"Bayan" in the History of Song: A Misread Image of a Yuan Dynasty Mongol Prime Minister

Brief Introduction

When discussing the historical figure "Bayan" (巴延), it is essential to first clarify a common historiographical misconception: *Bayan is not the figure recorded in the Xu Zizhi Tongjian (Continuation of the Comprehensive Mirror for Aid in Governance). While the Xu Zizhi Tongjian* primarily covers the history of the Song, Jin, Yuan, and Ming dynasties, its editorial style and source materials exhibit significant chronological discrepancies and identity confusion regarding the specific description: "He was the Left Prime Minister of the Mongols, of impressive appearance, and when discussing state affairs, his influence consistently surpassed that of other court officials."

In reality, "Bayan" (Bayan, 1309–1375) was an important political figure in the late Yuan Dynasty. Born into the prestigious Mongol clan of the Qoqorchi (正青白那兀律氏), he served as the Left Prime Minister. Bayan was physically imposing ("impressive appearance") and repeatedly presided over the court during the political turmoil at the end of the Yuan Dynasty. He attempted to reform corrupt policies but was eventually dismissed from his position due to his opposition to powerful ministers and the Emperor. His life is primarily recorded in the "Biography of Bayan" in the Yuan Shi (History of Yuan), rather than being directly derived from detailed core narratives of the Song or early Yuan periods in the Xu Zizhi Tongjian.

The description "his influence in state affairs consistently surpassed other court officials" more closely resembles a generalized impression of Phags-pa (八思巴) or the key strategists within the early Mongol Khanate's "Keshig" (怯薛) system, or perhaps a literary interpretation of the Yuan political structure by later generations, rather than a precise historical citation regarding Bayan himself.

Core Knowledge Points

1. Bayan's True Identity and Contributions

* Renowned Late-Yuan Prime Minister: Bayan served as a high-ranking official during the reigns of the Shun Emperor and the Huizong Emperor of the Yuan Dynasty, reaching the position of Left Prime Minister. He was of noble Mongol descent and was highly trusted by the descendants of Kublai.
* Advocacy for Reform: Faced with widespread popular uprisings and fiscal collapse in the late Yuan period, Bayan advocated for "relieving the people's burden" and "reducing corvée labor" in an attempt to alleviate class contradictions. He supported paper currency reform to stabilize the economy.
Historical Basis for "Impressive Appearance": The Yuan Shi* explicitly records that he had an "impressive appearance" (tall and robust), which aligned with the Yuan Dynasty's emphasis on physical stature for Mongol noble leaders and symbolized his prestige among court officials.

2. The Yuan Prime Minister System and "Surpassing Other Court Officials"

* Structure of Prime Ministerial Power: The Yuan Dynasty established the offices of Left and Right Prime Ministers, with the Left Prime Minister generally holding a higher status. The phrase "consistently surpassing other court officials" does not refer to physical standing order but is a metaphor for his enormous political influence. He often dominated court deliberations and could even influence the emperor's decision-making.
Deliberating on State Affairs: Bayan repeatedly convened court officials to discuss state matters in the late Yuan period. He was one of the few high-ranking Mongol officials who dared to speak frankly in remonstrance. This fundamentally differed from the Song Dynasty model of "prime ministers deliberating with the emperor" found in the Xu Zizhi Tongjian*; the Yuan system was characterized by "the emperor governing jointly with the nobility."

3. Clarification of Association with the Xu Zizhi Tongjian

Scope of the Xu Zizhi Tongjian: Compiled by Bi Yuan of the Qing Dynasty, this work primarily supplements historical events from the Song to the Yuan dynasties. However, its core source materials are official dynastic histories such as the Song Shi, Yuan Shi, and Ming Shi*.
Lack of Direct Records: The Xu Zizhi Tongjian does not contain specific chapters detailing the original text "Bayan was of impressive appearance, and when discussing state affairs, his influence consistently surpassed other court officials." This description is more likely a summative, literary interpretation of the "Biography of Bayan" in the Yuan Shi by later generations, or the result of confusing Bayan with early Yuan figures such as Phags-pa (State Preceptor) or Mubali* (木华黎).
Source of Misreading: Many online resources and non-professional articles erroneously graft descriptions of Yuan Dynasty figures onto the Xu Zizhi Tongjian*'s narratives of the Song-Yuan transition period, leading to the misunderstanding that "Bayan was the Left Prime Minister at the end of the Song / beginning of the Yuan Dynasty."

Conclusion

"Bayan" was the Left Prime Minister of the late Yuan Dynasty, not a Song Dynasty figure directly described in the Xu Zizhi Tongjian. His "impressive appearance" and role in "state affairs" reflect the efforts of the Mongol nobility to salvage the empire's crumbling situation during its final decades. To accurately understand Bayan, one must return to the original records in the Yuan Shi rather than the Xu Zizhi Tongjian, thereby avoiding chronological misplacements in historical interpretation.