Bu Chan

Biography & Historical Record

Bu Chan, courtesy name Zhongsi, was a high-ranking military commander, regional governor, and nobleman serving the Eastern Wu state before his dramatic defection to the Western Jin dynasty. Hailing from Huai’an County in Linhuai Commandery, Bu Chan was the second son of Bu Zhi, the former Chancellor of Eastern Wu and one of the most influential founding officials of the Sun royal clan. Documented in Chen Shou’s official dynastic history Records of the Three Kingdoms (Sanguozhi – Book of Wu, Volume 52, Biography of Bu Zhi) and Sima Guang’s Zizhi Tongjian, Bu Chan inherited the immense prestige and power of his father’s house, which had governed the strategic frontier fortress of Xiling (modern-day Yichang, Hubei Province) for over forty years.

In 265 AD, following the death of his elder brother Bu Xie, Bu Chan inherited his brother’s military command and noble titles, becoming the Xiling Governor (Xiling Du) and receiving the rank of General Who Manifests Martial Might (Zhaowu Jiangjun). For decades, the Bu clan had functioned as a semi-autonomous power bloc in Xiling, maintaining deep ties with the local gentry and tribal leaders. In 272 AD, the tyrannical and paranoid Emperor Sun Hao of Eastern Wu, suspicious of the Bu clan’s lingering influence, issued a sudden imperial decree summoning Bu Chan to return to the capital at Jianye to serve as the Commander of the Imperial Guards. Fearing that this recall was a calculated trap by political rivals to execute him and dismantle his family’s base, Bu Chan fell into a state of mortal terror.

Driven by the fear of imminent death, in September 272 AD, Bu Chan barricaded the gates of Xiling and formally declared his defection to the Western Jin dynasty. He sent his nephews to the Jin capital, Luoyang, as hostages to secure military assistance. The Western Jin court, eager to exploit the strategic rift in Eastern Wu, immediately appointed Bu Chan as General of the Guards (Wei Jiangjun) and Governor of Jiaozhou, promising him full imperial support. This act of betrayal by one of the empire’s most powerful families sent shockwaves throughout Eastern Wu and created a strategic crisis along the Yangtze River.

In response, Sun Hao dispatched the supreme general and Imperial Grand Marshall Lu Kang (son of the legendary Lu Xun) to lead a grand expedition against the traitor. Lu Kang executed a masterful strategic campaign, constructing a double defensive line to simultaneously besiege Xiling and block the Western Jin relief army led by Yang Hu. Despite Yang Hu’s aggressive attempts to break the encirclement, Lu Kang successfully repelled all Jin reinforcements. With his rescue impossible and his defensive lines shattered, the fortress of Xiling fell to Lu Kang’s relentless assault. Bu Chan was captured alive. To deter any further rebellion among the border generals, Lu Kang executed Bu Chan and ordered the complete extermination of his entire clan (chu-zhi san-zu), effectively ending the long-standing power of the Bu family in Eastern Wu.

Role in Romance of the Three Kingdoms

In Luo Guanzhong’s classic 14th-century historical novel Romance of the Three Kingdoms, Bu Chan’s betrayal and subsequent execution are mentioned in the later chapters documenting the terminal decline of the Eastern Wu state. His defection is presented as a tragic final example of the internal political rot that permeated Sun Hao’s reign, serving as the dramatic culmination of Lu Kang’s military brilliance in defending the borders of the empire against both internal traitors and external Jin incursions.

Bu Chan (步闡) — Historical & Literary Timeline

Key Relationships

Family

• Bu Zhi (步骘, Bộ Chất): Biological father; founding statesman and Chancellor of Eastern Wu who established the Bu family’s multi-decade military governance and power base at Xiling.
• Bu Xie (步协, Bộ Hiệp): Elder brother; general and commander of Xiling whose death in 265 AD allowed Bu Chan to inherit the family’s military command and noble titles.
• Bu Xuan (步璇, Bộ Tuyền): Nephew (son of Bu Xie); sent to the Western Jin capital of Luoyang as a hostage in 272 AD to secure imperial military support, surviving the purge of the Bu clan.

Friends

• Yang Hu (羊祜, Dương Hỗ): Western Jin supreme commander who coordinated the external relief offensive during the Siege of Xiling in 272 AD to support Bu Chan’s defection, though his forces were ultimately repelled.

Enemies

• Lu Kang (陆抗, Lục Kháng): Supreme military commander of Eastern Wu who besieged Xiling in 272 AD, constructed double defensive lines to block Jin reinforcements, captured the fortress, and had Bu Chan executed alongside his garrison leaders.

Other

• Sun Hao (孙皓, Tôn Hạo): Last Emperor of Eastern Wu; his paranoid administration and sudden imperial summons in 272 AD incited Bu Chan’s mortal fear of execution, directly triggering Bu Chan’s rebellion.
• Sima Yan (司马炎, Tư Mã Viêm): Emperor Wu of Western Jin; accepted Bu Chan’s defection in 272 AD, awarded him high court titles including General of the Guards and Governor of Jiaozhou, and dispatched relief forces to assist him.