How can i apply tourist visa for china for me and how much n want to go by bus from Nepal how??

Dear sir i am a Nepali boy n never travel abroad so i want to travel first to my neighbour country China, right now m at kathmandu. I want to enter china by Bus ,is it possible how??. I want to travel single for visit purpose to learn new culture and tradition. i am 22 yrs old boy. pls suggest me details.