Su Wu: Herding Sheep and the Goose Letter Were Never His Doing, but a Nineteen-Year Marriage across the Frontier Was Real —Memories of Hanshu Figures, No. 10

This is a source-checked, AI-assisted contemporary bilingual narrative by Clio Walker, based on the Hanshu and accessible classical and museum materials. It is neither Su Wu’s memoir nor Ban Gu’s original prose. The Han envoy’s choices, Xiongnu decisions, reported speech in the biography, and later images of loyalty are kept distinct.

The idiom "a wild goose carries a letter" comes from the story of Su Wu.

Yet the Book of Han says plainly that the goose shot down by the Son of Heaven in the Shanglin Park, with a silk letter tied to its foot, never existed. It was invented by one man and told to another in the night.

The man who invented that goose was Chang Hui. To understand why he did it, we have to go back nineteen years, to a diplomatic mission.

I. He Did Not Go to Herd Sheep

When Su Wu set out in 100 BCE, he took with him not sheep but more than a hundred people.

In those years Han and the Xiongnu fought and exchanged envoys at the same time, and each side had detained the other's men. The newly enthroned Qiedihou Chanyu had released the Han envoys held earlier. Emperor Wu returned the courtesy, sending Su Wu, a general of the palace gentlemen, bearing the imperial tally, to escort home the Xiongnu envoys stranded in Han, together with generous gifts.

His deputy was Zhang Sheng, and among his staff was Chang Hui. With the recruited soldiers and scouts, they numbered a hundred or more.

The task was meant to be simple: deliver the men, deliver the gifts, complete the handover, and go home.

That tally would later become a symbol of loyalty. But at the moment of departure it was first of all a grant of authority. The man who held it spoke for the emperor, and everything the mission did was recorded under his name. If the deputy caused trouble, the envoy could not simply say "I didn't know" and walk away.

II. The Deputy's Blunder

In the Xiongnu lands, the chanyu accepted the gifts, and, the Book of Han says, became only more arrogant. That is the judgment of a Han historian; the Xiongnu left no account of their own.

What truly brought the mission down was a conspiracy hatched right beside it.

The Xiongnu King of Gou, together with Yu Chang and others, plotted to abduct the chanyu's mother, the yanzhi, and kill Wei Lü. Wei Lü had been a Han subject who surrendered to the Xiongnu and was made King of Dingling.

Yu Chang had known Zhang Sheng back in Han. He went to him privately: I can shoot Wei Lü dead for Han; I hear the Son of Heaven hates him bitterly. My mother and younger brother are in Han, and I hope the court will reward them.

Zhang Sheng agreed and gave him money and goods. He did not tell Su Wu.

One of the conspirators slipped away in the night and informed, and the plot came out. Yu Chang was taken alive and was about to name Zhang Sheng. Only then did Zhang Sheng grow afraid and tell Su Wu the truth.

Su Wu said: now that things have come to this, it will surely implicate me. To be humiliated and then die would wrong my country all the more.

He tried to kill himself, but Zhang Sheng and Chang Hui stopped him.

III. Fire beneath a Pit

The chanyu was furious and called his nobles together to discuss killing the Han envoys. Someone advised: if we kill them merely for plotting to murder Wei Lü, what heavier penalty would remain for plotting against the chanyu? Better to make them all surrender.

The chanyu sent Wei Lü to interrogate Su Wu.

Su Wu said to Chang Hui and the others: "To bend my tally and disgrace my mission, even if I lived, with what face could I return to Han!"

He drew his knife and stabbed himself.

Wei Lü, horrified, threw his arms around him and sent a rider galloping for a doctor. The doctor dug a pit in the ground, lit a smoldering fire in it, laid Su Wu face down over the pit, and trod on his back to let the bad blood flow out.

Su Wu had stopped breathing. Half a day later, he breathed again.

All of these actions come from the Book of Han. There is no need to add a snowstorm or a sigh; it is harrowing enough.

IV. The Sword and the Riches

Su Wu's wound slowly healed. The chanyu sent people morning and evening to ask after him, set on making him surrender.

Using the trial of Yu Chang as his occasion, Wei Lü beheaded Yu Chang in front of Su Wu. Under the sword, Zhang Sheng begged to surrender.

Wei Lü said to Su Wu: your deputy is guilty, and you should share his punishment.

Su Wu said: "I took no part in the plot, and I am not his kin. Why should I share his punishment?"

Wei Lü raised his sword at him. Su Wu did not move.

Wei Lü changed his tone: "Lord Su, I turned my back on Han and came over to the Xiongnu, and by great good fortune I was granted the title of king. I command tens of thousands, my horses and herds cover the hills, such are my riches and honors. Lord Su, surrender today and tomorrow you will be the same. Otherwise you merely feed the grass of the wilderness with your body, and who will ever know?"

Surrender today, and tomorrow you will be as rich as I am. Rot in the wilds as fodder for weeds, and who will ever know?

Su Wu did not answer.

Wei Lü went on: if you surrender through me, we will be brothers. If you will not listen to me today, will you ever get to see me again?

Only then did Su Wu speak, and he cursed him: you were a subject, yet you disregarded favor and duty, betrayed your lord and your kin, and became a surrendered captive among the barbarians. Why should I see you!

Wei Lü's question, "you merely feed the grass of the wilderness with your body, and who will ever know?", was in fact very well aimed.

Between Han and the Xiongnu there was no wall on which everyone stood on one side for life. Envoys, defectors, captives, people raised on the frontier, any of them might cross over, and those who crossed did indeed live well.

Su Wu's choice is remembered precisely because the other choice was real, and lay right in front of him.

V. "When the Rams Give Milk"

Wei Lü, knowing he could not frighten him, reported to the chanyu. The chanyu wanted all the more to make him yield.

Su Wu was shut in a great cellar and given nothing to eat or drink. It snowed. Lying in the cellar, he chewed the snow and swallowed it together with felt fibers. For days he did not die.

The Xiongnu thought he was a god.

The chanyu moved him to "an uninhabited place on the North Sea" and set him to herd rams, saying: "When the rams give milk, you may go home."

Rams do not give milk. The words meant: you will never go home.

Chang Hui and the other staff were separated and held in different places.

Later generations usually identify the North Sea with today's Lake Baikal. But the Book of Han leaves no camp that can be pinned to a modern map.

VI. The Tassels All Fell Away

At the North Sea, the promised rations never came. Su Wu dug out the grass seeds wild rodents had stored in their burrows to stave off hunger.

"Leaning on the Han tally, he herded sheep; lying down and rising up, he held it, until its tassels had all fallen away."

He herded sheep leaning on that Han tally, held it in his hand when he lay down and when he rose, and the yak-tail tassels on it fell away, one by one, until none were left.

This is the scene later painters loved best: one man, one bare tally, a flock of sheep.

But nineteen years is not a still picture.

Five or six years later, the chanyu's younger brother, the King of Yujian, came to hunt by the North Sea. Su Wu could weave nets, spin the silk cords tied to arrows, and straighten bows and crossbows. The King of Yujian liked him and supplied him with food and clothing.

More than three years later, the King of Yujian fell gravely ill and gave Su Wu horses and livestock, vessels for wine, and a tent. The king died and his people moved away. That winter the Dingling stole Su Wu's cattle and sheep, and he fell into hardship again.

He did not survive in the wilderness on willpower alone. He lived by his skills, and for a time he lived by the care of a Xiongnu prince. The picture of "a lone loyal subject holding out in a foreign land" pushes all of these people out of the frame.

VII. Li Ling's Wine

There was one man who for a long time did not dare come to see him.

Li Ling. The two had once both served as palace attendants. After his defeat and surrender, Li Ling had been too ashamed to go to the North Sea.

Later the chanyu sent him. He laid out a feast with wine, had music played, and then, one by one, told Su Wu what had become of his family:

Your elder brother was steadying the emperor's carriage as it came down from a hall; it struck a pillar and the shaft broke. He was charged with grave disrespect and fell on his sword. Your younger brother was ordered to pursue a eunuch horseman who had fled; he failed to catch him and, in terror, took poison and died. By the time I left, your mother had passed away, and I followed her funeral to Yangling. Your wife was young, and I hear she has remarried. At home there remain only your two sisters, and your two daughters and a son. More than ten years have passed since; whether they are alive or dead, no one knows.

Then he said: "Life is like the morning dew. Why torment yourself so long!"

He added: when I first surrendered, I was dazed, as if mad, aching at having failed Han, and my old mother was held in the Baogong prison besides. Is your reluctance to surrender any greater than mine was then? Moreover, the emperor is old, the laws are capricious, and dozens of great ministers' families have been exterminated without guilt. No one's safety can be known. "For whom, Ziqing, are you still holding out?"

That question went to the bone.

Su Wu answered: we Su, father and sons, had no merit or virtue of our own. Everything we have, the emperor made, ranking us among the generals and raising us to the marquisate. My brothers all served close to the emperor, and I have always wished to repay him even if my brains and liver were spilled on the ground. Now that I can give my life in loyalty, "even facing the axe or the cauldron, I would truly go gladly. A subject serves his lord as a son serves his father. A son who dies for his father has no regret." Please say no more.

Li Ling drank with him for several days, and said again: Ziqing, just listen to me this once.

Su Wu said: "I have counted myself dead for a long time! If you, my lord, are determined to make me surrender, then let us finish today's pleasures, and I will die before you!"

Li Ling saw how utterly sincere he was and sighed deeply: "Ah, a man of honor! The crimes of Wei Lü and myself reach up to Heaven." His tears soaked his robe, and he took his leave.

Too ashamed to give gifts himself, Li Ling had his wife send Su Wu several dozen cattle and sheep.

Su Wu's words express the ethics of ruler and subject of his age. Readers today need not accept them as they stand. But the string of dead whom Li Ling counted out keeps "loyalty" from being merely a glow around one man: the empire's punishments and caprice were the most powerful argument for surrender. Su Wu did not dispute any of these facts. He simply would not go.

Later Li Ling came to the North Sea again and told Su Wu: Emperor Wu is dead.

Su Wu faced south and wailed aloud until he coughed up blood. For several months afterward, morning and evening, he faced south and wept in mourning.

VIII. An Invented Goose

Some years later, Emperor Zhao came to the throne, and Han and the Xiongnu made peace through marriage. Han sent envoys to ask for Su Wu and the others; the Xiongnu falsely claimed that Su Wu was dead.

Later, Han envoys came again. Chang Hui found a way to bribe his guards and, at night, met the Han envoy and told him everything that had happened over the years.

Then he taught the envoy a story: tell the chanyu that the Son of Heaven, hunting in the Shanglin Park, shot down a goose, and tied to its foot was a letter on silk saying that Su Wu and the others were in such-and-such a marsh.

The envoy was delighted and confronted the chanyu exactly as Chang Hui had instructed.

The chanyu looked at the men around him, startled, and apologized to the envoy: Su Wu and the others are indeed still alive.

That is the truth behind "a wild goose carries a letter." No goose flew from the North Sea into the Shanglin Park. Chang Hui invented it because it worked: it dressed up news obtained through a secret channel as evidence as unanswerable as the will of Heaven, and left the liar unable to tell how much the Han envoy really knew.

Later, that goose became one of the loveliest images in Chinese poetry. What it really looked like was closer to an intelligence operation.

IX. Nine Men

Li Ling held a farewell feast for Su Wu and said: "We are men of different realms. Once parted, we are parted forever!"

He rose and danced, singing: "I crossed ten thousand li, over the desert sands, as your general, to strike at the Xiongnu. The road ran out, arrows and blades were broken, my men were destroyed and my name was ruined. My old mother is dead; though I would repay her kindness, where can I go?"

When the song ended, tears ran down his face, and he bade Su Wu farewell forever.

The chanyu gathered Su Wu's old staff. More than a hundred had set out; some had surrendered, some had died. In the end, only nine came back with Su Wu.

In paintings Su Wu usually stands alone. In the original biography, Chang Hui is there from beginning to end: first stopping him from killing himself, later risking a night meeting with the Han envoy and inventing that goose.

The return home was not the work of a solitary hero who held out until the court remembered him. It was achieved by a handful of survivors, passing it from hand to hand.

In the spring of 81 BCE, Su Wu arrived in Chang'an. He was ordered to take sacrificial offerings to pay his respects at Emperor Wu's tomb shrine, was appointed Director of Dependent States, and was granted two million cash, two qing of public land, and a residence.

The Book of Han settles those nineteen years in a single sentence: "Wu remained among the Xiongnu nineteen years in all. He went out in the strength of his prime; when he returned, his beard and hair were white."

X. After the Return

Coming home was not the end of the story.

The next year, Shangguan Jie and his son, Sang Hongyang, and the King of Yan rebelled. Su Yuan, Su Wu's son who had remained in Han, was caught up in it and executed. The chamberlain for law asked to arrest Su Wu; Huo Guang held the memorial back and only had him dismissed from office.

After Emperor Zhao died, Su Wu took part in the deliberations that installed Emperor Xuan, was made a marquis within the passes, later restored as Director of Dependent States, and honored as an elder statesman.

There is one more thing that is hard to fit into a simple portrait of a loyal minister.

While among the Xiongnu, Su Wu had a son with a local woman, named Tongguo. In old age he asked that an envoy be sent with gold and silk to ransom this son and bring him back. Emperor Xuan agreed. Tongguo came to Han and became a court gentleman.

Nineteen years did not seal a man away as a symbol. They also left behind a family that spanned Han and the Xiongnu.

Su Wu lived past eighty and died in the second year of Shenjue, 60 BCE.

In the third year of Ganlu, Emperor Xuan had portraits of eleven meritorious ministers painted in the Qilin Pavilion. The last name on the list reads "Director of Dependent States Su Wu."

That Han-dynasty portrait is long gone. But Su Wu has walked into new pictures again and again. Wen Tianxiang wrote of "Su Wu's tally in the Han" in his "Song of Righteousness"; in the late Qing, Ren Yi, and during the War of Resistance against Japan, Fu Baoshi, both painted him herding sheep. Every age has seen in that tally what it needed.

XI. Epilogue

Back to the goose.

An invented goose rescued a real man. And that real man was later painted into a symbol much like a goose: clean, solitary, flying in only one direction.

But the Su Wu of the Book of Han always had people around him. Chang Hui, who stopped him from killing himself; the doctor who lit the fire that saved his life; the King of Yujian, who gave him food and clothing; Li Ling, who drank with him for days and finally left in tears; and his son Tongguo, born beside the North Sea and later ransomed back to Chang'an.

Wei Lü asked him: "You merely feed the grass of the wilderness with your body, and who will ever know?"

Two thousand years later, we know. It is only that the Su Wu we know is often missing many of the people from his real nineteen years.

———

Sources and editorial notes

1. Core primary text: Book of Han, chapter 54, "Biographies of Li Guang and Su Jian," Su Wu section, using a public-domain electronic transcription with Yan Shigu's commentary, cross-checked against the Chinese Text Project entries for the Former Han History, chapters 53–54. The first year of Tianhan is 100 BCE; spring of the sixth year of Shiyuan is 81 BCE; the second year of Shenjue is 60 BCE; ancient calendar dates are not forced into modern months and days. Links: https://ancient-china-books.github.io/hanshu/OEBPS/Text/054.htm https://ctext.org/wiki.pl?chapter=198339&if=gb

2. The goose letter: the biography states explicitly that Chang Hui met the Han envoy at night and taught him to claim that "the Son of Heaven shot in the Shanglin Park and obtained a goose, with a silk letter tied to its foot." The goose letter was therefore a negotiating tactic, not a bird-borne message confirmed by the source. This story does not read the later idiom back into fact.

3. The North Sea: the Palace Museum's description of Ren Yi's Su Wu Herding Sheep follows the traditional identification of the North Sea with today's Lake Baikal; the Book of Han says only "an uninhabited place on the North Sea" and gives no route or camp that can be reconstructed on a modern shoreline. No coordinates are assigned to the North Sea episodes; their exact location remains to be verified. Link: https://www.dpm.org.cn/collection/paint/234558.html

4. Later reshaping: Wen Tianxiang's public-domain "Song of Righteousness" is used to show the Song-period moralizing of "Su Wu's tally"; museum descriptions of works by Ren Yi and Fu Baoshi, and collection information for an 1873 album leaf by Hu Zhang, show how images reinterpreted Su Wu in late Qing, modern, and wartime contexts. They prove later reception, not the snow, dress, or appearance of the Western Han scene. Links: https://zh.wikisource.org/zh-hans/%E6%AD%A3%E6%B0%A3%E6%AD%8C https://www.dpm.org.cn/collection/paint/234558.html https://www.dpm.org.cn/collection/paint/232718.html https://www.metmuseum.org/art/collection/search/904736

5. Geographic boundaries: "arriving at the capital" in 81 BCE is linked only to a reference point for the Han Chang'an city site area, based on the Book of Han text and the Digital Silk Road place-name gazetteer of Japan's National Institute of Informatics; no route of entry, residence, or palace of appointment is identified. The chanyu's court was a mobile political center; the place where Yu Chang plotted, the empty cellar, the North Sea grazing grounds, and the King of Yujian's range lack sufficient evidence for location. Link: https://dsr.nii.ac.jp/digital-maps/dsr/place-names/0133.html.ja

6. Fact and retelling: speech is attributed as in the Book of Han and mostly given in paraphrase; phrases such as "why it worked," "an intelligence operation," and "pushed out of the frame" are editorial interpretation, not the participants' psychology. No new dialogue, weather, precise routes, or private thoughts are added. The mutual detention of envoys, the variety of people within the Xiongnu world, and Su Wu's family among the Xiongnu are all retained; Han and the Xiongnu are not written as two sealed, internally uniform blocs. The ancient texts are public domain; museum pages are used only for brief factual summaries, and no protected research or image is reproduced. The narrative is an original contemporary work.