He really wants to perfect Mandarin so that he can both speak to his Chinese fans, as well as make less errors while recording music.
He’s forgetful, so he’ll have to write things down (hence why his notebook is one of his favorite possessions).
He is one of the worst dancers in EXO, but that doesn’t necessarily mean he’s bad. He’s still an exceptional dancer, however, he knows that he has to become better.
