I have a friend ( not very close ) who is very good at football. One day he saw that I played badly, so he came up to teach me. After teaching, I really made progress. Later, someone asked me, are you very close to him? I said no, and then he said, he is very kind to you. He has taught you for 5 hours. After that, I was shocked. I thought about whether to make friends with him or thank him