You don't need to book a time and day before you come to the embassy if you want to use one day visa service. If an application is submitted before 12:00 noon, you may ask for expedited service. Consuls will make the decision depending on the quantity of applications of that day. Since it taks some time to process visas, same day rush visas are generally picked up about 2:30pm.

The requirements for a business visa application are:
1. One completely filled out Visa Application Form for the P.R. China
2. One recently taken 2X2 in. photo
3. Original passport with at least 2 blank visa pages and valid for at least 6 months beyond the date of application.
4. For single-entry or two-entry business visa, an invitation from the relevant Chinese governmental departments, relevant companies, business entities or non-profit governmental organizations is required.