Dear Sir,
I take pleasure in recommending to you Mr. XXX who hopes to attend your university for postgraduate studies. Mr. X graduated from the physics Department of Fudan University in Shanghai in XXXX and passed with honors in mathematics. I am of the opinion that he is qualified to carry on postgraduate studies in physics in general and electronics in particular in your university. I know him to have been a promising student of intelligence and ability. I strongly recommend him in his application. It will be greatly appreciated, if you will give Mr. X a chance to study in your university.
Truly yours,
(Signature)