Case of Zhao Yang and Xun Yin Casting the Penal Tripod and Inscribing Fan Xuanzi's Penal Code

In 513 BC, Jin state officials Zhao Yang and Xun Yin cast a large iron tripod inscribed with the penal code authored by Fan Xuanzi. This act, following Zichan’s casting of penal tripods in Zheng, was the second recorded instance of making written law public in ancient China. The inscription exposed laws that had previously been monopolized by the nobility, signaling a shift toward legal transparency. The move provoked fierce opposition from conservative thinkers like Confucius and historian Cai Shimo, who argued that publicizing laws would erode the hierarchical social order based on Zhou rituals, encourage litigation, and cause the lower classes to abandon deference to aristocrats in favor of legal loopholes. Despite the controversy, the tripod was publicly erected.

There was no formal trial; the event was an act of legislative publication carried out by the state officials. Despite strong philosophical opposition, the penal code was publicly inscribed and displayed, representing a de facto acceptance of written law. The historical outcome favored the movement toward codification, though the act remained deeply controversial in its time.

Whether publicizing written law would destroy the traditional ritual-based social hierarchy and lead to moral decay and disorder, or whether it would promote justice, accountability, and the rule of law beyond aristocratic discretion.

The casting of the penal tripod marked a pivotal moment in the decline of the Zhou ritual order and the emergence of Legalist thought. It set a precedent for the public dissemination of laws, influencing later legal reforms in other Warring States and contributing to the eventual codification of law in imperial China. The incident ignited enduring debates over the balance between ritual governance and formal law, shaping Chinese legal philosophy for centuries.