 Complete the following phrase:  In August 2018, Sun competed in every freestyle event from the 200 to the 1500 metre freestyle at the Asian Games. He also competed in the 4 × 100 and 4 × 200 metre freestyle relay events. In the 200 metre freestyle, Sun won gold with a time of 1:45.43. He finished 1st in the 400 metre freestyle with a time of 3:42.92, over four seconds ahead of runner-up Naito Ehara. By beating Hortons time of 3:43.76 from the 