Simplify the following text for a Grade 9 native English-speaking person.
Original: Park Ji-Sung ( Hangul : ë ì ì ; Hanja : æ æ æ ; ; born 25 February 1981 ) is a South Korean footballer who currently plays as a midfielder for Manchester United , and was the captain of the South Korean national team .
Simplified: Park Ji-Sung ( born 25 February , 1981 ) is a South Korean football player . He plays for Manchester United and Korea Republic national team .