Although their love was painful and entangled, it was still love. It was Bei Jiang's love, and she simply didn't understand love at all.
Later, the biggest difference Nan Fei discerned was Zhuanzhuan.
The Zhuanzhuan from before her rebirth and after were worlds apart. The former was the obedient girl next door, a precious little sister for whom she had given her all. The post-rebirth Zhuanzhuan, however, was deep and unpredictable, employing cunning and ruthless tactics that were inscrutable.
She was even an extreme murderer, with significant psychological issues.
Through this clue, Nan Fei finally recalled a detail she had once forgotten. In her past life, Zhuanzhuan had a small box, nothing special or pretty. Inside were assorted items like hair rubber bands, buttons, and the like.
Zhuanzhuan treasured that little box, taking it wherever she went.