Duke Mu of Qin
Duke of Qin, sometimes counted among the Five Hegemons.
Gary Todd from Xinzheng, China · CC0
Duke Mu of Qin, born Ying Renhao and died in 621 BC, ruled the state of Qin. He is often counted among the Five Hegemons of the Spring and Autumn period and significantly enlarged Qin’s lands while King Xiang of Zhou was on the throne. His reign was marked by the service of several gifted advisers, including Baili Xi, Jian Shu, Pi Bao, and Gong Sun.
His full name follows Chinese naming conventions: Ying is the surname, Renhao the given name. In his own time, he was simply called Qin or the Duke of Qin (Qingong). The title Qin Mugong, meaning “Solemn Duke of Qin,” is a posthumous name given by later generations for ancestral worship. Although it is a description, English usage often treats it as a proper name. All these forms reflect modern Mandarin pronunciation; the Old Chinese pronunciations would have sounded different.
Duke Mu was the son of Duke De of Qin and the younger brother of Duke Cheng. He married Mu Ji, daughter of Duke Xian of Jin, and later gave his own daughter Huai Ying in marriage to two of Duke Xian’s sons. He aided his son-in-law in winning the Battle of Chengpu against Chu. These marriages gave rise to the phrase “the Friendship of Qin and Jin,” used to describe political marriages and alliances sealed by family ties. He is also remembered as the master of Bole, a famed horse expert whose skills became legendary in folklore and idioms.
Early in Duke Mu’s rule, Jin was a strong state under Duke Xian. After Duke Xian died, Jin fell into civil war as his sons fought for the throne. One son became Duke Hui of Jin, but soon a famine struck Jin, and Duke Hui asked Qin for help. Duke Mu sent food supplies and farming tools. Later, when Qin suffered its own famine, Jin—now recovered—attacked instead of repaying the aid. Qin and Jin fought several battles over the following years.
During these conflicts, Duke Mu learned that Duke Hui’s older brother, Ji Chong’er, had wandered from the north and east to the southern court of Chu. After consulting his advisors, Duke Mu sent an envoy to Chu to invite Chong’er to Qin. When Duke Hui died, his son fled from captivity in Qin to claim the Jin throne. Duke Mu instead sent his army to install Chong’er as duke, defeating Jin at the Battle of Gaoliang. Chong’er, now Duke Wen of Jin, was grateful, and relations between Qin and Jin improved. With its eastern border stable, Qin then launched campaigns against western tribes.
At that time, Qin and Jin were the most powerful states in China. Duke Wen of Jin expelled the Di barbarians, driving them west of the Yellow River between the Yun and Luo rivers, where they became known as the Red Di and White Di. Soon after, Duke Mu of Qin, having secured the services of You Yu, persuaded eight western barbarian tribes to submit to his authority.
West of Long lived the Mianzhu, Hunrong, and Diyuan tribes. North of Mounts Qi and Liang and the Jing and Qi rivers were the Yiqu, Dali, Wuzhi, and Quyuan tribes. North of Jin were the Forest Barbarians and the Loufan, while north of Yan lived the Eastern Barbarians and Mountain Barbarians. These groups were scattered in separate valleys, each with its own chieftain. They sometimes gathered in groups of about a hundred, but no single tribe could unite them.
In 627 BC, Duke Mu planned a secret attack on the State of Zheng, but the Qin army retreated after being tricked into thinking Zheng was ready. Duke Wen had died, and his successor, Duke Xiang of Jin, ambushed the retreating Qin army at the Battle of Yao, near present-day Luoning County, Henan. Qin suffered heavy losses. Three years later, Qin attacked Jin in revenge and won a major victory. After holding a funeral for those killed at Yao, Duke Mu stopped advancing east and returned to Qin’s traditional policy of expanding westward. His western campaigns and his handling of relations with Jin earned him a place among the Five Hegemons.
Duke Mu had at least two known sons: Ying, who succeeded him as Duke Kang of Qin, and Hong. He also had several known daughters: Huai Ying (married to Dukes Huai and Wen of Jin), Wen Ying (married to Duke Wen of Jin), Qin Ying (married to King Gong of Chu), Jianbi, and Nongyu (married to Xiao Shi). It is uncertain whether Huai Ying and Wen Ying were the same person, and some scholars argue that Jianbi and Nongyu might also be conflated.
His great-great-grandfather was Duke Wen of Qin; his great-grandfather, Duke Jing of Qin; his grandfather, Duke Xian of Qin; his father, Duke De of Qin. His brothers were Duke Xuan of Qin and Duke Cheng of Qin. His wife, Lady Mu (c. 672–637 BC), was the sister of Shensheng. His son, Duke Kang of Qin, died in 609 BC. His daughters include Huai Ying (650–620 BC), Wenying, Jianbi, and Nongyu.
In the manga and anime series *Kingdom*, as well as a oneshot by Yasuhisa Hara, Duke Mu made an alliance with mountain tribes after they devoured his horse, even giving them wine. He later fought against Jin and was rescued by those same barbarians.
- born
- Ying Renhao
- field
- Ruler, military leader
- nationality
- State of Qin (ancient China)
- known_for
- Expansion of Qin, Five Hegemons, Friendship of Qin and Jin
Lore & Background
Duke Mu was the son of Duke De of Qin and the younger brother of Duke Cheng. He married Mu Ji, the daughter of Duke Xian of Jin, and married his daughter Huai Ying to two of Duke Xian's sons. These marriages led to the saying 'the Friendship of Qin and Jin,' denoting political alliances based on marital bonds. He is also noted as the master of Bole, a famous horse expert whose skills became iconic in folklore and idioms. During his early reign, Jin was a formidable power under Duke Xian, but after Duke Xian's death, Jin fell into internal conflict as his sons fought over succession. Duke Mu sent relief food supplies and agricultural equipment to Jin during a famine, but when Qin later suffered famine, Jin attacked instead of repaying the aid. After several battles, Duke Mu heard that Duke Hui's older brother Ji Chong'er was at the court of Chu, and after consulting his subjects, sent an emissary to invite Chong'er to Qin. Upon Duke Hui's death, Duke Mu sent his army to establish Chong'er as Duke Hui's successor, defeating the Jin army at the Battle of Gaoliang. Chong'er, now Duke Wen of Jin, was grateful, and relations improved. With his eastern front stable, Qin launched campaigns against western minority tribes. Having obtained the services of You Yu, Duke Mu succeeded in getting the eight barbarian tribes of the west to submit. In 627 BC, Duke Mu planned a secret attack on Zheng, but the Qin army retreated after being tricked into believing Zheng was prepared. Duke Wen had died, and his successor Duke Xiang of Jin ambushed the retreating Qin army at the Battle of Yao, near present-day Luoning County, Henan Province, causing heavy casualties. Three years later, Qin attacked Jin in revenge and scored a major victory. Duke Mu refused to advance further east after holding a funeral service for those killed at Yao, and focused on expanding Qin's borders in the west. His achievements in the western campaigns and his handling of foreign relations with Jin earned him a position among the Five Hegemons.
Reader's Guide
Duke Mu of Qin is significant for his role in expanding Qin's territory and for his diplomatic and military strategies that earned him a place among the Five Hegemons of the Spring and Autumn period. His handling of relations with the state of Jin, including the famous 'Friendship of Qin and Jin' political marriages, stabilized his eastern front and allowed him to focus on conquering western barbarian tribes. His achievements in the western campaigns and his foreign relations with Jin are the basis for his hegemonic status. Duke Mu's legacy includes his patronage of talented advisors and his association with the horse expert Bole, whose skills became iconic in folklore and idioms. The uncertainty over the names of his daughters (Huai Ying and Wen Ying possibly being the same person) reflects the complexities of historical records from this period.
Did You Know?
- Duke Mu's posthumous title 'Mu' means 'Solemn' and was bestowed by his successors as part of Chinese ancestral veneration.
- He married his daughter Huai Ying to two different sons of Duke Xian of Jin.
- He is noted as the master of Bole, a famous horse expert whose skills became iconic in folklore and idioms.
- After the Battle of Yao in 627 BC, Duke Mu held a funeral service for those killed in action before refusing to advance further east.
- He obtained the services of You Yu, which helped him get eight barbarian tribes of the west to submit to Qin's authority.
Roots in the Western Marches
The state that Duke Mu would later command traces its lineage to the legendary Five Emperors, specifically Zhuanxu. One of his descendants, Boyi, received the family name Ying from Emperor Shun. During the Xia and Shang periods, this clan divided into two: a western branch that migrated across the Ordos Plateau to a settlement called Quanqiu, and an eastern branch that settled in what is now Shanxi and became the ancestors of the Zhao rulers. The western branch served as a buffer against the Xirong nomads on behalf of the Shang dynasty. A defining moment arrived when Feizi, a younger son of a Shang-era lord, demonstrated exceptional horse-breeding skill before King Xiao of Zhou. Impressed, the king granted him a separate fief in the Qin valley of modern Gansu and named his seat Qinyi. This horse-breeder ancestor became the founding figure of the Qin line, and modern scholars have noted that this connection to equine husbandry may hint at partial nomadic heritage among the Ying family, a thread that would echo through generations of Qin identity.
Blood, Sacrifice, and the Rong Threat
The early Qin line was shaped by relentless conflict with the Xirong. In 842 BC, a noble revolt against the corrupt King Li of Zhou plunged the realm into chaos, and the Rong seized the opening to attack and exterminate the senior Ying branch at Quanqiu. Only the cadet line at Qinyi survived. When King Xuan of Zhou ascended in 827 BC, he placed Qin Zhong, Feizi's great-grandson, in command of forces against the Rong. Qin Zhong fell in battle in 822 BC, and his son Duke Zhuang inherited the struggle. In recognition of Qin Zhong's loyalty, King Xuan granted the Qin brothers 7,000 soldiers, and they defeated the Rong and reclaimed their lost ancestral lands. Duke Zhuang's eldest son Shifu later turned down the succession to continue fighting the Rong, while his brother Duke Xiang arranged a marriage alliance with a Rong king in a bid for peace. This cycle of warfare, personal sacrifice, and desperate diplomacy forged the martial character of the state for generations to come.
The Barbarian Stigma and the Huaxia Assertion
The Central Plains states looked down on Qin, Yan, and Chu as culturally inferior because of their peripheral positions. A Wei noble as late as 266 BC still remarked that Qin shared customs with the Rong and Beidi tribes. The Ying clan had lived amid Rong territories for generations, sometimes clashing with their armies and sometimes intermarrying with their kings. After the Zhou collapse, Qin absorbed cultural elements from both the Rong and Beidi, deepening the perception of otherness among its rivals. Yet the state was acutely sensitive to this discrimination and worked deliberately to assert its Huaxia identity. Qin law classified mixed-ethnicity offspring as Huaxia, and the state showed a marked preference for recruiting soldiers from the neighboring state of Jin rather than relying solely on local populations. Qin was also the second state after Zhao to adopt nomadic cavalry tactics, blending foreign military innovation with a determined effort to be recognized as a legitimate Chinese power rather than a frontier curiosity.
Elevation and the Royal Promise of the West
The transformation of Qin from a minor attached state into a full autonomous vassal came through Duke Xiang's service to the Zhou court. In 771 BC, the Marquess of Shen, the state of Zeng, and the Quanrong nomads jointly sacked the Zhou capital at Haojing, killing King You and ending the Western Zhou dynasty. Duke Xiang led his troops to escort the young King Ping to Luoyi, where the Eastern Zhou capital was established. In gratitude, King Ping formally enfeoffed Duke Xiang as a feudal lord, elevating Qin from a fuyong—a minor state with limited self-rule under another lord's authority—to a major vassal with full autonomy. King Ping further promised to permanently grant Qin all lands west of Qishan, the former Zhou heartland, provided the state could expel the Rong occupying it. This royal promise became a driving force for successive Qin rulers, who launched repeated campaigns against the Rong and expanded their territory far beyond the original ancestral lands, eventually viewing the Zhou kings Wen and Wu as their own predecessors.
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