Simplify the following text for a Grade 7 native English-speaking person.
Original: Hanja-mal or hanja-eo refers to words which can be written with hanja , and hanmun refers to Classical Chinese writing , although `` hanja '' is sometimes used loosely to encompass these other concepts .
Simplified: Hanja-mal or hanja-eo is about words which can be written with hanja . Hanmun ( í ë ) is about the Chinese Classical writing , but hanja can sometimes be used to generally mean hanmun too .