Case of Wei Chancellor Zhai Qiang's Death and Prince Jin's Contention for the Chancellorship

After the death of Wei chancellor Zhai Qiang, a power vacuum triggered an intense succession struggle among Wei nobles, notably Prince Jin. Qin general Gan Mao, then residing in Wei, lobbied King Huai of Chu to jointly pressure Wei into appointing Prince Jin as the new chancellor, arguing it would secure favorable Qin-Wei-Chu relations. Exploiting Wei's internal divisions and the absence of a clear hereditary rule for ministerial posts, external diplomatic maneuvering combined with domestic court intrigue. Ultimately, under the coordinated influence of Qin and Chu envoys, the Wei court installed Prince Jin as chancellor, overriding other candidates. The case exemplifies how foreign powers manipulated Warring States political transitions.

Prince Jin was formally appointed as the Chancellor of Wei with the backing of Qin and Chu. No formal judicial trial occurred; the outcome was a political resolution imposed through foreign influence and court negotiations, effectively ratifying the external intervention.

Whether the succession of the chancellor should be determined solely by the Wei ruler based on merit or lineage, or be subject to intervention by rival states through diplomatic coercion; legitimacy of Prince Jin's appointment under external pressure rather than internal consensus.

The case deepened the erosion of Wei's sovereign decision-making, setting a precedent for foreign states to meddle in ministerial appointments. It weakened internal political stability, fueled factionalism among Wei aristocrats, and demonstrated the declining autonomy of the Wei state amid the Warring States power struggle. The event also later became a classic example in Chinese political discourse of how external forces exploit succession crises.