The Problem of Two Hans

The Problem of Two Hans

The Han dynasty (汉朝) is really two dynasties. The Western Han (西汉, 202 BCE to 9 CE) had its capital at Chang’an, in the west. The Eastern Han (东汉, 25 to 220 CE) had its capital at Luoyang, in the east. Between them sat the brief Xin dynasty of Wang Mang, who interrupted the Liu family’s rule for fifteen years. Ban Gu’s Book of Han (汉书, Hanshu) is nominally a history of the Western Han. But the question of how to handle the transition between the two halves of Han is one of the most fascinating structural problems in the entire work.

Ban Gu lived in the Eastern Han. He served the Eastern Han court. His history covers the Western Han. This means he was writing about a predecessor regime that shared his own dynasty’s name and lineage but was separated by a violent interruption. The Hanshu is not simply a dynastic history. It is an argument about political continuity, legitimacy, and the proper boundaries of historical narration.

Why Ban Gu Stopped at the Western Han

The most obvious choice would have been to write a history of the entire Han dynasty, Western and Eastern together. Ban Gu did not do this. He ended his history with the fall of the Western Han and Wang Mang’s usurpation. The Eastern Han, his own era, is not covered.

There are several reasons for this. First, Ban Gu was following the model of the Shiji, which Sima Qian had ended with his own era. Writing about one’s own dynasty while it is still unfolding presents obvious problems: you cannot evaluate living emperors, and contemporary politics make objective history dangerous. Ban Gu chose to treat the Western Han as a completed period, one with a clear beginning and end.

Second, the Western Han had a natural narrative arc. It began with Liu Bang’s improbable rise from peasant to emperor, peaked under Emperor Wu’s expansionist glory, declined through factional struggle and weak successors, and ended with Wang Mang’s usurpation. That is a complete story with a beginning, middle, and end. The Eastern Han was still unfolding when Ban Gu wrote, and its arc was not yet visible.

The Wang Mang Problem

Wang Mang (王莽) is the hinge of the Hanshu. He was a Han official who seized the throne, declared the Xin (新, “New”) dynasty, and attempted radical reforms that contributed to widespread rebellion. After fifteen years, the Liu family restored Han rule under Emperor Guangwu, beginning the Eastern Han.

Ban Gu had to decide how to treat Wang Mang. If he treated him as a legitimate emperor, he undermined the argument of Han continuity. If he erased him entirely, he left a fifteen-year gap in the historical record. His solution was to include Wang Mang in the annals but frame his reign as an interregnum rather than a legitimate dynasty.

The Basic Annals end with the reign of Emperor Ping, the last Western Han emperor. Wang Mang’s period is described but not given the same formal treatment as legitimate reigns. This is a subtle but powerful editorial choice. By structurally excluding Wang Mang from the main annal sequence, Ban Gu preserves the narrative of unbroken Liu family legitimacy.

The Argument of Continuity

By ending the Hanshu at the fall of the Western Han, Ban Gu was making a specific argument: the Western Han was a complete historical unit. It had a founding, a flourishing, a decline, and a fall. This completeness made it suitable for the kind of comprehensive history he wanted to write.

But the Eastern Han’s existence complicated this framing. If the Liu family regained the throne after Wang Mang, then the Western Han was not really the end of the Han story. It was a chapter, not a book. Ban Gu solved this by treating the Western Han as a self-contained period whose story could be told completely, while acknowledging that the Liu family continued to rule in the east.

This argument about continuity was politically important. The Eastern Han court needed to claim that its rule was a restoration of the Western Han, not a new dynasty. By treating Wang Mang as an illegitimate interruption rather than a legitimate successor, Ban Gu provided historical backing for the Eastern Han’s claim to be the same dynasty, merely relocated.

The Book of the Later Han as a Companion

Because Ban Gu stopped at the Western Han, the Eastern Han needed its own historian. That role was eventually filled by Fan Ye (范晔), who wrote the Book of the Later Han (后汉书, Hou Hanshu) roughly three centuries later. Together, the Hanshu and Hou Hanshu form a matched pair, each covering one half of the Han dynasty.

The two works follow the same structural template, which is itself a testament to Ban Gu’s influence. Fan Ye used the same four-section format: annals, tables (though fewer), treatises, and biographies. He followed Ban Gu’s evaluative summary style. He adopted the same approach to foreign relations, with chapters on the Xiongnu and Western Regions.

The complementary nature of these two works is not accidental. Ban Gu’s structural choices in the Hanshu created a template that Fan Ye could follow for the Eastern Han. The result is a unified historical coverage of the entire Han dynasty, split across two works that share the same format and philosophy.

What This Means for Reading the Hanshu

If you are reading the Hanshu, it helps to keep this structural logic in mind. The work is not trying to tell the whole Han story. It is telling the Western Han story, and it is doing so in a way that argues for the completeness and legitimacy of that period. The structure of the Hanshu reflects this purpose: every section is oriented around the Western Han as a self-contained political entity.

When you reach the end of the Hanshu and Wang Mang’s usurpation, you are not at the end of the Han dynasty. You are at the end of a chapter. The story continues in the Hou Hanshu, but Ban Gu chose not to tell that part. His choice gave the Hanshu its focused power. It also created a gap that another historian had to fill.

For the broader context of how the Hanshu fits into the Chinese historical tradition, the complete guide to the Book of Han provides the overview. And if you want to see how the Zizhi Tongjian later handled the same period, you will find that Sima Guang integrated both halves of the Han into a single continuous narrative, solving the two-Hans problem in a completely different way.

Geography and the Two-Capital Structure

The geographic distinction between Western and Eastern Han was not merely a matter of where the emperor sat. Chang’an and Luoyang represented different political economies, different military strategies, and different relationships to the empire’s frontiers. Ban Gu was acutely aware of this, and the Hanshu reflects the Western Han’s geographic orientation throughout.

Chang’an, in the Wei River valley, was a defensible position. Mountains and passes protected it, and the fertile Guanzhong plain supplied its population. This geography encouraged the Western Han’s military expansionism: the capital was oriented toward the northwest, toward the Xiongnu frontier and the Hexi Corridor that led to the Western Regions.

Luoyang, by contrast, sat on the Central Plain. It was more accessible, more connected to the agricultural heartland of the Yellow River basin, and less defensible. The Eastern Han’s orientation was more inward, more focused on domestic administration and trade than on frontier military campaigns. The treatises in the Hanshu reflect the Western Han’s outward-looking perspective, with detailed chapters on geography, rivers, and the Western Regions.

Understanding this geographic dimension helps you read the Hanshu more perceptively. When Ban Gu spends pages describing the commanderies of the northwest or the routes to the Western Regions, he is not just cataloging. He is preserving the geographic knowledge of a capital-oriented empire that looked westward, knowledge that would become less central when the Han moved east.

Frequently Asked Questions

Does the Hanshu cover the Eastern Han?

No. The Hanshu covers only the Western Han (202 BCE to 9 CE). The Eastern Han (25 to 220 CE) is covered by the Book of the Later Han (Hou Hanshu) by Fan Ye. Together they cover the entire Han dynasty.

Why did Ban Gu not cover both halves of the Han dynasty?

Ban Gu lived during the Eastern Han and served its court. Writing about a dynasty that was still in power was politically dangerous and methodologically problematic, since he could not evaluate living emperors. He chose to treat the Western Han as a completed historical period with a clear beginning and end.

How does the Hanshu handle Wang Mang’s usurpation?

Ban Gu includes Wang Mang in the narrative but structurally marginalizes him. Wang Mang’s Xin dynasty is treated as an illegitimate interregnum rather than a legitimate succession. This framing supports the Eastern Han’s claim that its rule was a restoration of legitimate Han governance.

Is the Book of the Later Han structured like the Hanshu?

Yes. Fan Ye deliberately followed Ban Gu’s structural template: annals, tables, treatises, and biographies. This makes the two works a matched pair that can be read together as a unified history of the Han dynasty.

What is the relationship between the Hanshu and the Shiji?

The Shiji covers a much broader period, from legendary antiquity through the early Han. The Hanshu narrows the focus to the Western Han. Ban Gu inherited Sima Qian’s four-section format and adapted it for a single dynasty, creating a model that all subsequent dynastic histories would follow.