It depends on your ability. If you happen to have nothing to do and think this classmate is not bad, go and accompany him, lead the way to interesting places, and enhance your feelings by the way. If you are in a good mood, just be generous and invite you to dinner. What? Think you AA stingy, of course you want to treat? Then you don't know him. We are all students, holding our parents' money. Are you going to travel at your own expense? In other cases, I usually give it to him on WeChat at most; Shao introduced interesting and delicious places. Interpersonal communication is not how much you pay, but how much you have the ability to provide.