Having discerned the reason for their visit, Shen Mianmian finally realized why Cheng Xining burst into such a rage upon seeing her. Simply put, Cheng Xining knew that there was news about Ruan Yiqian's sister and felt threatened, using her to let off steam.
When you think about it, it seems she's somewhat wronged.
After the police talked with Ruan Yiqian, they arranged for everyone to sit and wait for a while and then left. About half an hour later, he returned from outside.
Accompanying him were a couple, and following behind the couple was a young girl. Perhaps she was shy with strangers, she stood behind them with her head lowered, and from their point of view, they could only see the top of the girl's head.
Ruan Yiqian, who usually appeared very composed, was also somewhat excited. He stood up and stared intently at the people behind the couple.