, he added to his range the 100 metre freestyle, an event typically reserved for sprinters. With the games holding the same schedule as the Olympics, he competed first in the 400 metre freestyle, winning in 3:43.68—over a second ahead of Hao Yun. The following day, Sun won the 4 × 100 metre freestyle relay, swimming the anchor leg in 48.14 seconds. He followed these performances the next day by setting a new Asian record in the 200 metre freestyle with a time of 1:44.47, about half a second faster than his time in London. The following day, he won bronze in the 100 metre freestyle, finishing with a time of 48.94 seconds, his first time finishing under 49 seconds.