Hi, I am expartriate working in Nigeria looking for the Business Visa to attend exhibition.

Hi, you need to apply for M type. Following documents are required:
1, One completed application form (V. 2013) with a recently taken passport photo stuck on it;
2, Photocopy of your passport data page, the passport should be with at least six months of remaining validity and two blank pages.
3, Original invitation letter of duly authorized unit or confirmation letter of invitation issued by the Chinese government departments, companies and social organizations authorized by the Chinese Foreign Ministry.
4, Invitation letter issued by a trade partner in China. The invitation letter should contain:

a) Information about yourself (full name, gender, date of birth, etc.)
b) Information on the planned visit (purpose of visit, arrival and departure dates, places to be visited, relations between your and the inviting entity or individual, financial source for expenditures)
c) Information on the inviting entity or individual (name, contact telephone number, address, official stamp, signature of the legal representative or the inviting individual)

5, One formal introduction letter from your company to tell your identity, the purpose of visit to China, and supposed duration of stay in China.
6, Photocopy of your certificate of incorporation.
7, Latest six months' bank statement of account with at least 4 million Naira in deposit if you apply for Chinese visa for the first time.