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Recorded · details debatedAI-assisted preparation; human factual review not yet completeEastern Zhou · Spring and Autumn

Cao Gui Waits for the Third Drumbeat

Dynasty Tales · AI-assisted retelling

Published

Qi's powerful army is approaching the weaker state of Lu. An ordinary man asks to see the duke—and starts with a question: what gives you reason to fight?

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Cao Gui in a plain robe, with soldiers, a city gate, and Duke Zhuang behind him.
Cao Gui prepares to seek an audience with Duke Zhuang. AI thematic illustration.· Illustrative reconstruction · AI-assisted story illustration
About 7 min

A Powerful Neighbor Invades

In spring, Qi's army marched out of Linzi straight toward Lu.

Qi had more land and more soldiers. Lu was smaller and weaker. Duke Zhuang of Lu was frightened. Losing this battle could cost him much more than a few towns.

The trouble had begun the year before. Qi's ruler had died, and two princes were living abroad. Prince Jiu was in Lu, and Prince Xiaobai was in Ju. Whoever reached the capital first could become ruler.

Lu sent troops to take Prince Jiu home. His adviser Guan Zhong stopped Xiaobai along the way and shot an arrow at him. It hit Xiaobai's belt hook. Xiaobai cried out, fell, and lay still.

Guan Zhong thought Xiaobai was dead, so the party slowed down. But Xiaobai was pretending. He took a shorter road to Linzi and reached the throne first. He became Duke Huan of Qi.

Lu refused to accept this and fought Qi, but lost badly. Qi forced Lu to kill Prince Jiu and took Guan Zhong away. Duke Huan had just secured his throne and wanted to show his power. Lu looked like an easy target.

Cao Gui, an Ordinary Man

The alarm reached Qufu, and fear spread through the city.

Outside the city lived Cao Gui. He held no office, but he had studied and understood warfare. “I am going to see the ruler,” he said.

A neighbor laughed. “War is the officials' business. Who asked you?”

Cao Gui replied, “Those powerful officials may be shortsighted. They may not see the best plan.”

The neighbor warned him, “One wrong word could cost you your head.”

“Our state is in trouble,” Cao Gui said. “Keeping quiet would mean letting everyone down.”

He brushed off his sleeves and set out.

Three Questions

The duke was surprised that an ordinary man wanted to see him, but asked Cao Gui to come in.

Cao Gui began with a question. “What do you rely on to fight Qi?”

“I never keep all my food and clothing to myself,” the duke said. “I share them with those around me.”

Cao Gui shook his head. “Those benefits reach only the people close to you. Ordinary people get nothing. Why would they risk their lives?”

“I never exaggerate the cattle, sheep, or jade I offer to the spirits,” the duke said. “I present them honestly.”

“That is only a small act of honesty,” Cao Gui replied. “It does not mean the spirits will protect you.”

The duke was quiet for a long time. Then he said, “I cannot investigate every detail of every case. But I always try to judge fairly.”

Cao Gui's eyes brightened. “That shows concern for the people. On that basis, we can fight. Please take me with you.”

Cao Gui speaks to Duke Zhuang inside a hall.
Cao Gui asks what will give Lu the support to fight. AI scene illustration.· Illustrative reconstruction · AI-assisted story illustration

Wait

The army reached Changshao. Cao Gui rode in the duke's war chariot. Across the field, Qi's flags crowded together. Lu's soldiers had sweaty palms.

Cao Gui and Duke Zhuang stand together in a horse-drawn chariot.
Cao Gui accompanies the duke into battle. AI scene illustration.· Illustrative reconstruction · AI-assisted story illustration

The duke held the drumstick, ready to signal the charge.

Qi’s drums sounded for the first time. The duke raised his drumstick.

Cao Gui caught his arm. “Not yet.”

Cao Gui reaches toward the duke’s hand as the duke holds a drumstick.
Cao Gui urges the duke to wait. The physical gesture is an artistic interpretation; the original records his words.· Illustrative reconstruction · AI-assisted story illustration

Lu’s soldiers kept their bows ready and their shields planted. No one broke formation. Even after the drums sounded, they held their positions.

The second round of drums sounded. The duke raised his hand, but Cao Gui stopped him again. “Wait a little longer.”

Soldiers began to mutter. What was their ruler doing? Were they supposed to let the enemy attack? Sweat gathered on the duke's forehead. He started to speak, then said nothing.

Cao Gui watched only the great drum behind Qi's lines.

The Third Drumbeat

The drums sounded for the third time.

Qi had sounded three rounds of drums, and its courage was no longer as strong as at the start. Cao Gui had been waiting.

Lu's soldiers had waited through both rounds. Their strength had been building.

Cao Gui let go of the duke's arm. “Now. Beat the drum!”

The duke struck again and again, making the drum thunder. Lu's army roared and surged forward like water bursting through a gate. Qi's formation broke apart. Men at the front retreated, those behind fled, and chariots crashed into one another.

Duke Zhuang raises a drumstick beside a war drum, with troops behind him.
After Qi’s third drum signal, Lu sounds its own attack. AI scene illustration.· Illustrative reconstruction · AI-assisted story illustration

Wait Once More

The delighted duke was about to order a pursuit.

Cao Gui stopped him again. “Wait.”

He jumped down to look at the wheel tracks. They were tangled and confused. Then he climbed onto the chariot's front crossbar. In the distance, Qi's flags were tilted and scattered.

Cao Gui crouches beside a chariot to inspect wheel tracks while the duke watches.
Before pursuit, Cao Gui inspects the tracks left by Qi’s chariots. AI scene illustration.· Illustrative reconstruction · AI-assisted story illustration

He turned back. “Now we can pursue them.”

Lu's army chased Qi's soldiers out of its territory.

Why Wait?

On the way back to camp, the duke asked, “Why wouldn't you let me sound the drum the first two times?”

Cao Gui said, “An army fights with courage. The first drumbeat brings it to its height. The second weakens it. By the third, it is spent. Their courage was gone while ours was still full. That is why we won.”

Cao Gui and Duke Zhuang talk beside a chariot and drum.
After the victory, Cao Gui explains his decisions. AI scene illustration.· Illustrative reconstruction · AI-assisted story illustration

“Why did you stop me from pursuing them?” the duke asked.

“A powerful state's plans are hard to predict. I feared they might be pretending to flee, with an ambush ahead. Their tangled tracks and fallen flags showed me that they had really lost.”

Now the duke understood. Those anxious moments, when Cao Gui kept holding him back, had stored up his army's strength.

This is the story behind yi gu zuo qi, “rouse the spirit with the first drumbeat.” The first round tested strength; the next two tested patience.

Lu had beaten a stronger enemy. People remembered the ordinary man who had helped. The duke had learned that a ruler needed the people's support, and that victory could depend on choosing the right moment.

Duke Huan returned to Linzi without rushing into another war. Beside him was the man who had once shot an arrow at his belt hook and was now his most trusted adviser. What would he suggest next?

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Let’s talk about the story

  1. Why did Cao Gui think the duke's promise to judge cases fairly mattered more than his first two answers?

    A hint for grown-ups

    Sharing food and clothing helped only the people close to the duke, and honest offerings did not guarantee divine help. Fair judgments showed concern for the wider population, whose support the state needed.

  2. Why did Cao Gui wait until Qi's third round of drums?

    A hint for grown-ups

    He explained that the first drumbeat raised the enemy's courage, the second weakened it, and by the third it was spent. Lu's soldiers still had their energy when they finally advanced.

  3. What did Cao Gui check before agreeing to pursue Qi?

    A hint for grown-ups

    He checked the wheel tracks and looked at the flags. Their disorder showed that Qi was truly fleeing, rather than pretending to retreat into an ambush.

Chinese Idiom Stories: The Tales Behind Chengyu

Where this story comes from

Real or legend?

The central sequence was compared with the Zuo Commentary under Duke Zhuang’s tenth year: Cao Gui’s questions, the shared chariot, Qi’s three drum signals, Lu’s attack, and inspecting tracks and flags before pursuit. The Qi succession background and Guan Zhong’s arrow were compared with Shiji, chapter 32. The original does not describe Qi repeatedly reaching Lu’s formation and withdrawing because Lu stood still. Dialogue, expressions, and the physical gesture of stopping the drumstick are literary and artistic interpretations. Illustrations are not exact reconstructions of historical dress or buildings.

Little discoveries

Time and place

Eastern Zhou · Spring and Autumn · Exact year unknown

A specific year cannot yet be established. Known periods and places follow the available sources.

About this story
Period
Eastern Zhou · Spring and Autumn · Exact year unknown

Primary passages consulted (classical Chinese): - [《左傳》莊公十年·曹劌論戰](https://zh.wikisource.org/wiki/曹劌論戰) - [《史記》卷三十二·齊太公世家](https://zh.wikisource.org/wiki/史記/卷032)

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