Background
In the first year of Jian'an (196), Emperor Xian of Han was a Son of Heaven in name only — after the chaos of Dong Zhuo, the upheaval of Li Jue and Guo Si, and an arduous journey eastward back to the capital, he arrived at Luoyang to find a city reduced nearly to ruins, with officials gaunt from hunger and the storehouses virtually empty. Yet precisely because the Son of Heaven's physical circumstances were so dire, the act of "receiving and escorting" him was politically inexpensive: whoever could solve Luoyang's shortage of food, soldiers, and security would hold the vast political trump card of the Han dynasty's orthodox legitimacy. Yuan Shao at this time commanded the greatest strength; his subordinate Ju Shou had urged him to "hold the Son of Heaven and issue commands to the lords," but Yuan Shao hesitated and could not decide. This hesitation gave Cao Cao — who had just pacified Yanzhou and urgently needed a source of political legitimacy — an irreplaceable strategic opportunity [c:16997]. In the Romance's narrative sequence, Grand Commandant Yang Biao took the initiative to memorialize the throne, and Emperor Xian personally issued an edict summoning Cao Cao to court — this arrangement clothed Cao Cao's entry to court in the legitimate garb of "responding to an imperial summons to serve the realm," avoiding the political charge of "abduction."
Principal Figures
The decision-making core driving this event was the trio of Cao Cao, Xun Yu, and Dong Zhao. Xun Yu had proposed to Cao Cao as early as the Chuping years the strategy of "receiving the Son of Heaven in order to command the disobedient," serving as the chief architect of the entire plan; in the Romance he endorses the capital relocation using the rhetoric of Heaven's mandate and the virtue of Earth, packaging realistic political calculation as the fulfillment of divine will [c:17002]. Dong Zhao was the key executor in the field: seizing the opportunity of an imperial audience to approach Cao Cao, he proposed the relocation of the capital and offered the specific operational step of "reassuring Yang Feng with a letter" [c:17000][c:17001] — he was the one who translated strategy into concrete diplomatic action. Dong Cheng, as a consort kinsman of Emperor Xian, nominally accepted Cao Cao's enfeoffment in the Romance while secretly harboring resentment toward the Cao clan, laying the groundwork for the later "Belt Edict" episode, the Yidaizhao. Yang Feng and Han Xian were the losers in this event: when they had escorted the emperor eastward they were crucial forces, yet lacking long-term strategic vision, they were pacified by a single letter from Dong Zhao and then turned against by the defection of Xu Huang, ultimately losing even their strategic chips.
Core Issues
"Receiving and escorting the emperor" and "relocating the capital" were two actions, but politically they were two sides of the same coin. Merely keeping the Son of Heaven in Luoyang, while Cao Cao remained far away in his command radius centered on Yanzhou, would have left him with limited practical control over court affairs; only by moving the imperial carriage to Xu Chang — Cao Cao's core control zone — could the ritual authority of the Son of Heaven and Cao Cao's actual military force be bound together. When Dong Zhao told Cao Cao that "staying here I fear there will be inconvenience; the best plan is to move the imperial carriage to Xudou," he had seen through this crucial point [c:17001]. The official justification for the relocation was that "Luoyang is devastated, transporting supplies is arduous, Xu Chang is close to Luyang and convenient for grain transport" — a practical rationale that could not be refuted, making it difficult for any opposition faction at court to find a handle to oppose the decision. Xun Yu's supplementary cosmological argument — "Han rules by the virtue of Fire; Your Excellency is destined by the virtue of Earth; Xu Chang corresponds to Earth, and Fire gives birth to Earth" — layered an ideological cloak over the relocation [c:17002], making what was fundamentally a military and political calculation appear to be a natural arrangement that "accords with Heaven and receives the mandate."
Political Consequences
After the imperial carriage entered Xu Chang, "palaces and halls were constructed, ancestral temples and altars of soil and grain established, offices of the provincial administration and judiciary set up, city walls and treasury storehouses repaired; Dong Cheng and twelve others were enfeoffed as ranking lords; rewards and punishments, all were to be handled at Cao Cao's discretion" [c:17003] — these few sentences constitute virtually the founding charter of the Caowei political system during the Jian'an years. Henceforth, the ritual spaces of the Son of Heaven were constructed by Cao Cao; the court's personnel appointments were decided by Cao Cao; all military campaigns were conducted in the name of "acting on the Son of Heaven's edict." Yuan Shao, upon learning that Cao Cao had received the emperor, was enraged but had no means of reversal: Cao Cao used imperial edicts to successively appoint Liu Bei as Governor of Yuzhou, order Gongsun Zan to attack Yuan Shao, and appoint Yuan Shao as Grand Commandant rather than Grand General, each time putting Yuan Shao on the grill. "Holding the Son of Heaven to issue commands to the lords" thus transformed from a strategic slogan into an actual mechanism, unchanged until Cao Cao's death in the twenty-fifth year of Jian'an. At the same time, receiving the emperor also imposed on Cao Cao the role-pressure of "Han Chancellor" — he could not exercise naked violence the way Dong Zhuo had, but had to maintain at all times a layer of political performance as "one who upholds and restores the Han dynasty," and this too was a key reason that constrained him from completing the replacement of Han during his lifetime.
Counterfactual Analysis
If Yuan Shao had heeded Ju Shou's advice in time and preemptively received the emperor at Yecheng, the entire script of the late Han and San Guo would have been completely rewritten: Yuan Shao, combining his lineage as "grand secretary for four generations, three of them serving as Three Excellencies" with legitimate imperial authorization, could have rallied the nation within a short time, leaving Cao Cao permanently as only a regional warlord subordinate to Yuan Shao's system. The Battle of Guandu, even if it had occurred, would have unfolded with the framing of "suppression of a rebel" rather than "a clash between two great warlords," leaving Cao Cao with very low odds of success. If Cao Cao had received the emperor but not relocated him to Xu Chang — leaving him instead in Luoyang — his control over court affairs would have been greatly diminished; consort kinsmen like Dong Cheng could very quickly have reorganized resistance, and Yang Feng and Han Xian would not have been so easily neutralized. It can be said that the true significance of the relocation to Xu Chang lay not in "obtaining the Son of Heaven" but in "placing the Son of Heaven in a space under one's absolute control" — this was the strategic high ground that Cao Cao never relinquished throughout his life, and the fundamental reason he was always able to maintain "orthodoxy is on my side" among the heroes of the San Guo.