C126 Fraudulent Interrogation.

"Then you are the only one who can do it. How can ordinary policemen do it? And you can't even learn it," Lin Tingting said enviously.

"What are you envying? I can't remember now. If I remember, I can teach you," Yang Xuan said with a frown.

While Yang Xuan was chatting with Lin Tingting, a person seemed to flash across his mind. It was an old man with white hair and beard