The requirements for China tourist visa application of American citizen are:
1.One completed visa application form with a recently taken passport photo stuck on it; all the items on the application form should be completed neatly with genuine information; false or incomplete information and illegible characters may lead to refusal of a visa.

2. your Original passport and Photocopy of your passport data page and all the Chinese visas.

3. round-trip flight tickets, hotel reservation

4. Nigerian residence permit

You may come to the Embassy every Monday, Wednesday or Friday (9am-17pm) with complete visa application documents required, for appointment of interview.