In the betrayal of Doudou, Song Yigang knew that he was dead, and Jay would not live. Why did he choose to die?

In the novel The Betrayal of Peas, Song Yigang knew that his choice would lead to Jay's death, but he chose death because:

First of all, Song Yigang realized that his betrayal had brought great pain and suffering to Doudou, and he felt very guilty. He chose death to alleviate the pain and suffering of Doudou, so that he would not be hurt again.

Secondly, Song Yigen was deeply aware of his mistakes and crimes, and he realized that he had to bear the corresponding consequences and punishments. He chose death because he wanted to atone with his life and express his punishment and repentance.

Finally, Song Yigang may realize that Jay won't forgive his betrayal, and no matter what he does, he can't save this relationship. So he chose death and expressed his despair and helplessness in this relationship with his own actions.

To sum up, Song Yigen's choice of death is based on a variety of complex emotions and thoughts. He wants to relieve the pain of Doudou, express his punishment and repentance, and express his despair and helplessness to Jie.