A school in china is hiring me as english teacher . I am a Pakistani. what's procedure to get visa?

Before you apply for the work Z type, you need to get an invitation letter from duly authorized unit as well as a work license. Your school should be responsible for getting you these two documents. After that, you need to obtain a medical report from one of the designated hospitals. Then take your passport, passport copy, a filled-out application form, a recent photo along with the invitation letter, work license, and medical report to the consular office to apply for the Z type.