Sun qualified for the 2016 PDC World Darts Championship after winning the Greater China Qualifier.[1] He played Mick McGowan in the preliminary round, but won only one leg and was beaten by two sets to nil.[2] Sun returned a year later after again winning the Chinese Qualifier.[3] He met Australian Corey Cadby in the preliminary round and lost 2–0, with Cadby producing a record prelim average of 102.48, over 30 points higher than Sun's.[4]
World Championship results
PDC
2016: Preliminary round: (lost to Mick McGowan 0–2)
2017: Preliminary round: (lost to Corey Cadby 0–2)