I'm soon going to study in chiina,what type of visa is applicable to my WIFE? and can i go with her?

Suleiman, usually people like your wife can apply S type to stay with their husband or wife in China. However, it seems that Nigerians can not apply S type. M, X1, X2, Z and F are avaiable. However, I am afraid that it's difficult for your wife to acquire M, Z and F type. If you really want your wife to come to China with you, you may help her acquire an X type.