Kammala jumla mai zuwa: A Wasannin Olympics na bazara na 2016, Sun ya lashe tseren mita 200 tare da lokacin 1:44.65, ya kammala 0.55 seconds a gaban mai tsere na biyu Chad le Clos. Wannan shine babban taken farko na Sun a wannan taron, kuma ya zama dan wasan China na farko da ya lashe lambar zinare a wannan taron. Ya lashe lambar azurfa a tseren mita 400 na kyauta tare da lokacin 3:41.68, ya gama da dakika 0.13 a bayan Mack Horton na Ostiraliya. Sun ya kammala na 16 a wasannin share fage na
Tsakanin mita 1500 na 'yanci, a cikin 15:01.97. Tare da lambar zinare ta mita 200 da lambar zinare ta mita 400 da 1500 daga Wasannin Olympics na bazara na 2012, Sun ya zama dan wasa na farko a tarihi da ya lashe lambar zinare ta Olympics a wasannin 200, 400, da 1500 na mita.