What kind of visa do I need to travel to china for doing language course/TEFEL course

I,Mukta Roraman a ordinary student of Bangladesh would like to inform you that I am really interesting to do chanise Language course and TEFEL course on 2012.Therefore, I am in need of your kind assistance and co-peration regarding how to get visa and waht documents do I need to issue visa as soon as Possible please.

Best Regard,
Mukta Roraman