Time and distance will pull apart the hearts that were close to each other. Time seems insignificant, but it is the thing that can change people and things most. Many times, people themselves become very different inadvertently, but sometimes people themselves can't find this change. In high school, my deskmate and I were friends who talked about everything. In class discussion, we will exchange experience in doing problems. During the break, we will talk about some interesting things that are happening now. We have no secrets, we trust each other absolutely, and we will ask each other for help whenever we encounter difficulties. After college, we seldom met. We are all busy making new friends and entering new circles, slowly forgetting each other's closest existence and just accepting all the new things in front of us. When we are unhappy, we will talk to new friends; I will also ask new friends for help when I encounter difficulties. The former person seems to stay in memory and become far away. When people stay in different circles for a long time, they often forget the environment in which they once lived, which is the nature that people easily choose life and life. People in the past only stayed in the past and did not participate in what happened in front of them. Slowly, others will take his place. Even keeping in touch is an awkward beginning and end. After a long time, they will gradually stop contacting each other. Differences in values lead to "lovers talk more." Zhang Ailing and Yan Ying were inseparable in college, and their relationship was as good as conjoined twins's. In Zhang Ailing's autobiographical novel little reunion, Jiu Li's mother is based on Yan Ying. They used to wear the same clothes and have a lot of topics. When they met, they had endless words. Later, Zhang Ailing went to the United States, and they separated, and still kept correspondence, but gradually, Zhang Ailing was very cold to Yan Ying. Zhang Ailing experienced ups and downs in her life, including glorious moments and down and out, which made her view of things more comprehensive and thorough, and she hoped that she would become better.