Because the technology was not very developed before, most of the students at that time didn't have mobile phones, and the button-type mobile phones that wealthy families bought for their children could only send messages by phone. But children don't necessarily have a phone at home if they have a mobile phone, so if you want to contact your parents, you have to tell them in advance. They will be called at a certain time on a certain day, and then parents will wait for their children's calls at the designated place within the specified time.
At that time, college students also had a lot of leisure time, but without mobile phones, they would have their own ways to pass the time. Especially for girls, the favorite thing to do is to knit sweaters in the dormitory. At that time, they knitted faster than anyone.
At that time, they also liked to gossip and ask their roommates who liked this and who liked that. However, girls at that time especially liked and worshipped soldiers. If a college student who is a soldier takes a fancy to them, he is sure to catch up with them.