The Case of Zhang Shizhi Impeaching the Crown Prince

During Emperor Wen's reign, Crown Prince Liu Qi and his brother Prince Liu Wu entered the Sima Gate of the imperial palace without dismounting from their chariot, a direct violation of ritual protocol and imperial law. Zhang Shizhi, then Commandant of Justice, pursued and detained them, formally impeaching the crown prince for showing disrespect to the court by not dismounting at the palace gate. Emperor Wen, acknowledging the breach, removed his ceremonial cap and apologized on behalf of his sons. Empress Dowager Bo later issued a pardon, allowing the princes to enter. Zhang Shizhi’s actions tested whether imperial family members were subject to the same legal standards as common subjects.

Zhang Shizhi’s impeachment was procedurally valid. Emperor Wen publicly acknowledged the transgression and apologized. The crown prince was eventually pardoned through the intervention of Empress Dowager Bo, but the legal principle that even the heir to the throne was not above the law was affirmed. Zhang Shizhi was later promoted and held in high regard by Emperor Wen.

Whether the crown prince, as heir apparent, could be held legally accountable under the same laws that applied to ordinary citizens, and whether a judicial official had the authority to impeach him without facing imperial retaliation.

The case became a celebrated example of judicial integrity and the principle of equality before the law in Chinese legal history. It reinforced the notion that even the emperor's family should observe state regulations, strengthening the rule of law. Zhang Shizhi’s courage was praised by later generations as a model for upright officials, influencing Confucian and legalist thought on the limits of imperial privilege.