Background
This event, as a parent-level event, encompasses the multi-year political integration process that ran from around the twenty-second year of Jian'an (217), when Cao Pi was established as heir to the King of Wei, through to the first year of Yankang (220), when Cao Cao died and Cao Pi completed the succession. Its sub-events include the specific personnel disposals of Dingyidingyibeizhu, Caozhikaisimamenshijian, and Yangxiubeizhu. At the parent level, the central question was how Cao Cao would choose an heir among a group of legitimate sons whose abilities differed markedly but in subtle ways: Cao Ang had died early at Wancheng; after Cao Chong died at thirteen (the thirteenth year of Jian'an), the succession debate narrowed to Cao Pi and Cao Zhi. Cao Zhang was known for military prowess but Cao Cao considered him fit only for "the valor of a common soldier" — outside the frame of civil-governance succession.
Key Figures
Cao Cao was the ultimate decision-maker, and his vacillation between Cao Pi and Cao Zhi lasted several years. Cao Zhi "was supremely intelligent, taking up the brush and completing a composition instantly" — just the kind of talent Cao Cao cherished as a family heritage. Cao Pi was slightly inferior in literary flair but politically steady and shrewdly calculating. When Cao Cao asked Jia Xu about the succession, Jia Xu remained silent for a long moment before answering by invoking "Yuan Bendi and Liu Jingsheng and their sons" — using two contemporary cases of regimes that had collapsed after bypassing the eldest in favor of a more gifted son. This was the decisive word. [c:16978] Cao Pi's core advisor was Wu Zhi. The most prominent figure in this event, however, is Jia Xu — whose strategy was not to advocate for Cao Pi but to let Cao Cao think it through himself. Cao Zhi's core advisors were Yang Xiu and the Ding Yi brothers, who formed the politically closest allies of the "Jian'an literary circle." Yang Xiu was executed by Cao Cao at Hanzhong over the "chicken-rib" incident; the Ding Shi brothers were put to death with their families after Cao Pi's enthronement — these two sets of executions were the most visible price paid in the succession struggle.
Core Issues
The first issue was the ritual principle of "establish the legitimate eldest." Although Cao Cao governed by Legalist methods, on the succession question he ultimately returned to the foundational principle of the Zhou rites. Jia Xu's invocation of "Yuan Bendi and Liu Jingsheng and their sons" was precisely a reminder — through negative cases — that the cost of disrupting seniority far exceeds "exchanging a cleverer heir." The second issue was the political alliances between great-clan factions and members of the imperial clan. Cao Zhi's camp, represented by Yang Xiu and the Ding Yi brothers, stood for the "talent faction" and the "early Jian'an literary circle." Cao Pi's camp, represented by Wu Zhi, Jia Xu, Sima Yi, and Chen Qun, stood for the "political faction" and the "pragmatist bloc." Cao Cao's process of choosing an heir was in effect a final adjudication of the political preferences of these two factions. The third issue was the boundary of imperial-clan power. After Cao Cao's death, Cao Zhang "came from Changan with one hundred thousand troops" [c:16979], posing a direct threat to the just-enthroned Cao Pi. Cao Pi rapidly neutralized this threat through a coalition of imperial-clan representatives outside Cao Zhi's camp (such as Cao Xiu and Cao Zhen) and senior outer-court officials (such as Jia Xu and Chen Qun), establishing the political precedent that "imperial clansmen may not bring troops to court."
Political Consequences
First: Cao Pi's position as crown heir grew secure in the final years of the Jian'an period — the fundamental prerequisite for his subsequent smooth replacement of Han. Second: Cao Zhi was marginalized but not executed; after Cao Pi's enthronement, Cao Zhi was demoted to Marquis of Anxiang and subsequently moved from fief to fief, dying in melancholy. The "Jian'an literature" that Cao Zhi represented was politically suppressed, but his literary achievement paradoxically reached its apex precisely in political failure — one of the most famous "political loser's literary triumph" cases in Chinese literary history. Third: the executions of Yang Xiu, Ding Yi, and Ding Yi were the defining events in the suppression of the "talent faction" within the Jian'an great-clan stratum. Thereafter Caowei's great-clan politics shifted progressively toward domination by the pragmatist faction — a tendency that was reinforced throughout the reigns of Cao Pi and Cao Rui. Fourth: the overall experience of this event profoundly shaped the arrangements for Cao Rui's own successor (Cao Fang): Cao Rui went to extreme lengths to avoid a "dual-track standoff between imperial clan and veteran generals" in his posthumous regency, but in overcorrecting he left the imperial clan so weakened that when Sima Yi launched his coup it could offer no counterweight whatsoever.
Counterfactual Analysis
Had Cao Cao ultimately designated Cao Zhi as crown heir, the "talent faction" centered on Yang Xiu and the Ding Yi brothers would have held supreme political power in Caowei. In the romance's framing, Cao Zhi "took up the brush and completed a composition instantly" but his political judgment was weaker; his rule might have been more brilliant culturally but would have shown greater hesitation in decision-making under the military pressure of Sun Quan and Liu Bei — which is precisely the core of Jia Xu's implicit warning in the "Yuan and Liu sons" comparison. [c:16978] A second counterfactual: had Cao Cao delayed designating an heir until his own deathbed, this "Cao Cao-style procrastination" would have created a high risk of civil war among brothers — a repeat of "the struggle between Yuan Tan and Yuan Shang" would have been quite probable. History has Cao Cao accepting "Jia Xu's counsel" and "hardening" the succession question during his own lifetime through a series of moves — demoting Cao Zhi, executing Yang Xiu, pressuring the Ding Shi — so that Cao Pi could still accomplish a smooth generational transition in the year of his father's mourning. This is one key reason why the Caowei founding was more stable than the other great clan houses of the late Han (the Yuan family, Liu Biao's family, and Liu Yan's family).