A friend of mine recently told me a story about his personal experience over drinks. Here, I call my friend "Xinfeng", which is easy to remember. What needs to be explained clearly are his two childhood friends, namely Haizi and Ah Mao in the article. Haizi is a close friend of mine. Our fathers joined the army together and later transferred to work in this city. Even so, I have never met Haizi. I only heard about his death from my father. I got to know Ah Mao through Ding Ding, only once or twice. His family's situation changed from bad to good, and he became addicted to drugs and died from drugs. The story is very good, but I don't know if I can express it well. If not, please just laugh it off.