Sir, i want get visa for business can tell me procedure and which documents are required for this ??

The invitation letter is compulsory, and you need to prepare two invitation letters. One is from your business partner in China, the other one is from a Duly Authorized Unit in China. In addition, you need to submit your passport and a copy of the passport's data page, a filled-out application form affixed with your color bare-headed photo, a guarantee letter from your company, your tax return form, a copy of your company's business license, your bank statement in latest six months, and round-trip tickets and hotel booking records if you go there for the first time.

After all the documents are prepared, go to the embassy to submit the application.