First, the distance is too far. As we all know, most people like to keep in touch with people who often live together and have close ties with each other. After graduating from college, everyone is scattered all over the world. If the relationship is normal, there won't be much overlap and no connection after college.

Second, there is no * * * topic. After college, everyone started their own lives. People always look forward, and few people always recall the past. After going to college, we don't have the same topic, so we naturally have less contact.

Third, everyone is busy. After college, everyone should be busy with their own affairs, and there are fewer factors for strong ties with former classmates. In this case, everyone tends to contact their current classmates, not their former classmates. Since I went to college, I have little contact with my former classmates. First, because of the distance, second, because there are few topics, and third, because everyone is busy. I really don't have that much time to contact them again. After all, our energy is limited. However, when we get home, we will still contact, chat and go out to eat together.