How to euphemistically ask university teachers to write letters of recommendation for themselves?

Give the professor an acceptable reason why he is good at it: you are very suitable for evaluating my ability in this field. For example, I asked a professor majoring in finance to help me write a recommendation letter for graduate students. This professor not only has high prestige and outstanding achievements in academic circles, but also has a very authoritative position. Moreover, you also discussed the financial topic in depth in the previous lecture. You can state your thoughts, for example, the professor can give me the most authoritative evaluation from a professional point of view, and his project assignments are also influenced by the teaching style of the professor. Are all reasons you can use. Don't forget to say a few words of praise.