While Lu Shu was listening to Yu Fuyao, he suddenly realized that there was some important information.
Wen Zaifou seemed to be investigating something. If not, why would he have captured Yu Fuyao's patrons? Furthermore, he had caught three of them.
Earlier, when Wen Zaifou said that he was not the mastermind behind the scenes, Lu Shu did not fully trust him. After all, even though he could read their expressions, he would never truly know their intentions. Even if he was good in the past, he might have changed, like Duanmu Huangqi. Zhang Weiyu said that although Duanmu Huangqi was ambitious in the past, he was very loyal. He knew his limits.
He was very different from who he was now. He dared to commit a massacre in the palace.
Thus, Lu Shu did not completely trust anyone. This was a struggle for power. One could not advance simply with one's intuition.
He was being responsible for himself by remaining doubtful.