if you want to get the Business Visa (F visa) to visit exposition 2010 and do business in China, you have to prepare the below documents:
1. the invitation letter from the inviting unit
2. the visa notification letter from the authorized Chinese governmental unit, the host company in China should get this document for you
3. A valid passport as well as a copy of its information page: Your valid passport must have at least six (6) months of remaining validity and at least one blank visa page in it.
4.Application form: One completed Visa Application Form
5.Photo: one recent photo of 2x2 squre inch (black & white or color is acceptable) glued or stapled on the application form.