When we were young, we desperately wanted to grow up, and only after growing up did we find that childhood was the most impeccable; When we read, we always dream of working. After working, we realize that it is the cold window time that we miss most; When we are single, we envy others for coming out in pairs. After marriage, we understand that the freedom of being single is also a kind of incomparable happiness... We are moving forward all the way, and we will miss it once we pass it. Only by cherishing the instant possession, will there be less regret and hatred in the memory of life.