Duke Wen of Jin was angered by Zheng’s “fence-sitting” diplomatic tendencies during the power struggle between Jin and Chu. Zheng had ostensibly submitted to Jin while secretly maintaining ties with Chu, a stance that deeply frustrated the Jin ruler.
The Siege of Zheng
In 630 BCE, Duke Wen of Jin, allied with his father-in-law Duke Mu of Qin, launched a joint attack against the State of Zheng. The capital of Zheng was soon surrounded by Qin troops.
At this critical juncture, a Zheng minister named Zhu Zhiwu ventured alone into the Qin camp to meet with Duke Mu. Through sheer eloquence and strategic reasoning, Zhu Zhiwu successfully persuaded Duke Mu to withdraw his forces, thereby preserving Zheng from destruction.
The three persuasive arguments
On the surface, this was a triumph of Zhu Zhiwu’s courage and wisdom. Yet behind his persuasion lay not only transactional offers but also Duke Mu of Qin’s underlying fear of his son-in-law, Duke Wen of Jin. This becomes clear when examining the three key points Zhu Zhiwu presented to Duke Mu.
First, Zhu Zhiwu promised that if Qin withdrew, Zheng would not cease trade relations with Qin but would instead ensure their continuity and even grant Qin control over key commercial ports along the Yellow River. This directly addressed Duke Mu’s strategic interest in securing trade routes into the central plains.
Second, Zhu Zhiwu raised the matter of Prince Lan, a son of the Duke of Zheng. Prince Lan, who was deeply unpopular with his father, had been sent to Jin as a hostage to curry favor with Duke Wen of Jin.
Zhu Zhiwu revealed that Prince Lan was currently in Duke Wen’s military camp and that Jin was demanding not only Prince Lan’s return to Zheng but also his installation as the next ruler of Zheng after the current duke’s death.
Duke Mu was taken aback – this condition had never been disclosed to him by Duke Wen. If Prince Lan ascended the throne under Jin’s sponsorship, Qin’s interests in Zheng would be severely undermined.
Third, Zhu Zhiwu drew Duke Mu’s attention to the disposition of Jin’s main forces. He pointed out that the bulk of Jin’s troops were not focused on besieging Zheng but were strategically positioned along the route that Qin’s army would need to take to return to its homeland.
In effect, Jin had the military capacity to trap and ambush the Qin army should relations sour. Upon realizing this, Duke Mu broke into a cold sweat and decided to retreat immediately – without even notifying his son-in-law, Duke Wen of Jin.
The roots of the conflict
Outwardly, Duke Mu of Qin had joined the campaign to help his son-in-law settle a grudge. Years earlier, during the exile of Chong’er (later Duke Wen of Jin), Zheng had failed to receive him with the honors due to a nobleman.
At the time, Shu Zhan, brother of the Duke of Zheng, had advised either treating Chong’er generously or eliminating him to avoid future trouble. The Duke of Zheng did neither, fearing reprisals from Chong’er’s brother, Duke Hui of Jin, who was then ruling Jin.
After Chong’er became Duke Wen of Jin and defeated Chu state at the Battle of Chengpu, he resented Zheng’s vacillation between Jin and Chu. Using Shu Zhan’s past suggestion to kill him as a pretext, Duke Wen launched the attack on Zheng. Duke Mu of Qin, seeking to expand Qin’s commercial access to the central plains, joined the campaign under the guise of avenging his son-in-law.
The art of strategic persuasion
Zhu Zhiwu’s success demonstrates that a master negotiator does not rely on eloquence alone. True persuasion requires the ability to see through surface motives, understand hidden fears, and grasp the underlying dynamics of power and interest. By appealing to Duke Mu’s strategic needs, revealing Jin’s undisclosed ambitions, and exposing the imminent military threat, Zhu Zhiwu skillfully redirected Qin’s actions – turning an invasion into a retreat and securing Zheng’s survival through insight into human nature and realpolitik.
Leave a Reply