Last summer, Yan Yu tied up his fiancée and beat her up under a tree. He was in the army, and when he received the news, he quickly rushed to the scene of the accident. From afar, he heard Yan Shuyi say to the woman, "He's someone who can use a belt for five years. He's someone I can't bear to hurt even if I'm angry! He's busy with his work and has little time to go home. Yet, you take his money to support a pretty boy without any restraint?"
She hit her not because she was jealous, but because she felt unfair towards him.
At that moment, Sha Zelong realized that this woman might really like him.
The real reason why he believed in Yan Yu was because of something else.
After canceling the engagement with his fiancée, he had sex with Yan Yu.