One must admit, there are few tenacious individuals, but they do exist.
For instance, the current Guardian, Shentu Han, of the Mire Sect.
Even though he had been apprehended by Pei Xuanjing, Xuanjing failed to extract much useful information from him.
Even with the assistance of Lin Qingyi, a captain in the Brocade Guards who had brought to bear their standard methods for interrogating an offender, they still couldn't get much information.
Of course, while they couldn't extract information from Shentu Han, his subordinates were less resistant. Xuanjing did obtain some information about the Mire Sect from them.
According to these individuals, they had come to Zhending Prefecture to meet with a significant figure, yet the specifics were known only to Shentu Han and remained unclear to them.
Xuanjing didn't care about these details as they mattered more to the Brocade Guards.
What he wanted to know was the structure of the Mire Sect and how many experts were in it.