One of your students, Li Ming, wants to study for the Master's Degree under the supervision of Professor Smith in an oversea university, you are asked to write a letter of recommendation for him in about 100 words. Do not sign your own name at the end of the letter. Use "Li Ming" instead.
You do not need to write the address.
Dear Prof. Smith,
I am writing to you to recommend one of my best students, Liu Ming, who wants to pursue his graduate study for a Master's Degree under your supervision.
Liu Ming was excellent student in our university as can be seen from his straight A grades on all subjects. He has passed the TOTEL test, indicating a good command of his English. More importantly, during the time he worked as my research assistant from July, 2010 to September, 2013, his had displayed great enthusiasm and intelligence on academic research.
I believe with his diligence, intelligence and great passion, Liu Ming has great potential in his future academic pursuits. Therefore, I recommend him to you without any reservation. I am ready to provide any further information upon your request.