Obtaining Chinese visa for 6 days.

At this website, you can find invitation sample, just follow the sample to write the invitation. If you want to apply for a business M type, you need to show your passport and copy of its data page, the completed application form attached with a passport-style photo, hotel reservation, flight itinerary, an invitation letter of a duly authorized unit, and the invitation letter from the Chinese partner, your bank statement, your company’s business registration certificate, and an introduction letter of your company.