I am pakistan passport holder and i have permint residence of republic uzbekistan

If you go to China for business purpose, you need to apply for a business M type. Those documents are needed: your passport and copy of its data page, a fully filled-out application form affixed with a bareheaded color photo, your residence permit in Uzbekistan, an invitation letter from your business partner, and an invitation of a duly authorized unit, your recent bank statement, round trip air tickets and hotel reservation, as well as other documents the consular officers consider necessary.