The Case of Zhang Shizhi Trying the Offender of Violating the Imperial Passageway

During the reign of Emperor Wen of Han, a commoner suddenly emerged from under a bridge as the imperial procession was passing, startling the emperor's horses. The man was arrested and handed over to the Commandant of Justice, Zhang Shizhi. Zhang tried the case according to the law and sentenced the offender to a fine of four taels of gold for violating the imperial passageway. Emperor Wen was enraged by what he considered an unduly lenient punishment and demanded a heavier sentence. Zhang Shizhi steadfastly argued that the law is the public standard for the whole empire, and once established, it must be applied uniformly; deviating from it to satisfy the emperor's momentary anger would undermine the people's trust in the legal system. After reflection, Emperor Wen acknowledged the correctness of Zhang's decision.

Zhang Shizhi upheld the legal penalty of a fine of four taels of gold. Emperor Wen ultimately conceded and approved the sentence.

The core dispute centered on whether the punishment should follow the codified law (a fine) or be arbitrarily increased to death or severe mutilation at the emperor's personal demand, highlighting the fundamental tension between imperial will and judicial independence.

The case became a celebrated model of judicial fairness and the supremacy of law in Chinese history. It reinforced the principle that even the Son of Heaven must respect the established legal code, serving as a lasting symbol of judicial integrity and the importance of predictable, impartial justice in maintaining social order.