I am a Nigeria passport holder schooling at a University in UK.

I applied for an internship at CRCC Asia Internship Program and got a reply that i am good candidate, but it might be impossible to process visas for China for Nigerian passport holder from their past experiences. However, they added that they would be unable to obtain government issued invitation letters (letters from a duly authorized unit), which i need since i'm Nigerian and that if i decide to pursue the application myself and i'm offered a place please i would be refunded before committing to the program. The type i need is the F. Please what do you advise i do.