| Roles | Competed in Olympic Games • Competed in Youth Olympic Games |
|---|---|
| Sex | Male |
| Full name | Dai•Jun |
| Used name | Dai•Jun |
| Name order | Oriental |
| Original name | 戴•骏 |
| Born | 6 February 1992 in Shanghai, Shanghai (CHN) |
| Measurements | 181 cm / 75 kg |
| Affiliations | Shanghai Province Swimming Team, Shanghai, CHN |
| NOC | People's Republic of China |
| Medals | OG | YOG |
| Gold | 0 | 1 |
| Silver | 0 | 1 |
| Bronze | 1 | 0 |
| Total | 1 | 2 |
| Games | Discipline (Sport) / Event | NOC / Team | Pos | Medal | As | |
|---|---|---|---|---|---|---|
| 2010 Summer Youth Olympics | Swimming (Aquatics) | CHN |
Dai Jun | |||
| 200 metres Freestyle, Boys (YOG) | 6 | |||||
| 400 metres Freestyle, Boys (YOG) | 1 | Gold | ||||
| 4 × 100 metres Freestyle Relay, Boys (YOG) | People's Republic of China | 2 | Silver | |||
| 4 × 100 metres Medley Relay, Boys (YOG) | People's Republic of China | 4 | ||||
| 2012 Summer Olympics | Swimming (Aquatics) | CHN |
Dai Jun | |||
| 1,500 metres Freestyle, Men (Olympic) | 15 | |||||
| 4 × 200 metres Freestyle Relay, Men (Olympic) | People's Republic of China | 3 | Bronze |