Simplify the following text for a Grade 7 native English-speaking person.
Original: Ko Jeong-Woon ( born June 27 , 1966 in Wanju , Jeonbuk , Korea Republic ) is a retired South Korean football player .
Simplified: Ko Jeong-Woon ( born 27 June 1966 ) is a former South Korean football player . He has played for Korea Republic national team .