Background
The fifth year of Jian'an was a moment of dynastic transition in the Jiangdong region. Sun Ce had been assassinated and Sun Quan had ascended to power at under twenty years of age. The inner circle of Jiangdong was anchored by Zhang Zhao and Zhou Yu, while externally the situation was complex: Yuan Shao and Cao Cao were on the verge of a decisive clash, and Liu Biao occupied the middle Yangtze in Jingzhou. At this moment Lu Su was introduced to the Wu court by Zhou Yu, whereupon Sun Quan "personally invited him to stay, sharing a couch and drinking together". From the way the historical sources frame the scene, this meeting was both a political test of Lu Su by Sun Quan and a private exercise in charting a long-range course for the new regime. Zhang Hong had earlier proposed to Sun Ce in Jiangdu that he "establish dominance over Jiangdong and gather outstanding men," a path still oscillating between "serving the king" and "self-preservation." The Tashangce was called upon to answer a sharper question: given that a Han restoration was clearly no longer viable, should Jiangdong set its sights directly on imperial rule?
Key Figures
Lu Su came from the gentry of Dongcheng County in Linhuai Commandery, Xuzhou, and brought with him more than a thousand clan retainers and household troops — one of the rare early strategist-scholars who combined the capacity for military self-defense with strategic thinking. When he laid out his strategy for Sun Quan, he was already ready to bind his own fate to Jiangdong. Sun Quan, who had just inherited the enterprise built by his father and elder brother, needed to project the ritual posture of "assisting the Han like Huan and Wen" toward the outside world while internally requiring a long-term blueprint that could consolidate the confidence of the gentry families and military commanders. The third crucial observer was Zhang Zhao: his later disparagement of Lu Su as "young and careless" reflects the high political vigilance of Jiangdong's elder statesmen toward the "abandon the Han, establish independence" line that Lu Su represented.
Core Arguments
The Tashangce contained three interlocking propositions. First, "the Han dynasty cannot be restored" — denying the feasibility of supporting Emperor Xian. Second, "Cao Cao cannot be swiftly eliminated" — accepting the structural fact that a powerful unified regime would emerge in the north. Third, "plant your feet in Jiangdong, control the entire Yangtze, and proclaim the imperial title" — positioning Jiangdong as one of three powers under heaven, first neutralizing Huang Zu, then absorbing Liu Biao, and using the Yangtze as a dual axis for both defense and expansion. This framework proposed a "three-way standoff" before Zhuge Liang's Longzhong Plan seven years later, and explicitly named the imperial title as the endpoint. Its difficulty lay in this: on the surface Sun Quan had to maintain the posture of supporting the Han (he immediately responded with the phrase "assisting the Han"), while in practice he was to quietly substitute the reality of hegemonic dominance for that appearance. This "two-layer" political design — one public face, one hidden agenda — became the norm for Sunwu over the following decades.
Political Consequences
In the short term Sun Quan did not openly adopt the plan, yet from that point forward Lu Su's political standing entered the top tier. Within three to five years Jiangdong proceeded exactly along the sequence the Tashangce had mapped out: in the thirteenth year of Jian'an Huang Zu was eliminated; on the eve of Chibi an alliance with Liu Bei held off Cao Cao; thereafter Jingzhou was gradually secured; then the Battle of Yiling recaptured the western portion of Jingzhou; and finally in the first year of Huanglong, Sun Quan officially proclaimed himself emperor. The entire trajectory matches the Tashangce's projections with striking fidelity. According to the San Guozhi, "Biography of Lu Su," Sun Quan in his later years even remarked specifically that "Lu Zijing once spoke of this — he may truly be called one who understood the shape of affairs," formally recognizing the Tashangce as the founding document of Jiangdong state policy. The novel supplied a ritualized version of this relationship in chapter fifty-three, where Sun Quan dismounted to receive Lu Su, and Su himself declared, "I hope Your Lordship's might and virtue will spread across the four seas, encompass the nine provinces, and achieve the imperial enterprise — only then shall Su's name be inscribed on bamboo and silk and come to glory", presenting the strategic accord between ruler and minister in theatrical form.
Counterfactual Analysis
Had Sun Quan genuinely adhered to the "assist the Han" line, Jiangdong would have gradually lost its autonomy under the political pressure of Cao Cao wielding the Son of Heaven. The most likely outcome would have been bearing the obligations of the Han-supporting title without any real benefit, and possibly being swallowed jointly by Liu Biao and Cao Cao on the Jingzhou question. Had Lu Su proposed this strategy ten years later, Sunwu might have missed the window on the eve of Chibi to ally with Liu Bei, leaving Jiangdong to face Cao Cao's southern campaign alone — an outcome difficult to view with optimism. Conversely, had Lu Su made "proclaiming the imperial title" explicit and forced Sun Quan into an early public declaration, the backlash from the Zhang Zhao faction within Jiangdong might have torn the regime apart directly. The true political wisdom of the Tashangce lay in "openly serving the Han while secretly founding the state" — it was a long-range design for executing a course change over more than twenty years without ever making a public declaration. Measured against this standard, the Tashangce was not merely a position paper but the hidden source code of Sunwu's political culture.