During the reign of Renzong in the Northern Song Dynasty, things were peaceful on the surface (there were many tiles and houses in Bianliang, Tokyo, and water transportation was busy), but in reality there were undercurrents - the prince and King Yan competed for the throne, the civil service group competed with foreign relatives, the Western Xia border was eyeing the border, local powerful people colluded with officials, and it was difficult for the people at the bottom to redress their grievances, which provided the soil for suspense cases and power struggles.
