I want to know the requirement to obtain a business visa, procedure and how long it takes to apply?

First, you need to prepare the following documents:
1. your passport with a validity of at least six months and two blank pages and a copy of your passport information page
2. filled application form
3. invitation letter issued by duly authorized Chinese unit. It can be acquired with the help of your Chinese trade company
4. invitation letter from your Chinese trade company
5. introduction letter from your company
6. copy of your company's business license
7. recent six months bank statement. You should have at least 4 million Naira inyour account if you come to PRC for the first time.

Second, you should bring all these documents to submit in the afternoon on Tuesday and Thursday (15:00 to 17:00) and make an appointment.

Third, if your application is taken, you need to come to the embassy again on the appointed date for an interview.

Last, you can collect your visa on or two weeks after your interview.