The Case of Cui Cheng and Cui Qiang Killing Dongguo Yan and Tang Wujiu, and Qing Feng Annihilating the Cui Clan

In the State of Qi, the powerful minister Cui Zhu had two sons from a previous marriage, Cui Cheng and Cui Qiang, and a younger son, Cui Ming, from his new wife Dongguo Jiang. After Cui Zhu established Duke Jing, a succession conflict arose. Dongguo Yan (Cui Ming's uncle) and Tang Wujiu (the family steward) supported Cui Ming as heir. In 546 BC, with Cui Zhu’s tacit consent, the resentful Cui Cheng and Cui Qiang killed Dongguo Yan and Tang Wujiu, plunging the Cui household into chaos. Seizing the opportunity, another noble, Qing Feng, feigned mediation, instigated further strife, and then attacked the Cui estate on the pretext of quelling a rebellion. Qing Feng killed Cui Cheng and Cui Qiang, forced Cui Zhu to commit suicide, and systematically exterminated the entire Cui clan, leaving only Cui Ming to flee to Lu. Subsequently, Qing Feng usurped total control of Qi alongside the state.

There was no formal trial in the legal sense typical of the Spring and Autumn period. The outcome was a violent extrajudicial resolution: the entire Cui clan was massacred by Qing Feng, with the patriarch Cui Zhu driven to suicide. Qing Feng briefly became the de facto dictator of Qi before eventually being overthrown, exiled, and executed by other noble families.

Whether Qing Feng’s actions constituted legitimate intervention to quell a chaotic internal conflict or a calculated act of treachery and premeditated usurpation, exploiting a family feud to annihilate a rival political clan and seize power.

The annihilation of the Cui clan marked a brutal escalation in the power struggles among Qi's noble houses. It demonstrated the complete breakdown of Zhou feudal order ("rites and music collapsing") and the triumph of violent factionalism. The event destabilized Qi's political structure, leading to Qing Feng’s own tyranny and eventual downfall, and served as a stark cautionary tale in Chinese history about the cyclical nature of vengeance and the dangers of unchecked aristocratic ambition.