Duck Dao of Former Liang

In the eighth month of 376 a small procession came out of the eastern gate of Guzang and stopped in front of the army waiting for it. The man wore white, rode a white horse, and had his hands bound behind his back; a coffin stood upright on the cart behind him. It was the form of a ruler who meant to say that his life and his city were no longer his. The Former Qin commander, Gou Chang, untied him and burned the coffin, then sent him east to Chang'an. Nothing was stormed. No gate was broken. The last ruler of Former Liang came out to surrender a province his family had held for seventy-five years, and the man who received it had a house waiting for him in the Qin capital.
The question is why he did not fight. He had done everything a man does when he intends to fight: rejected the advice to send a hostage, killed the two Qin envoys in front of his own army, and ordered his soldiers to shoot them until they were dead. A ruler who kills an envoy has burned the bridge behind him. Yet six weeks later he came out with his hands tied. The usual explanation is that he was weak and self-indulgent, and the sources, written under the victors, supply it. But weakness does not explain the sequence. A weak man does not kill an envoy, and a weak man does not stand on a roof and talk three hundred armed men out of a coup, as this man had done fifteen years earlier. Something else was being calculated in Guzang, and the calculation had been going on long before the Qin columns appeared.

1. A Younger Son

He was born into the ruling house of a province that had learned to behave like a state without ever quite becoming one. The house had held the corridor since 301, when his great-grandfather Zhang Gui was sent west as governor of Liangzhou; his grandfather Zhang Shi was murdered in 320; his father, Zhang Jun, ruled from 324 to 346 and made the province rich. Zhang Jun had several sons. Zhang Chonghua, the heir, succeeded him. Zhang Zuo, the eldest son by a concubine, was older than Chonghua and never forgot it. Zhang Tianxi was the youngest son, which in this house meant the honors of a prince and the expectations of a spare. He was a younger brother of Zhang Chonghua, a half-brother of Zhang Zuo, and an uncle of Zhang Xuanjing. Those three relationships are the skeleton of his life, and the reason he could kill a boy and call it family business.
No birth year is recorded. The Zizhi tongjian gives an age at his accession, but the notice is late and isolated, and a birth year computed from it would be arithmetic masquerading as fact. He was a grown man in 361, when he first appears as a political actor, and he held a command in the palace guard. The Liang biography calls him the middle army commander; the Tongjian says that after the fall of the Song clan he shared the regency with Zhang Yong. It was a balance between two men and a boy. It did not last.
The first thing he did in public was to break the balance. Zhang Yong had destroyed the Song family and begun to behave as if the province were his. Two young clients, Guo Zeng and Liu Su, told Tianxi at night that the commander's comings and goings looked like those of the man who had once taken the throne. The comparison was to Zhang Zuo, and it was the one comparison that could move a Zhang. Liu Su said he could do the job, and that Zhao Baiju would help.
The attempt was almost a farce. Tianxi went to court with four hundred men and with Zhang Yong beside him; Liu Su and Zhao Baiju had filed their knives out of their sheaths inside their sleeves. At the gate they struck and missed, struck again and missed again. Zhang Yong ran, raised three hundred armored men, and attacked the palace gate. Tianxi climbed onto the roof and shouted down at them. He said Zhang Yong was a rebel who had destroyed the Song family without cause and now meant to overturn the house, that the soldiers were the Zhangs' hereditary subjects and should not turn their weapons against their own masters, and that he wanted only Zhang Yong's person. The men dispersed. Zhang Yong cut his own throat. Tianxi killed his faction and took the regency. He had won by standing above the fight and speaking to the men in it as members of a household. The speech is polished, and the Jinshu is a seventh-century compilation whose set pieces are not transcripts, but the shape of the event is clear: he had a talent for making a coup look like housekeeping.
What he surrendered was a governorship: his family had held Liang by commission for five generations, and 376 ended a tenure, not a dynasty. He never took the title of king or emperor. What he took, in 363, was the title his father had held at his most cautious: commissioner with plenary powers, grand commander, general-in-chief, governor of Liangzhou, duke of Xiping. A man who kills a ruler and then declines the crown is not being modest. He is telling the other courts that nothing has changed. He sent a petition to Jiankang and returned the Jin envoy. The forms were the message.

2. The Night in the Palace

Zhang Xuanjing was a child, and the record says he was gentle. He had been placed on the throne in 355 by the men who killed Zhang Zuo, and for most of his reign he watched his regents kill one another. Zhang Guan, the strongest of them, was destroyed by the Song brothers; the Song brothers were destroyed by Zhang Yong; Zhang Yong was destroyed by Tianxi. The details belong to the biography of Xuanjing. What matters here is the position they left the boy in: he had a throne, a grandmother, a mother by courtesy, and no army of his own. His uncle had the army.
In 363 the grandmother, Lady Ma, died. Xuanjing raised his father's concubine, Lady Guo, to the rank of grand consort. Lady Guo then did what consorts in this court did: she plotted. She and the minister Zhang Qin planned to kill Tianxi. The plot leaked, and Zhang Qin and his group were executed. The boy was frightened, and he did the one thing that might have saved him: he offered the throne to his uncle. Tianxi refused. The refusal is the most revealing act of his life. He did not want a transfer; he wanted a killing. A transfer would have left the boy alive and made the uncle the beneficiary of the boy's choice. A killing would make him master of the house, and the house would have to accept it.
The Tongjian says that Liu Su and others then urged him to take the throne. The Jinshu says only that he led troops into the palace gate, had Xuanjing secretly killed, and announced that the boy had died suddenly. The Tongjian fills in the night: Tianxi sent Liu Su and his men into the palace with soldiers, and they killed the boy in his own quarters. No source says how. The death was announced as an illness, and the court went into mourning for a child who had been murdered a few hours earlier. A posthumous title was chosen, and the province was told that its ruler had died of natural causes.
The man who led the soldiers was Liu Su, the young client who had helped kill Zhang Yong. He was not a Zhang. He was a retainer from Dunhuang, and after the killing he was given the Zhang surname, renamed Zhang Dacheng, and treated as an adopted son. Another favorite, Liang Jing, became Zhang Dayi. The adopted sons were given names in the same series as Tianxi's own sons. This is a court that had stopped distinguishing between the family and the faction that served it. The killer became a son; the heir, Zhang Dahuai, was later demoted and replaced by a younger favorite, Zhang Dayu. The language of kinship was being used to do the work of politics, and it was wearing out.
What did not happen is as important as what did. The sources do not describe a general massacre of the Zhang clan after 363. They describe three narrower things: the destruction of Zhang Yong's faction in 361, the execution of Zhang Qin and his circle in 363, and the killing of the boy. The wider thinning of the house had happened earlier. Zhang Zuo had taken the throne from the boy Zhang Yaoling and killed him, and was himself killed in 355; their joint biography tells that story. Zhang Guan and his brothers were destroyed by the Song brothers, and the Song brothers by Zhang Yong. By the time Tianxi took the regency, the adult males of the house were mostly gone. By the time he took the throne, the only adult Zhang with a claim and an army was himself.
The Jinshu files Former Liang among its ordinary biographies rather than its memoirs of usurpers, and the long speeches in that biography are court rhetoric, not transcripts.

3. The Garden and the Lofty Hall

The same biography that records the killing records the garden. Tianxi, it says, gave frequent banquets in the parks and ponds and let the government drift. The biography also says he had literary talent and a reputation that traveled. A remonstrating officer, Suo Shang, sent up a long memorial urging him to stop. Tianxi answered with a little essay. He said he did not go out for pleasure; he went out because going out taught him something. The morning flowers reminded him to respect men of talent; the orchids reminded him to love ministers of virtue; the pine and bamboo reminded him of integrity; the weeds reminded him of greedy clerks; the wind reminded him of violent and cunning men. If one extended the lesson from one thing to another, nothing would be missed.
The court that produced the garden also produced a translation bureau. Liangzhou had been a Buddhist center since the Western Jin; the Weishu's treatise on Buddhism says that from Zhang Gui onward the region believed in the faith. Tianxi's reign is when the court itself became a patron. A Tang stele of 711 says the Dayun monastery at Liangzhou was founded by Zhang Tianxi in the Shengping years under the name Hongzang, and that its flower tower had a seven-storey wooden pagoda one hundred and eighty feet high. The stele is late, and foundation legends grow, but the outline is confirmed elsewhere: Tianxi gave over part of his palace for a monastery after a series of omens, and the foundation became one of the great shrines of the corridor.
The translation project is better documented. In 373 a Yuezhi layman named Zhi Shilun came to Guzang and was received by Tianxi. The prefect invited him to produce a set of sutras in the hall behind the official seat, and the work was done with a team: a prince of Kucha named Bo Yan interpreted the Sanskrit, three officials took down the Chinese, and two monks, Hui Chang and Jin Xing, checked the result. Four texts came out of the session, including the Shurangama. The record is a colophon, not a court panegyric, and it gives the names and the room. A catalogue compiled by the monk Dao'an listed fifty-nine works in seventy-nine scrolls from Liangzhou. The culture was real. So was the bill: the court that paid for translators had no adult kinsmen to command its armies.

4. Two Calendars

The foreign policy of Former Liang under Tianxi can be told as a series of dates. In 364 the Former Qin court invested him as general-in-chief, governor of Liangzhou, duke of Xiping. In 366 the Jin court made him general-in-chief, commander of the military affairs of Longyou and Guanzhong, governor of Liangzhou, duke of Xiping. The two sets of titles were almost the same, and he accepted both. A province that takes commissions from two enemies is telling each of them that it is a client, and telling neither the truth.
He could not afford to choose. The Qin was the stronger power and the closer threat; the Jin was the legitimate court and the source of the title that made his rule lawful. The Qin could send an army up the corridor; the Jin could send a commission. He needed the commission and feared the army. So he took the Qin's titles when they were offered and the Jin's when they arrived, and he dated his documents by the Jin calendar. The court had counted its years by the dead emperor's era of Jianxing until 361, when it changed to the living south's Shengping. Tianxi kept the southern count. A man who dates his papers by a southern era is saying that his province is still part of the southern order.
In 366 he broke with the Qin. The occasion is not clear in the sources; the result was a war by proxy in the upper Wei valley. A local strongman, Li Yan, held Fuhan and played the two powers against each other. In 367 Tianxi marched against him with three columns and a reserve, beat him in the field, and shut him in Fuhan. Li Yan sent his son to ask the Qin for help. Wang Meng came with a Qin army. The Liang force was defeated; the biography says two or three men in ten did not come back. The Qin captured Yin Ju, one of Tianxi's generals, and five thousand armored men. It was the first real test of the reign, and it showed the limit of the army: it could beat a local adventurer, but not a Qin field army.
The Qin did not follow up. It had other fronts and preferred clients to conquests. In 371 it took Chouchi, the mountain state of the Yang family, and sent Yin Ju and his men home with a letter from Wang Meng. The letter is preserved in the Tongjian, and it is a masterpiece of pressure that does not need an army. It reminded Tianxi that his ancestors had submitted to Liu Yao and Shi Le when they had to, because they understood the difference between strength and weakness. It said the east had been pacified and the six commanderies could not resist. It ended with the warning that six generations of work could end in a single morning.
Tianxi was frightened. He sent an apology and submitted. The Qin gave him the titles of commissioner with plenary powers, commander of the military affairs of the right of the Yellow River, fleet general, opener of the three departments, governor of Liangzhou, duke of Xiping. This was the second submission, and it was more explicit than the first. In 364 he had accepted a title; in 371 he accepted a status. The difference is the difference between a man who takes a gift and a man who admits he is a client.
In the same year he did something that made no sense if the submission was sincere. He built an altar outside Guzang, killed animals, and swore a pact with the three excellencies of the Jin from a distance, as if the southern court were present. He sent Han Bo with a petition and a letter to Huan Wen, proposing a joint campaign and a meeting at Shanggui. The sources differ on the date: the biography says the sixth year, the Tongjian says the following summer. It never happened. Huan Wen was dead by 373. The Jin was not going to send an army up the corridor to save a client who had already submitted to the Qin. The pact was a gesture, and gestures were what he had instead of an army. In 373 he sent tribute to the Jin court, a line in the annals that says more than the embassies.
The era name is part of this story. The Jinshu says Xuanjing changed the count from Jianxing to Shengping in 361, and that Tianxi kept the southern count. Documents from the corridor use Shengping, and later ones use Xian'an, the era of Emperor Jianwen, which began in 371. A few late tables give Tianxi an era of his own called Taiqing, and modern tables repeat it. It rests on a lost book and is contradicted by the paperwork. This essay does not use it. The ruler who would not take a crown was not going to take an era; the point of his titles was that he was a governor, and a governor does not rename the years.

5. The Account

In the seventh month of 376 the Former Qin envoys Yan Fu and Liang Shu arrived at Guzang with a summons. Tianxi was to come to Chang'an in person. It was not a request for tribute or a demand for a hostage; it was a demand that he leave his province and put himself in the power of the Qin court. He called his officials together and put the question to them: if I go, I will not come back; if I refuse, the army will come. What should I do?
The council is one of the most revealing scenes of the reign. The recorder Xi Le advised him to send a beloved son as a hostage, buy the army off with treasures, and wait for a better moment. It was the policy of a small state that had survived by postponing decisions, and it was the policy Tianxi had followed for thirteen years. The officials shouted him down. They said the house had served the Jin for generations, that its loyalty was known everywhere, that to bow to the Qin would shame the ancestors, that the river was a natural fortress, that the province could call on the Western Regions and the Xiongnu, and that no one could know in advance that a war would be lost. It was the speech of men who had not seen the Qin army.
Tianxi answered with a gesture rather than an argument. He rolled up his sleeves and said his mind was made up and anyone who spoke of surrender would be killed. Then he sent word to the envoys: do you want to go home alive or dead? They refused to be intimidated. He had them tied to the gate of the army camp and ordered the soldiers to shoot them, and he said that anyone who missed was not with him. The men shot until the envoys were dead. His mother wept and told him the Qin ruler had risen from a single province and conquered the east and the south, that a corner of the river could not resist him, and that killing his envoys made the end certain. He did not listen.
The Liang deployment was a cordon, not a concentration. Ma Jian was sent forward with twenty thousand men to hold the approaches. Chang Ju was posted at Hongchi with thirty thousand. Tianxi himself held Jincheng with fifty thousand. Zhao Chongzhe was given another fifty thousand as a reserve at the Red Bank. The numbers come from the Tongjian, and they are suspiciously large for a province of six commanderies. The Liang biography gives smaller figures and different names for two of the commanders, calling Ma Jian Ma Da and Chang Ju Zhang Ju. The two accounts were written from different files. The structure, however, is clear in both: the army was spread across the approaches, with the ruler in the center and the reserve behind him, waiting for a battle the Qin would choose.
The Qin did not choose the battle the Liang expected. Its columns crossed the Yellow River at two fords and came up the corridor. A detachment under Liang Xi, Yao Chang, Wang Tong and Li Bian crossed first and forced the surrender of a Liang garrison at the river confluence. Gou Chang crossed with the main body and took the town of Chansuo. Ma Jian, sent to hold the forward line, lost his nerve, fell back to Qingsai, and then surrendered with ten thousand men. The forward line was gone without a battle.
Chang Ju was left at Hongchi with a force that was now exposed. Gou Chang attacked him. His horse was killed under him, a subordinate named Dong Ru offered him his own mount, and Chang Ju refused it. He said he had three times commanded armies, twice held the axe and the baton, eight times led the palace guard, and ten times commanded troops in the field; that his trust and favor had been extreme; that this was the place where he was meant to die. He took off his helmet and armor in his tent, bowed toward the west, and killed himself with his sword. The speech is the kind of thing a court historian writes for a loyal general, and it may be the man's own. Either way, it is the last speech of the old Liang army. Xi Le was killed in the same collapse.
Tianxi still had the reserve. The fifty thousand at the Red Bank were the next to go. The Qin attacked and destroyed the force; the Tongjian says thirty-eight thousand were captured or killed and Zhao Chongzhe died. The number should be treated as an order of magnitude, not a count. What matters is that the reserve was gone. Tianxi came out of Jincheng to fight, and while he was outside the walls the city turned. The record does not say who opened the gate. It says only that the city revolted. He fled back to Guzang with a few thousand riders.
The flight to Guzang is the end of the military story and the beginning of the political one. He still had a capital, a garrison, a treasury, and the prestige of the title. He had lost the field army, but a siege is not a field battle. A ruler who intends to resist can close the gates and make the enemy buy the city. He did not. When the Qin army arrived, he came out with the white horse, the bound hands, and the coffin. Gou Chang untied him and burned the coffin, and the province was handed over.
Why? The sources give the bare fact and a word: he was cornered. The word is accurate and incomplete. He was cornered by a set of facts that had been accumulating for years.
The first was the army. The forward force had surrendered; the center had been broken; the reserve had been destroyed. The garrison of Guzang was a city guard, not a field army. Each of the three forces that might have fought a delaying action was gone before the enemy reached the capital.
The second was the city. Guzang had already turned once, while he was outside the walls. A siege would have been a fight with the notables inside the city as well as with the army outside. The Zhangs had ruled the corridor by negotiating with the great families; a siege would force those families to choose, and they had already begun to choose.
The third was the relief. In 371 he had sworn a pact with the Jin and sent Han Bo to Huan Wen. In 376 the Jin did make a gesture: Huan Chong moved troops on the Han and the Huai and sent a column toward Shouchun, hoping to draw the Qin off. It was a diversion, not a relief. When news of the fall arrived, the troops were withdrawn. The Western Regions and the Xiongnu, whom the war party had invoked, sent nothing. A siege would have been a wait for an army that was not coming.
The fourth was the house. By 376 the only adult male of the ruling line was Tianxi. His sons were children. The generals who might have held a district or raised a relief force were either dead, like Chang Ju and Zhao Chongzhe, or had surrendered, like Ma Jian. The court was full of clients and affines; it was empty of kinsmen. This is what "the house was empty" means. It was a count of adult males, not a metaphor.
The fifth was the terms. A house had been built for him in Chang'an before the campaign began. The Qin wanted a client, not a corpse; it wanted the corridor administered, not destroyed. The offer was life, rank, and a city that would not be sacked. The alternative was a siege, a storm, and a massacre. A man who had spent his life choosing the form over the substance could see the arithmetic.
None of this was cowardice. Cowardice would have fled before the envoys were killed. He had done the opposite: he made surrender harder, and then surrendered. The killing of the envoys was a ritual to bind his own followers, and when the army dissolved the ritual had no one left to bind. What remained was a ruler in a city that had already changed hands once, with no field army, no relief, and no adult kinsmen. He did what a man does when the account is already closed. He signed.
The ceremony was the exact form of submission: white cart, white horse, hands bound, coffin. Gou Chang's release and the burning of the coffin were the other half of the form. They said the surrender was accepted, the man would live, and the city would not be destroyed. It was the legal language of a vassal who had revolted and was being received back. Tianxi had never called himself king. He had called himself a governor and a duke, and a governor who submits is not a king who is conquered. The forms he had chosen in 363 were the forms that saved him in 376.
Former Liang was not destroyed by Former Qin. It was handed over, after its last ruler had settled an account. The Qin army was the collection agency. The debt had been accumulating since the day he took the regency.

6. The House in Chang'an

Chang'an received him as a trophy. The Tongjian says the house had been built before the army marched, and that he moved into it when he arrived. Former Qin made him Marquis of Guiyi and gave him the post of Northern Department Minister, the office that handled the northern frontier. The Liang biography says simply that he was made a minister; the Tongjian supplies the department. The difference is small, but it is the difference between a pension and a job. The Northern Department managed the steppe and the corridor, and putting the former ruler at that desk used his knowledge and displayed his submission.
For seven years he lived in Chang'an as a marquis and a minister. The sources say almost nothing about that life. The one event that matters belongs to another essay: in 383 he was with the Qin army at the Fei River, serving as a staff officer under Fu Rong, and when the line broke he crossed to the Jin. The battle belongs to the biography of Emperor Xiaowu; what belongs here is that he left. He had been a Qin client for seven years, and he left in the first hour of the defeat. The calculation had not changed: he had submitted to the stronger power, and when it broke he submitted to the next one.
The Jin received him with the language of restoration. An edict made him cavalier attendant and left outer secretary, and a second edict restored him as Duke of Xiping, the title his family had held from the old court. The second edict recalled the virtue of his ancestor Zhang Gui, the long service of the house, the violence that had ended it, and the pity of an heir who had come back to court. The title was real; the province was not. He was a duke without a duchy, a governor without a province, a man whose rank was a memory.
He was also, for a while, a celebrity. The Jinshu says he had literary talent and a reputation that traveled, and that when he came to the southern court he was well received. The reception did not last. The southern aristocrats regarded him as a captive king, and the court's kindness was mixed with condescension. The most famous exchange is with Sima Daozi, the prince of Kuaiji, who asked him what the west produced. Tianxi answered at once: the mulberries are sweet, the owl changes its voice, the cheese nourishes the nature, and men have no envy. The answer names four things the south did not have, and a fifth, the absence of envy, that the south had in abundance. The room laughed. The laugh was the point.
Later the tone changed. The Jinshu says his form and spirit became confused, that he held a rank but was no longer treated as an equal, and that in the Longan years the heir of Kuaiji, Sima Yuanxian, used to summon him for amusement. He was given the post of governor of Lujiang because he was poor, and the post was a stipend rather than a duty. Whether the confusion was an illness or a shelter is not recorded. A man who had spent his life being watched by two courts might have found it useful to be thought harmless.
Under Huan Xuan he was given the title of colonel protector of the Qiang and governor of Liangzhou, the old offices of his family, conferred by a usurper who wanted to advertise that the distant provinces were his. He could not go to Liangzhou; the corridor was ruled by other men. It was the last time the Zhang name was used as a warrant. Soon after, he died. The Jinshu gives no year, only an age; later tables have used the age to compute a year, but the computation is not a record. The year usually printed, 406, is a calculation; the rival date, 398, is incompatible with the notice that places his last appointment under Huan Xuan, who did not control the court until 402. This essay leaves the year open, as the record does. He was given the posthumous name Dao, the Mourned.

7. The Empty House

The fall of Former Liang is usually told as a story of a strong enemy and a weak ruler. The strong enemy is real: Former Qin of 376 was the greatest military power in the north, and the corridor was a narrow strip of oasis towns between the mountains and the desert. The weak ruler is also real, in the sense that Tianxi was not the man his father had been. But the explanation is too simple, because it makes the outcome a matter of character. The outcome was a matter of structure. The state had been emptied from the inside before the Qin arrived.
By 376 the house had a ruler, a boy heir, and no adult prince. The army had generals, but the generals were clients, not kinsmen; the greatest of them, Chang Ju, was a professional soldier who died at Hongchi, and the others were men like Ma Jian, who surrendered when the odds turned. The court had officials, but the officials were the great families of the corridor, and their loyalty was to the province, not to the house. When the Qin came, the province did what provinces do when the ruling house has spent its credit: it changed masters.
This is what "the house was empty" means. It does not mean every Zhang was dead. It means the Zhangs had used up the one resource a dynastic state cannot buy: adult male kin who can be trusted with an army. The Qin did not create that condition. It arrived to find it. The campaign of 376 was competent, but not extraordinary. A larger army moved up a corridor against a smaller one, and the smaller one dissolved. The interesting question is not why the Qin won. It is why the Liang army did not fight for its own capital. The answer is that the army had already been fighting a different war for ten years, and the war was inside the house.
The comparison with Northern Liang can be stated in a sentence. A generation later, the Juqu house would die of the same disease: it spent its men on itself, and the northern army arrived to collect. The details belong to another essay. The corridor produced states that were rich, cultured, and fragile, because their wealth came from trade and their security came from a balance of powers. When the balance broke, the culture was not a defense.
This is why the surrender was not a sudden collapse. It was the last step in a long accounting. He had counted the field army and found it gone; counted the relief and found it a diversion; counted the kinsmen and found none; counted the city and found it unreliable; counted the terms and found them acceptable. The white horse and the coffin were the form of the conclusion, not the conclusion itself. The conclusion had been reached years earlier, in the palace, when he decided that a boy's life was a smaller cost than a shared throne.
Former Liang had lasted seventy-six years and nine rulers, longer than any other state of its age. It ended not with a battle but with a contract. The last ruler came out of the gate in white, with his hands tied, and the commander of the enemy army untied him and burned the coffin. The ceremony said the province had changed hands and the man had been received back into the order of vassals. It was a small, orderly end to a state that had spent its last decade killing its own heirs. The Qin army did not have to storm the city. The city had already been surrendered, in the only currency that mattered, by the man who knew its accounts best.