Du Yu
Also in 491, a project that Emperor Wu commissioned in 489—the revision of the penal statutes to eliminate contradictory provisions in the statutes written by the Jin officials Zhang Fei () and Du Yu—was completed, which greatly eliminated arbitrary and unfair enforcement of the laws. However, while Emperor Wu also ordered that the national university add a department for legal studies to eliminate the issue where officials were not familiar with penal laws, the order was not actually carried out.