It's a very sad novel, and it starts with a good time, where there's a happy family, parents, siblings, and they all get along very well. However, this family was soon destroyed by two incredibly easy events: The first incident was that his parents had to move to another city because of work, and his siblings had to move to another city to live. This incident was a huge challenge for the family, making the warmth and joy of the family helpless. The second incident was that the siblings quarreled and attacked each other due to the pressure of life and the desire for privacy. Some dangerous behaviors even occurred. The two groups eventually interacted for their own benefit, and the end result was that all kinds of sorrowful crimes were considered inevitable. In short, the story tells us that losing loved ones and losing warmth is a very painful thing. No matter how hard we try, we can't get back the warmth and joy of the past.