May be I would get an invitation, want to go to China for business purpose

You can apply for business M type from the Chinese embassy. First, you should provide your passport and copy of its data page, the completed application form attached with 2 passport-style photos, the invitation letter of duly authorized unit, letter of undertaking from your company, tax certificate, copy of your company's business license, bank statement and the invitation letter from the Chinese business partner, as well as other required documents. Next, submit the application to the embassy.