Incarnating as Sun Ang, infiltrating the Headquarters of the Law Enforcement Hall, the primary goal was not really about the Yan Fajue.
It was indeed to hide himself.
According to the information obtained so far, the Ten Thousand Immortal Alliance managed the cultivators guarding the Yan Fajue very strictly.
Not only did one's background need to be clear and clean, but they also typically selected from families that had been part of the Law Enforcement Hall for generations.
Before joining, one had to undergo a strict review.
Moreover, a more critical point was that once chosen to guard the Yan Fajue, it meant one was not allowed to step out of the Law Enforcement Hall headquarters for three hundred years.
While guarding, one also became a prisoner.
Thus, among the major hereditary families of the Law Enforcement Hall, basically, no one would voluntarily undertake this arduous task.
Even if the compensation for the task was substantial.