Gu Zhang could sense Xingren's nervousness and the way she panicked when Han Zihao talked about bringing the CCTV footage.
He is not stupid. He is running the Gu enterprises for years, so he knows how to assess the situation. If Xingren is innocent, then she would not have reacted like this.
If she has not done anything, then she would not mind if Han Zihao brought the CCTV footage. She should be glad for Han Zihao to offer a solution to bring the footage, this will prove her innocence after all.
However, he couldn't ask her about this in front of Xu Nuan. He accepts it or not, he still treats Xu Nuan as an outsider and never really believed that she is his biological daughter.
He is just fulfilling his duty by keeping Xu Nuan in the house since his father brought her back from the orphanage. He has no option other than to take her in.
