The Great Yi Supervisory Bureau is a secret organization of the Great Yi Dynasty, responsible for monitoring all officials, citizens, and cultivators under the heavens. It has the authority to investigate, interrogate, record, and judge. Essentially, it is much like the Brocade-clad Guard of the Ming Dynasty, but of course, with even greater power. The Supervisory Bureau does not only monitor officials and the people at large, but even the World Sects are under their surveillance.
The Bureau is clouded with experts who employ extremely bloody and spicy methods, with countless varieties of evil techniques. Even the most cruel sects of the Demon Path are not as fearsome as them. Over thousands of years, the name of the Supervisory Bureau has become a taboo. Yan Moshan had only recently learned of its existence, and the secrecy of the Supervisory Bureau even surpasses that of Lingyan Pavilion, the Royal Elder Group, and Jixia Academy.