Chairperson Dept. of Mechanical Engineering Clarkson University Potsdam, NY 13699 U.S.A. Dear Sir: At the request of Mr. Li, a graduate student of mine in the Department of Thermal Engineering, I am very pleased to write this letter of recommendation in support of his application for admission and financial aid for his study in your Department. I knew Mr. Li in January 1990, when I was the header of the Thermal Measurement Laboratory. We led a project and needed a research assistant. I contacted with the advisor of his class and wanted to choose an excellent student to take part in it. She recommended Mr. Li to me because of his exceptional achievement in his class. So Mr. Li came to our research group to finish his diploma project under my instruction. In the diploma project, his serious attitude and diligence made a favorable impression on me. At last, he completed high quality paper? “The Mathematical Model of Heat –Exchange Cycle In Large Scale Fossil Power Plant” which earned a high grade 90.