Yes, you can get the business visa within 3 days if you apply for express service.
the requirements are below:
1. Applicant's passport with blank pages and at least 6 months validity left before expiration.
2.A truly and completely filled application form affixed with one passport-sized photo.
3. A Visa Notification Form issued by Chinese authorized unit.
4. Round-trip air ticket
5. Hotel reservation.
6.Other documents required by the visa officers if necessary.
I guess the embassy will open on October 9.