I want to recognize him as my teacher. What should I say?

For example, "Brother (as you said), I really admire your skills. Your skills are really good, so I want to learn from you! Please accept me as an apprentice! ! "

It's best to talk about this with his character. For example, if he is a serious person, he should use a serious tone, and it is best to bow to him after he has finished speaking. If he is a humorous person, he can speak in a humorous and relaxed tone, like the above paragraph.

It depends!