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Just like Bai Xue being sent to the mental hospital, the fire at Wang Yingzhi's villa appeared to be Bai Xue's doing on the surface, but it doesn't hold up to scrutiny.
The conflict between the two had lasted for decades, and although the resentment was deep, seen from another angle, if they had been willing to go so far as to kill each other, they would have done it long ago, not waiting until today.
First of all, Wang Yingzhi's admission that she had sent Bai Xue to the mental hospital was not credible; she was more like being manipulated by someone who exploited her weaknesses, guiding her step by step to do it.
Secondly, arson was something Sheng Yukai was good at.
Five years ago a villa burned down, five years later the Lishui Apartments burned, adding to the fire in the study of the Sheng residence...
All three incidents were done by Sheng Yukai, but he left loopholes in all three places, and Sheng Hanyu could soon find the evidence.