 Complete the following phrase:  Sun competed for China at the 2008 Summer Olympics. In 2010, he won the 1500 metre freestyle at the Asian Games, setting a new Asian record. At the 2011 World Championships, he beat the 1500 metre freestyle world record, which was previously held by Grant Hackett in 2001 and the longest-held world record in swimming at the time. Sun won gold medals in the 