The required documents should be provided for Business Visa Application are:
1. an invitation letter from the mainland company and the registration license of this company.
2. Visa Notification Sheet from an authorized government unit, such as Foreign Affaires Office in China, this document should be applied by the mainland company.
3. Your valid actual passport.
4. One completed Visa Application Form with one additional passport photo (black & white or color is acceptable).
5. sometimes, the travel documents will be required, such as hotel reservation, two-way flight tickets.