For some normal reasons about my country's study enviroment,I haven't connected to the outside world for years.But I'm a "special nut" among us--like exploring the funny world inappropriately.I have a bunch of hobbies.Except math,computer sicence,I also like thinking some philosophical questions,and sports like body training and table tennis.Usually,I kill my time by learning new knowledge,reading new books,doing sports,or playing games with my friends.Also,my behaviour model is keeping in changing,so maybe there isn't "usual" some time.