Simplify the following text for a Grade 7 native English-speaking person.
Original: Park Kun-Ha ( born 25 July 1971 in Daejeon , South Korea ) is a retired South Korean footballer and the coach of South Korea national under-23 football team .
Simplified: Park Kun-Ha ( born 25 July 1971 ) is a former South Korean football player . He has played for Korea Republic national team .