I am always happy to help students. However, due to my limited time, I am only serve a reasonable number of students each year. Because there are a large amount of students requesting reference letter, I have to set the following criteria. If you satisfy the criteria and my time permits, I will try my best to help. If not, it’s difficult for me to give you strong support because I may not know you very well.
Research track: You have done substantial research with me or our team members. We discussed at least a few times so that I at least know something about you.
Learning track: You have taken my course and gotten an A from it. Meanwhile, you CGPA should be higher than 3.7. Sorry for the high bar here, but there are a huge amount of students requesting the letter. I can only serve very limited number of students.