Yang Tinghe holds a great secret. That was Bai Xiaosheng's assumption.
Because when everyone believed the other party was trapped in the forbidden blessed land, it was extraordinary that the Blood Demon not only mysteriously got out, but also didn't return to the Demonic Cult. Instead, the Blood Demon hid here, which seemed very peculiar.
Originally, Bai Xiaosheng was oblivious to this matter. Even when Yang Tinghe's actions were a bit abnormal during the turmoil in Tiandu, it did not raise his suspicion.
Only after Pei Xuanjing killed the Seven Kills Sword Master, and had a conflict with the Demonic Cult, did Bai Xiaosheng pay special attention to the Cult's affairs. Upon realizing the strange actions of the Sky Demon Sect's leader, Xue Wuheng, in Tiandu, he traced back to discover the true identity of Yang Tinghe.