Background
Sunquanshoufengwuwang was an extremely realist diplomatic maneuver on the eve of the Battle of Yiling. In 220 Caopidaihan established Wei; Liu Bei then proclaimed himself emperor in 221 and launched a massive punitive invasion of Wu to avenge Guan Yu, placing Jiangdong under pressure on two fronts — a newly built Wei watching from the north, and a Shuhan army of tens of thousands driving east. Sun Quan understood clearly that if he confronted Wei he would give Shuhan a clear path to drive straight to Jiangling and beyond; if he confronted Shuhan, Cao Pi would seize the opportunity to strike from the north. Within this two-front encirclement, the only way to break out of the bind was to reach a strategic accommodation with one of the two parties — and that party could only be Caowei, because Shuhan's motive for invading Wu carried Liu Bei's personal desire for revenge, and was nearly impossible to dissolve through diplomacy.
Principal Figures
Sun Quan in this operation displayed a rare political flexibility: ignoring Gu Yong's face-saving suggestion that he "style himself Supreme General and Hegemon of the Nine Provinces," he instead invoked self-justification — "Liu Bang accepted the enfeoffment of Xiang Yu because the times required it" [c:16724] — defining the act of submission as a strategic necessity rather than political capitulation. Cao Pi used the highest ritual honors — the Nine Bestowments and the title "King of Wu" — to receive Sun Quan, elevating Jiangdong from "regional warlord" to "first-rank vassal state under Wei." Within Wei's newly minted legitimacy structure, this was an exceptionally successful piece of external propaganda. The Wei envoy Xing Zhen played an unsuccessful "ritual executor" — his arrogant superior-nation posture was twice undercut, first by Zhang Zhao and then by Xu Sheng, inadvertently highlighting the undercurrent of Jiangdong's literati-officials' unwillingness to genuinely submit [c:16724]. Xu Sheng's tears at the cart's rear and Zhang Zhao's stern rebuke of the envoy serve in the novel as footnotes to this submission: accepting the title on the surface while inwardly waiting for the chance to turn the tables.
Core Issues
This enfeoffment has three core issues. The first is "trading name for time." Sun Quan exchanged a King of Wu title — explicable to those at home as a "measure born of necessity" — for Wei's pledge not to march south during his campaign against Shu. This was the prerequisite for concentrating forces to win at Yiling. The second is "the legitimacy test embedded in the Nine Bestowments." The Nine Bestowments in the Wei-Han transition had become the standard ritual prelude to abdication; Cao Pi's granting of the Nine Bestowments to Sun Quan was drawing Sun Quan into Wei's "proto- abdication sequence" — a favor, but also a political probe: Cao Pi wanted to see whether Sun Quan would move closer to Wei ritually, for instance by sending a son as hostage. Sun Quan's refusal to send a son reflects his clear-eyed awareness of the political cost behind the Nine Bestowments. The third is "acceptance within Jiangdong internally." Xu Sheng's quiet weeping at the cart's rear [c:16724] and Zhang Zhao's dressing-down of the envoy [c:16724] showed that Jiangdong's native literati-officials were emotionally deeply opposed to "submitting to Wei" — yet they still accepted Sun Quan's strategic choice. This "emotional resistance + political compliance" was Jiangdong's consistent internal political ecology.
Political Consequences
The most immediate consequence was that Wei did not march south during the Battle of Yiling, allowing Lu Xun to focus on Liu Bei and win a great victory. Next, Jiangdong acquired an externally recognized state name and from that point could call itself "Wu," operating with the norms of a quasi-independent state in diplomatic documents, official hierarchies, and military-political appointments. After Lu Xun's great defeat of Cao Xiu he was appointed General Who Assists the State, Marquis of Jiangling, and acting Inspector of Jingzhou; "from this point all military authority flowed to Lu Xun" [c:16725] — this concentration of military authority was itself a mark of the King of Wu system's maturity. Without the King of Wu title, Sun Quan could not legitimately have established such a near-independent military-political structure as "Marquis of Jiangling + Inspector of Jingzhou + Grand General." Looking further ahead, the King of Wu title was the legal stepping-stone for the 229 proclamation of emperorship: the three-step legal transition — "King of Wu enfeoffed by the Wei Emperor" → "independent era name Huangwu" → "proclaiming the emperor and founding Wu" — was complete and elegant, avoiding the abrupt legitimacy discontinuity of Liubeichengdi.
Counterfactual Analysis
Had Sun Quan at the time followed Gu Yong's "Supreme General and Hegemon of the Nine Provinces" line and refused to accept the Wei title, Wei would very likely have moved south into Huainan in 221–222 to coordinate with the Shu army; the outcome of the Battle of Yiling would have been extremely uncertain, and in the worst case Sun Quan could have been struck on both fronts and Jiangdong shattered. Conversely, had Sun Quan accepted too completely — sending his son as hostage, relocating the Jianye officials to Xu — Jiangdong would have lost its independence, and even a Yiling victory afterward could not have led to proclaiming an empire. Sun Quan's choice to "accept the title while refusing genuine vassalage" was the most exquisite move in this game of statecraft: it deceived Cao Pi into the neutral window he needed, yet preserved Jiangdong's space to build an independent state in the future, even skillfully shaping himself within Wei's nascent ritual order as a "special existence of Wei-Wu coexistence" — accumulating the full legal and psychological transition toward the 229 proclamation.