We always go back and forth. When I go to school, there are two points and one line between school and home, and when I go to work, there are three points and one line between company, home and entertainment venues. My life circle will shrink as we grow older as adults. We are always getting older, we are detached from society, alienated from our friends, until we shrink our life to our own home.
We are so alone and independent. Without love, we will no longer feel warm. We can only find comfort in the little pet beside us. Only when we hug it can we feel that we are no longer alone.
Since Yiyu is like this, his life is like a baby growing up. His circle slowly expands from a small crib to adulthood, and then slowly grows old and becomes lonely again.
He kept going back and forth, breaking up with the people around him and then attracting each other again. This repeated love made him painful. He hoped to surround himself with walls. Only when he was alone could he feel inner peace. Only in the end did he realize that even if he changed from a baby to an old man, his only life circle - home, was no longer the only one for him.