Wu Jingguo didn't have enough knowledge about Hell Prison. That was the truth. Even if he worked in the palace most of the time when he was still the Crown Prince of Wu Li, his father had never taken him to Hell Prison, probably thinking that it was unnecessary.
However, his father and brother were different from him because both of them had visited Hell Prison several times. As the Emperor of the empire, Wu Shun sometimes needed to check every building in the palace to ensure that each one was still functioning properly, including the Hell Prison. As for his brother, the red-robed man often captured dangerous criminals in the past, and sometimes those criminals were taken to Hell Prison. That was why Wu Jinhai was also quite familiar with the prison.
