Chinese visa application??

What’s your purpose to PRC? If you go there for sightseeing, you should apply for a tourist L type. First, you should prepare those materials including your passport and copy of its data page, the completed application form attached with a passport-style photo taken recently, as well as accommodation booking record and round trip air tickets. Next, submit your application to the embassy of PRC and apply for it.

I need China business visa am from Nigeria.

If so, you should prepare those documents: your passport and copy of its data page, the completed application form affixed with a passport-style photo, and an invitation letter from your business partner in PRC.