i want to know about the bussinese visa for china , i am from pakistan ?

sir my name is mohsin and i am looking for teaching job in china, i need to know that am i eligilble to work in china ? i asked few chinese friends about the teaching job , they assure me that they will find a teaching job for me but there is problem with pakistani peoples to go china on work or bussines visa? i need to know that can some chinese school or chinese person or chinese requritment agency able to send me work visa ? please guide me with this problem.