Crystal Palace are believed to have agreed an initial £1.25m deal with Bolton Wanderers for Lee Chung-Yong.
According to Bolton fansite Lion of Vienna Suite, they have informed by a "trusted source" that a fee has been agreed and it could rise to £2.5m.
Chung-Yong recently returned from the Asia Cup tournament early due to injury, but Palace have been linked with the attacking midfielder for the past month.