STUDENT VISA REFUSAL

I have been refused a student X application to study in China without any reason given to me by the Chinese Embassy at Lagos, Nigeria on 10/10/2018. Please is there any way I can appeal against this decision of my student X refusal cos the university where I intend to study had already accepted my application to study and expect to see me on or before 20/10/2018.. Please can somebody help me out cos I am running out of time???