Case of Xun Yan and Shi Gai Killing the Clan of Duke Xi and Banishing the Noble Sons

In 573 BC, shortly after the assassination of Duke Li of Jin (retroactively referred to as Duke Xi), powerful ministers Xun Yan and Shi Gai proposed a brutal consolidation of power. They demanded the execution of the late duke’s entire clan and the banishment of all other princely sons from the state. Their aim was to eliminate any potential avengers or rivals who could challenge the newly enthroned Duke Dao and the dominant noble families. Acting with military backing, the purge was carried out, destroying the direct lineage of the former ruler and scattering the ducal relatives. This event, recorded in the Zuo Tradition, exemplifies the fierce power struggles between the Jin ducal house and the rising ministerial clans during the Spring and Autumn period.

No formal trial occurred; it was a military-political decision enforced by the Xun and Shi factions. The proposal was approved and executed, resulting in the extermination of Duke Li’s relatives and the expulsion of the group of noble sons from the State of Jin.

Whether the massacre of the former duke’s clan and the mass expulsion of princely sons was a necessary act to secure political stability, or an unjustifiable usurpation that violated the ritual order and destroyed the legitimate bloodline of the ruling house.

The event severely weakened the ducal house and accelerated the transfer of power to the ministerial clans, setting a violent precedent for aristocratic purges. It further eroded the traditional clan-law (zongfa) system and contributed to the long-term political fragmentation that ultimately led to the partition of Jin into the Han, Zhao, and Wei states.