Yecheng is a northern stronghold whose capture helps Cao Cao consolidate control over the former territories of Yuan Shao, while a later forged proclamation posted at its main gate shows how the city remains a stage for political maneuver. Its fall is achieved by diverting the River Zhang, and its later role in a plot against Sima Yi links military geography to the struggle over political authority.

Capture and the struggle for the north

After Yuan Shao’s death, his sons Yuan Tan and Yuan Shang fight over the family’s power. Yuan Tan’s adviser Guo Tu urges him to seek help from Cao Cao, who recognizes that the north is vulnerable: the people resent the Yuan family, its members are divided, and the ruling house lacks the local support enjoyed by Liu Biao’s regime in Jingzhou.

Cao Cao initially assists Yuan Tan, but their alliance gives way to mutual suspicion. As the contest between Cao Cao and Yuan Shang continues, cities change hands and armies are defeated. Cao Cao eventually arrives again before Yecheng’s closed gates. To force the city’s fall, he diverts the River Zhang and floods it, while ordering that members of the Yuan clan be spared. The capture marks a decisive turn in the campaign to bring the north under Cao Cao’s control.

A city in the aftermath of conquest

Cao Pi, Cao Cao’s eighteen-year-old son, is among the invading forces at Yecheng. The narrative presents him as already accomplished in letters and arms, and recalls that an auspicious purple cloud at his birth had been interpreted as a sign of future imperial status. After the city falls, he enters Yuan Shao’s residence despite the guards assigned to protect the household. The scene places the Yuan family’s vulnerability within the larger consequences of Cao Cao’s victory.

Cao Cao is later buried at Gaoling in Ye, connecting the city with the dynastic transition that follows his death. Yu Jin is charged with responsibility for the tomb. There he sees a wall painting depicting his defeat by Guan Yu, including the loss of seven armies and his capture, with Pang De shown triumphant. The account presents the image as a deliberate insult by Cao Pi; Yu Jin is deeply shaken, falls ill, and dies not long afterward.

The forged proclamation

Yecheng reappears in a later contest over Sima Yi’s standing at court. Ma Su observes that Cao Rui distrusts Sima Yi as a schemer, and proposes exploiting that suspicion with rumors and false proclamations attributed to Sima Yi. A fabricated notice is found nailed to Yecheng’s main city gate and brought to Cao Rui.

The notice claims that Cao Cao had originally wanted Cao Zhi to succeed him, that Cao Rui had been enthroned despite lacking virtue, and that Sima Yi must overthrow the ruler to fulfill Cao Cao’s supposed intentions and Heaven’s will. These are assertions planted by the plotters, not established facts. Their appearance at the city gate nevertheless produces anxiety in the court: advisers debate whether to act against Sima Yi or treat the notice as an attempt by Shu or Wu to destabilize the empire.

Narrative significance

Across these episodes, Yecheng is both a military prize and a conduit for political claims. Cao Cao’s flooding of the city turns control of the River Zhang into a means of conquest; the later proclamation turns the gate into a public surface on which contested accounts of succession and legitimacy can be displayed. The city’s appearances thus connect the defeat of the Yuan family with later attempts to manipulate the Wei court, showing how possession of territory and control of political interpretation remain intertwined.