How does is cost x visa for study in china

Good day to you and greeting, I am Ali Suliman Abdalla Ibrahim from Sudan I have been accepted for full China scholarship in Huazhong Agricultural University in 2012 please kindly I want how does is cost fast (x) visa for study in china and how many days for process I shall be very grateful if you kindly your earliest response to this letter will be appreciated. Please accept my sincere thanks and gratitude