Chengdu in the "Zizhi Tongjian": A Historical Witness of the Land of Abundance

Brief Introduction

Chengdu, anciently known as Yizhou and Jinguan City (City of Brocade), is now the capital of Sichuan Province. As the core city of Southwest China, Chengdu boasts over 3,000 years of urban history and is renowned as the "Land of Abundance." In the "Zizhi Tongjian" (Comprehensive Mirror in Aid of Governance), a chronological universal history compiled by Sima Guang during the Northern Song Dynasty, Chengdu is not merely a geographical term but a key stage witnessing the rise and fall of dynasties and strategic contests. The book aims to "reflect on the past so as to aid the way of governance." The records of Chengdu in the book profoundly reveal its unique value as a political, economic, and military center in the Southwest, providing an important perspective for understanding ancient Chinese history.

Core Knowledge Points

* Geographical and Economic Advantages: Chengdu is located in the western part of the Sichuan Basin, with flat terrain and developed water conservancy. Thanks to water projects like Dujiangyan, the Chengdu Plain has fertile agriculture and high grain yields, making it an important granary in ancient times and providing a solid economic foundation for regimes.
* Status as a Political Center: Historically, it served as the capital of regimes multiple times, such as the Ancient Shu Kingdom, the Shu Han regime, and as a temporary imperial residence during the An Lushan Rebellion in the Tang Dynasty. Its political status often fluctuated with the strength of the central government.
* Strategic Barrier Function: Relying on natural defenses such as the Qinling and Daba Mountains, the Chengdu Plain is easy to defend but difficult to attack. In times of chaos, it often served as the headquarters for separatist regimes or a refuge for the royal family of Central Plains dynasties migrating south.

Connection with the Content of "Zizhi Tongjian"

The records of Chengdu in the "Zizhi Tongjian" are mainly concentrated in the late Han Dynasty, Three Kingdoms period, and Tang Dynasty, with specific connections as follows:

1. The Rise and Fall of the Shu Han Regime:
The book details how Liu Bei proclaimed himself emperor in Chengdu in the first year of Zhangwu (221 AD), establishing Shu Han. Zhuge Liang stationed himself in the rear here and launched multiple Northern Expeditions against Cao Wei. As the political center of Shu Han, the survival of Chengdu was directly linked to the fate of the regime. In his narration, Sima Guang highlighted the role of Chengdu as a strategic rear supporting the frontline battles.

2. The Historical Moment of Shu's Fall:
Volume 79 of the "Zizhi Tongjian" records how the Wei general Deng Ai crossed Yinping secretly and arrived at the gates of Chengdu. Facing this crisis, the last emperor, Liu Shan, chose to surrender, marking the end of the Shu Han regime. This event is one of the most famous records regarding Chengdu in the book, illustrating the historical lesson that once strategic defense fails, the capital is in imminent danger.

3. A Refuge for the Tang Imperial House:
In the section on the Tang Dynasty, the book mentions that after the outbreak of the An Lushan Rebellion, Emperor Xuanzong fled hastily to Shu, and Chengdu once again became a temporary capital. This reflects Chengdu's special status as a "second home" for Central Plains dynasties, demonstrating its buffering role during moments of national crisis.

Conclusion

Through the lens of the "Zizhi Tongjian," we can see that Chengdu is not merely a bustling metropolis but a strategic hub in the torrent of history. It carries multiple layers of historical memory in the book, from the contention of the Three Kingdoms to the refuge of the High Tang. It is an important sample that cannot be ignored in the study of ancient Chinese political geography. Understanding Chengdu's role in the book helps us better grasp the profound logic regarding geopolitics and regime survival presented in the "Zizhi Tongjian."