The Championship outfit confirmed the transfer of the 28-year-old South Korean forward on their official Twitter account.
Meanwhile, Watford have sent Brazilian midfielder Iriney on loan to Real Mallorca until the summer.
Giuseppe Sannino's side are currently 16th in the league table with 31 points from 26 matches.
Restore Data
| Team | P | W | D | L | F | A | GD | PTS | |
| 1 | Liverpool | 12 | 10 | 1 | 1 | 24 | 8 | 16 | 31 |
| 2 | Arsenal | 13 | 7 | 4 | 2 | 26 | 14 | 12 | 25 |
| 3 | Manchester CityMan City | 12 | 7 | 2 | 3 | 22 | 17 | 5 | 23 |
| 4 | Brighton & Hove AlbionBrighton | 13 | 6 | 5 | 2 | 22 | 17 | 5 | 23 |
| 5 | Chelsea | 12 | 6 | 4 | 2 | 23 | 14 | 9 | 22 |
| 6 | Nottingham ForestNott'm Forest | 13 | 6 | 4 | 3 | 16 | 13 | 3 | 22 |
| 7 | Brentford | 13 | 6 | 2 | 5 | 26 | 23 | 3 | 20 |
| 8 | Tottenham HotspurSpurs | 12 | 6 | 1 | 5 | 27 | 13 | 14 | 19 |
| 9 | Aston Villa | 12 | 5 | 4 | 3 | 19 | 19 | 0 | 19 |
| 10 | Newcastle UnitedNewcastle | 13 | 5 | 4 | 4 | 14 | 14 | 0 | 19 |
| 11 | Bournemouth | 13 | 5 | 3 | 5 | 20 | 19 | 1 | 18 |
| 12 | Fulham | 12 | 5 | 3 | 4 | 17 | 17 | 0 | 18 |
| 13 | Manchester UnitedMan Utd | 12 | 4 | 4 | 4 | 13 | 13 | 0 | 16 |
| 14 | West Ham UnitedWest Ham | 13 | 4 | 3 | 6 | 17 | 24 | -7 | 15 |
| 15 | Everton | 12 | 2 | 5 | 5 | 10 | 17 | -7 | 11 |
| 16 | Leicester CityLeicester | 13 | 2 | 4 | 7 | 16 | 27 | -11 | 10 |
| 17 | Crystal Palace | 13 | 1 | 6 | 6 | 11 | 18 | -7 | 9 |
| 18 | Wolverhampton WanderersWolves | 13 | 2 | 3 | 8 | 22 | 32 | -10 | 9 |
| 19 | Ipswich TownIpswich | 13 | 1 | 6 | 6 | 13 | 24 | -11 | 9 |
| 20 | Southampton | 13 | 1 | 2 | 10 | 10 | 25 | -15 | 5 |
| > Premier League Full Table | |||||||||
