Xu Xiyan cried really hard after she filmed that part. She could feel how desperate and helpless her mother had felt.
Even though two people loved each other so much, they couldn't be together because of many reasons.
Jing Ruyue loved Feng very much but was forced to leave him because of her problem.
In the film, the two of them quarreled, and the male protagonist turned to leave, leaving the female protagonist crying while staring at the man leaving her.
The pain that she felt was 10 times worse than he could ever feel, especially when she knew that she had his child in her belly.
The scene ended, and Xu Xiyan was depressed for a long time.
She could always get in and out of her characters easily, and it was her first time not being able to get out of one right after the filming had ended.
The most reasonable explanation she could think of was because she was playing her mother.