My own understanding: First of all, Lang Dan has realized that jewelry is stolen goods betrayed by his wife. However, in the face of this betrayal of love, he is like a treasure. Imagine if his wife left him a child instead of someone else's jewelry. Second, his joy swept away his sadness after his wife died. How much humanity is mixed with this joy? There seems to be nothing. It's disgusting. This is no longer a normal reaction after a person's ethics and love have been hit hard. This is an extremely morbid state! Thirdly, after he got the money, his personality weakness can also be seen through his series of behaviors. He has no long-term plan, no plan or even a lot of mental preparation, which is doomed that this person will not make great achievements in the future. Maybe, when he was drinking the 20-franc bottle, he was also drinking his wife's blood! Fourth, his own observation of people is extremely limited. It's a tragedy that my wife who has been cheating for so long knows nothing about it! Considering his age, I wonder if he is too confident in his wife and marriage, or too confident in his present situation. So that's it, alas! He is so self-righteous! Hehe, in fact, the French are extremely open to sex, especially at that time, many celebrities had affairs, so I won't say much about his wife's infidelity, which is normal! That's all. I read this short story two years ago. That's all I remember. Try to give points, man. I tried my best.