Biography
Early life
Sun Deng was born in 209 CE in Jingkou.
He was Sun Quan’s eldest son.
His birth mother was of low status, and he was raised by Lady Xu, Sun Quan’s wife.
Appointed as Crown Prince
In 221 CE, the second year of Huangchu, Sun Quan submitted to Cao Wei and was enfeoffed as King of Wu.
Sun Quan appointed Sun Deng as General of the East and wanted to enfeoff him as a marquis with ten thousand households.
However, Sun Deng, who was only twelve years old, declined the marquis title (some sources say he claimed illness).
In the same year, Sun Quan made Sun Deng Crown Prince and selected teachers and excellent scholars as his guests and friends.
Sun Quan appointed Zhuge Ke, son of Zhuge Jin, Administrator of Nan Commandery; Zhang Xiu, son of Zhang Zhao, General Who Spreads Might; Gu Tan, grandson of Gu Yong, Chancellor; and Chen Biao, son of Chen Wu, General of the Vanguard, to enter the palace and serve as Sun Deng’s tutors in poetry and books and accompany him in riding and archery.
Marriage
In 225 CE, the fourth year of Huangwu, Sun Quan arranged for Sun Deng to marry the daughter of Zhou Yu as Crown Princess.
He ordered Cheng Bing to welcome Lady Zhou from Wu Commandery to Wuchang and teach Sun Deng.
Sun Quan attached great importance to this marriage.
Later, the daughter of Rui Xuan was also arranged to be a consort.
The Four Friends
In 229 CE, the first year of Huanglong, Sun Quan became emperor and made Sun Deng Crown Prince.
Sun Deng ordered Hu Zong, Palace Attendant, to create a list of guests.
He appointed Zhuge Ke as Commandant of the Left Assistant, Zhang Xiu as Commandant of the Right Assistant, Gu Tan as Commandant of the Assistant, and Chen Biao as Commandant of the Wing Assistant, calling them the “Four Friends.”
Xie Jing, Fan Shen, Diao Xuan, and Yang Dao were all guests.
Therefore, the Eastern Palace was known for having many famous scholars and talented people.
Governing Wuchang
In the same year, Sun Quan moved the capital to Jianye and left Sun Deng, the various princes, and the Nine Ministers of the Secretariat at Wuchang.
He summoned Lu Xun, Grand General, to Wuchang to oversee affairs at Wuchang and teach the various princes, assisting Sun Deng together with Shi Yi, Director of the Imperial Secretariat.
Sun Deng handled affairs carefully and appropriately, always consulting first before acting.
Requesting instruction from Bu Zhi
Sun Deng loved talent and enjoyed hearing good words.
He therefore wrote a letter to Bu Zhi requesting instruction.
Bu Zhi then listed eleven people who held important positions in Jing Province: Zhuge Jin, Lu Xun, Zhu Ran, Cheng Pu, Pan Jun, Pei Xuan, Xiahou Cheng, Wei Jing, Li Su, Zhou Tiao, and Shi Gan.
He introduced and analyzed their conduct and abilities one by one and submitted a memorial hoping that Sun Deng would trust and employ these outstanding talents.
Managing the rear
In 232 CE, the first year of Jiahe, Sun Deng’s second brother Sun Lü died.
Sun Quan was sad and therefore reduced his meals.
Sun Deng travelled day and night and rushed to Laixiang to personally report.
Sun Quan immediately summoned him.
When Sun Deng saw Sun Quan weeping in grief, he advised: “Sun Lü’s illness could not be cured. This was fate. Now the north is not yet unified, and all under heaven are looking up in hope. Heaven has given Your Majesty a mandate, but Your Majesty is following the thinking of lowly common people and reducing the meals of court ministers, exceeding the requirements of ritual. I privately worry and am uneasy.”
Sun Quan followed his advice and increased his meals.
Sun Deng stayed for more than ten days.
Sun Quan wanted him to return west to Wuchang.
Sun Deng deeply pleaded for himself, believing that a long separation made him unable to serve his parents, which was lacking in filial duty.
He also stated that Lu Xun was loyal and diligent and that there was nothing to worry about in Wuchang.
Sun Quan therefore let him stay.
Campaign against Hefei Xincheng
In 234 CE, the third year of Jiahe, Sun Quan led troops to attack Hefei Xincheng of Wei and ordered Sun Deng to remain behind and manage rear affairs.
At that time, agricultural harvests were poor, and bandits increased.
Sun Deng therefore established laws to deal with bandits and achieved good results.
Relationship with Sun He
Sun Deng had a good relationship with his half-brothers.
According to the Wu Shu, Sun He, Sun Deng’s third brother, was favoured by Sun Quan when young because his mother was favoured.
Sun Deng was close to Sun He and treated him like an older brother, often showing the idea of yielding the position to Sun He.
Remonstrating against Lü Yi
Sun Quan once greatly trusted Lü Yi, a school official, and had him oversee the various officials and handle legal cases.
Lü Yi took advantage of this to manipulate power and act arbitrarily.
He enforced laws very harshly, and the various officials suffered greatly.
Sun Deng repeatedly remonstrated about this.
Death
In the fifth month of 241 CE, the fourth year of Chiwu, Sun Deng died at the age of thirty-three.
When Sun Quan learned of this, he was shocked and saddened and could not control his grief.
His edict mentioned: “The state has lost its bright heir. What fortune do the people have!”
Final memorial
Before Sun Deng died, he submitted a memorial saying: “I, with no virtue, am afflicted with serious illness. I know I am confused and am afraid I will die. I am not cherishing myself, but I think of leaving my parents and being buried in yellow earth, never again able to serve in the palace or see the emperor and empress. In life, I was of no benefit to the state. After death, I will leave Your Majesty deep grief. Therefore, I cannot help but feel sorrowful and choked up. Now the great affairs of the realm are not yet settled, and the bandits in various places have not been pacified. The people of the realm look up in hope and entrust their fate to Your Majesty. Those in danger hope for stability, and those in chaos hope for order. I hope Your Majesty will completely forget me, cut off common feelings of love, cultivate the arts of Huang-Lao, focus on nourishing your spirit, increase fine food and drink, and broaden your divine thoughts to benefit the foundation of achievements for ten thousand generations. Then the people of the realm will be fortunate to have something to rely on, and I will die without regret.”
He praised Lu Xun as loyal and diligent, concerned about the state, upright in public service, and having the integrity of not turning back.
He also believed that Zhuge Jin, Bu Zhi, Zhu Ran, Quan Cong, Zhu Ju, Lü Dai, Wu Can, Kan Ze, Yan Jun, Zhang Cheng, and Sun Yi were all loyal to the state and understood governance.
He hoped that Sun Quan would employ them more closely to make Wu prosperous.
The memorial was submitted only after he died.
Sun Quan was even more saddened and could not help but weep whenever he spoke of Sun Deng.
He posthumously titled Sun Deng Crown Prince Xuan.
Aftermath
Xie Jing, a former subordinate of Sun Deng who was then Administrator of Yuzhang, heard of the Crown Prince’s death and was overcome with grief.
He abandoned his office and rushed to mourn.
Afterward, he submitted a memorial impeaching himself for leaving his post without authorization.
Sun Quan comforted him: “You served the Crown Prince, which is different from other officials.”
He sent an envoy to console him, allowed him to resume his original position, and sent him back to his commandery.
Sun Deng was initially buried at Jurong, and a garden estate was established to guard it according to law.
Three years later, he was reburied at Jiangling.
Personality
Sun Deng was known for being virtuous, talented, humble, and respectful.
He treated his subordinates as equals and did not require strict hierarchical etiquette.
He loved talent and enjoyed hearing good words.
He was also known for his filial piety and his concern for the state.
Military achievements
Managing the rear
Sun Deng managed rear affairs when Sun Quan campaigned against Hefei Xincheng and established laws to deal with bandits, achieving good results.
Relationships
With Sun Quan
Sun Deng had a close relationship with Sun Quan, who greatly loved him and made him Crown Prince.
Sun Quan was devastated by Sun Deng’s death and said: “The state has lost its bright heir. What fortune do the people have!”
With Lady Xu
Sun Deng was raised by Lady Xu and was grateful to her.
When Lady Xu was exiled to Wu Commandery because of jealousy, Sun Deng still remembered her kindness.
When Sun Deng was about to be made Crown Prince, he said: “For the foundation to be established, righteousness must be produced. To establish a Crown Prince, a queen should first be established.”
When Sun Quan asked where his mother was, Sun Deng replied: “In Wu Commandery.”
Sun Quan was silent.
With the Four Friends
Sun Deng had close relationships with Zhuge Ke, Zhang Xiu, Gu Tan, and Chen Biao, the Four Friends.
He treated them as equals and often rode in the same carriage or slept together with them.
With Sun He
Sun Deng had a good relationship with his half-brother Sun He and often showed the idea of yielding the position to him.
Anecdotes
The pellet incident
When Sun Deng was in Wuchang, he once went out riding.
A pellet flew past him.
His guards searched for the person who shot the pellet.
They found a person holding a slingshot and carrying pellets, and everyone believed this was the person who shot the pellet.
However, the person denied it and would not submit.
The attendants wanted to beat him, but Sun Deng would not allow it.
He sent someone to find the pellet that had flown past him and compare it with the ones the person was carrying.
They were not the same, so he released the person.
The golden horse water vessel
Another time, a golden horse water vessel was lost.
The thief was found, and it turned out to be one of Sun Deng’s own subordinates.
Sun Deng could not bear to punish him severely and only called him to reprimand him, sent him home forever, and ordered those around him not to spread the news.
The egg and horse dung joke
Sun Deng once teased Zhuge Ke with horse dung.
Zhuge Ke responded with an egg, saying they both came from the same place.
This shows Sun Deng’s playful side and his close relationship with Zhuge Ke.
Filial piety to Lady Xu
When Lady Xu sent people to give Sun Deng clothes, Sun Deng would always bathe before wearing them.
This shows his respect and gratitude to his stepmother.
Achievements
- Established laws to deal with bandits
- Managed rear affairs during campaigns
- Remonstrated against harsh laws
- Selected and employed talented people
- Maintained good relationships with subordinates
Behind the scenes
Historical sources
Sun Deng’s biography appears in the Records of the Three Kingdoms by Chen Shou, where he is grouped with Sun Lü, Sun He, Sun Ba, and Sun Fen.
The biography records his virtue, talent, and early death.
The Four Friends
Sun Deng’s Four Friends—Zhuge Ke, Zhang Xiu, Gu Tan, and Chen Biao—were all talented young men from prominent families.
They helped Sun Deng learn and govern.
Early death
Sun Deng’s early death at age 33 was a great loss for Eastern Wu.
Many historians believe that if Sun Deng had lived, the history of Eastern Wu might have been different, as he was known for his virtue and talent.
Historical evaluations
Contemporary
Chen Shou wrote: “Sun Deng’s heart and mind were sufficient to be called beautiful virtue.”
He also wrote: “He loved people and enjoyed goodness.”
Sun Quan said: “The state has lost its bright heir. What fortune do the people have!”
Later historians
Ye Shi wrote: “Sun Deng had both virtue and ability. He knew people and was wise. He deeply understood governance. His final memorial—whether in the Three Dynasties before or after—there are few Crown Princes or Princes who can match him. Compared to him, Cao Pi and Cao Zhi are not worth mentioning.”
Legacy
Sun Deng is remembered as one of the most virtuous and talented Crown Princes in Chinese history.
His early death is often cited as one of Eastern Wu’s greatest losses.
His story represents both promise and tragedy—a Crown Prince who showed great virtue and talent but died before he could succeed to the throne.
Timeline
- 209 CE: Born in Jingkou; son of Sun Quan; raised by Lady Xu
- 221 CE: Appointed as General of the East; declined marquis title; made Crown Prince; teachers and guests selected
- 225 CE: Married daughter of Zhou Yu as Crown Princess
- 229 CE: Made Crown Prince when Sun Quan became emperor; appointed Four Friends; left at Wuchang to govern
- 232 CE: Advised Sun Quan not to reduce meals after Sun Lü’s death
- 234 CE: Managed rear affairs during campaign against Hefei Xincheng; established laws to deal with bandits
- 237 CE: Close friend Chen Biao died; Sun Deng built a house for his family
- 241 CE: Died in fifth month age 33; posthumously titled Crown Prince Xuan; buried at Jurong, later reburied at Jiangling
See also
References
- Chen Shou. Records of the Three Kingdoms, Volume 59, Biography of the Five Sons of the Wu Lord.
- Pei Songzhi. Annotations to Records of the Three Kingdoms.