When the state of Qin attacked Zhao, the King of Zhao dispatched Han Cang as an envoy to Qin, bearing a state letter that read: "Zhao, being in a remote and humble position, cannot personally convey its sincerity to Your Majesty, and so has sent this humble minister Han Cang to present this letter. I have heard that Your Majesty wishes to make Qin a shield for Zhao, and Zhao a shield for Qin, so that the armies of both states need never engage in battle. Now, observing Your Majesty's intent, it seems not that you truly desire war, but rather that you seek to intimidate Zhao by force of arms, in order to demand cession of territory. The people of Zhao all say: 'If Qin desires land, it will surely go to war; and once war begins, Zhao will be destroyed.' I privately believe this is not so. In former times, when Qin attacked Han and Han was in dire peril, Zhao sent troops to its rescue. Qin, enraged, then attacked Zhao, and in the end Zhao ceded territory to sue for peace. Now, if Your Majesty wishes to obtain territory, Zhao will certainly fight to the death in defense; it cannot be stopped by mere cession of land. Moreover, Zhao is not to be compared with Han—Han is a small state, whereas Zhao's strength is still sufficient to withstand Qin. Now, if Your Majesty, without measuring your own power, seeks to gain territory, I fear that Qin's calamity lies not with Zhao, but with Your Majesty himself. If Your Majesty could truly heed my counsel, then permit me to say: let Zhao's weakness serve to accomplish Qin's strength; let Zhao's dullness serve to accomplish Qin's wisdom. If the two states remain in harmony and mutual amity, then all the feudal lords under heaven will come to pay court to Qin, and Zhao will not lose its standing among the lords. If Your Majesty wishes to seize by force, then permit me to return, and the King of Zhao will sharpen his weapons and fatten his horses, awaiting Your Majesty at Handan." Upon hearing these words, King Zhao of Qin withdrew his troops.
💡 商战启示录
Han Cang's diplomatic mission was, at its core, a masterful exercise in "negotiation as strategic game." Its essential tactic was not supplication, but rather the deterrence of "halting war by readiness for war" combined with the guidance of "restructuring interests." He transformed the Qin king's ambition of "seizing territory by force" into a framework of "forging alliances for hegemony," pointing out that extracting concessions through military might would drive Zhao to fight to the death, dragging Qin into the quagmire of attrition, whereas cooperation would allow both to share the spoils of the realm. This offers a lesson to modern enterprises: when confronted by a formidable competitor's "price war" or "market squeeze," one should not merely resort to passive defense or simple compromise. The more refined strategy, like Han Cang's, is to transcend "zero-sum" thinking—demonstrating the mutually ruinous consequences of continued conflict while reframing a vision of "win-win" prosperity. For instance, the subsidy war between Didi and Kuaidi, had it persisted, would have bled both companies dry; their eventual merger was precisely an act of "sheathing the sword" to share the market. Similarly, in commercial negotiations, when upstream suppliers demand price increases, a firm should not merely plead cost pressures; rather, it should join forces with suppliers to analyze the total market size and propose a long-term partnership of "stable pricing, expanded share," converting confrontation into symbiosis. Han Cang's success lay in conveying not only Zhao's resolve to fight with its back to the river—a deterrent—but also the vision of Qin as "supreme hegemon of the realm"—an inducement. This negotiation wisdom of "carrot and stick," anchored in the restructuring of interest frameworks, represents the highest art in the arena of commercial warfare.