My sister went to tell my fortune, and the fortune teller said that I would not live to be 40 years old. . . It's pretty depressing. . . What makes her say that I won't live past 40? !

Fortune telling is just psychological comfort, the so-called prediction of future life. This cannot be inferred by common sense. If he says that someone can live for a hundred years, can he live for a hundred years if he is killed today? It's a wild guess and delusion about the future. Don't take it seriously. You just need to live a stable life.