Introduction: This article covers the rule of Jin’s Emperors Shizong and Zhangzong, alongside Southern Song’s political shifts. After Hailing Wang’s failed invasion, Shizong stabilized the Jin with Sinicized reforms. Song’s Xiaozong honored Yue Fei and launched a northern expedition. The two empires reached a long peace, with Jin flourishing as a model of enlightened governance.
The Humiliation of Shaoxing and the Rise of Hailing Wang
Following the tragic execution of Yue Fei, the Song Dynasty under Emperor Gaozong (Zhao Gou) was forced into an even more humiliating peace with the Jin Dynasty. Beyond the annual tribute of silver and silk established in the previous Treaty of Shaoxing, Song had to cede vast territories in Henan and Shaanxi. Gaozong, swallowing his pride, submitted a memorial to Emperor Xizong of Jin (Wanyan Dan), pledging eternal vassalage. However, peace was fleeting. A few years later, Wanyan Zongbi (Wuzhu), the arch-hawk of Jin, died, but stability did not follow.
Wanyan Liang, a cousin of Emperor Xizong known historically as Hailing Wang, harbored deep resentment for not being emperor. Exploiting Xizong’s tyranny, he orchestrated a palace coup, assassinating the emperor and seizing the throne. Ambitious to rule all of China, Hailing Wang moved the capital from Shangjing (in modern Heilongjiang) to Yanjing (modern Beijing), renaming it Zhongdu. He adopted Han Chinese administrative systems and the imperial examination. Facing opposition from Jurchen nobles who resisted leaving their homeland, Hailing Wang ruthlessly demolished the old palaces in Shangjing and stripped dissenters of their titles, sowing seeds of hatred among the aristocracy.
The Battle of Caishi and the Fall of a Tyrant
In 1161, Hailing Wang tore up the peace treaty, launching a massive four-pronged invasion of the Southern Song. Confident of victory within three years, he led his forces to the north bank of the Yangtze River. In the Song court, the traitor Qin Hui was long dead, and Gaozong, terrified, considered fleeing by sea once again. However, strong opposition from his ministers forced him to send Yu Yunwen, a civilian official, to supervise the front lines.
At Caishi (near modern Dangtu), Yu Yunwen quickly organized the defenses. Hailing Wang, clad in golden armor, led over 100,000 troops in a death-defying attempt to cross the river. The Song navy, utilizing fast paddle-wheel ships, outmaneuvered the cumbersome Jin fleet. Using “thunder crash bombs” that released smoke and lime, the Song blinded and confused the Jin soldiers, forcing a disastrous retreat. Hailing Wang withdrew to Guazhou, intending to try another crossing.
Meanwhile, a coup erupted within the Jin empire. Wanyan Yong, Hailing Wang’s cousin and the governor of Dongjing (Liaoyang), was proclaimed emperor by dissatisfied generals, taking the title Emperor Shizong of Jin. Shizong declared Hailing Wang deposed and cut off his supply lines. News of the usurpation demoralized the Jin army at the front. In a final act of rebellion, Jin generals assassinated Hailing Wang in his camp, ending the invasion and bringing temporary peace.
The Ascension of Emperor Xiaozong and the Longxing Peace
The victory at Caishi revitalized the Song court. Public opinion demanded the rehabilitation of Yue Fei and a return to offensive strategies. Emperor Gaozong, embarrassed by the repeated Jin betrayals and facing internal pressure, decided to abdicate. Having lost the ability to have children due to a fright-induced illness during the earlier Jin invasions, Gaozong had adopted Zhao Wei, a seventh-generation descendant of Song Taizu (Zhao Kuangyin), as his heir. In 1162, Gaozong stepped down, and Zhao Wei ascended the throne as Emperor Xiaozong (renamed Zhao Shen), returning the imperial line to Taizu’s branch, fulfilling the ancient prophecy of the “Golden Casket Alliance.”
Unlike his predecessor, Xiaozong was a staunch advocate of resistance. Shortly after ascending, he posthumously restored Yue Fei’s titles and built the “Temple of Loyalty and Martyrdom” in Ezhou. He recalled exiled warhawks like Zhang Jun and launched the Longxing Northern Expedition in 1163. Although initially successful, the campaign eventually faltered due to poor coordination and logistical issues. Forced to negotiate, Xiaozong secured the Treaty of Longxing. While Song still paid tribute, it was no longer required to call itself a “vassal,” instead referring to the Jin emperor as “uncle” and reducing the annual payment. This brought forty years of relative peace to both nations.
The Governance of Emperor Shizong: The “Little Yao and Shun”
Emperor Shizong (Wanyan Yong), nearing forty when he took the throne, was a wise ruler deeply influenced by Han culture. Recognizing the cultural and economic gap between Jin and Song, he believed that adopting Han methods was essential for ruling the Central Plains. Despite advice to return to the old capital of Shangjing, Shizong insisted on remaining in Zhongdu (Yanjing), stating that the center of gravity and the hearts of the people lay in the south.
Shizong fiercely defended the imperial examination system against conservative Jurchen nobles who wished to abolish it, asking, “Has there ever been an emperor who did not use scholars?” except for the tyrant Qin Shi Huang. Determined to be a benevolent ruler, he implemented policies of rest and recovery similar to the Han Dynasty’s “Rule of Wen and Jing.” He discharged soldiers to return to farming, amnestied rebels, and liberated many slaves, redeeming those sold due to famine with state funds. These measures significantly boosted agricultural production and stabilized society.
To address wealth inequality caused by the Meng’an-Mouke system (a military-agricultural organization), Shizong introduced the “Tongjian Tuipai” reform. This involved a comprehensive survey of household assets – including land, houses, livestock, and trees – to categorize families into three grades for fairer taxation and corvee labor distribution. Personally, Shizong practiced extreme frugality, refusing to build new palaces and reprimanding officials who exploited the populace to provide him with delicacies like fresh mushrooms. His virtuous rule earned him the historical epithet “Little Yao and Shun.”
The Legacy of Shizong and Zhangzong
Shizong established his son as crown prince, but the prince predeceased him. Consequently, he named his grandson, Wanyan Jing, as the heir apparent. Upon Shizong’s death, Wanyan Jing ascended as Emperor Zhangzong of Jin. Highly educated and deeply versed in Han rituals, Zhangzong further sinicized the Jin state. He officially elevated Confucianism as the state ideology, built temples to Confucius, and codified laws based on Tang and Song models. Crucially, he issued decrees completely abolishing slavery and prohibiting the enslavement of commoners, marking a significant step in Jurchen social progress.
Under the reigns of Shizong and Zhangzong, the Jin Dynasty reached its zenith, flourishing in economy, literature, music, painting, and medicine. In contrast, the Southern Song, despite having a willing emperor in Xiaozong, struggled with bureaucratic inertia and factionalism, unable to fully capitalize on the era of peace to regain lost glory. The period marked a unique era where the “barbarian” Jin dynasty arguably surpassed the Han Chinese Song in internal stability and cultural synthesis.
Note
Hailing Wang (Wanyan Liang)
Tyrannical Jin emperor who invaded Southern Song and was assassinated after defeat at Caishi.
Yu Yunwen
Song civilian official who defeated the Jin navy at the Battle of Caishi using gunpowder weapons.
Emperor Gaozong (Zhao Gou)
Southern Song emperor who pursued peace with Jin and allowed Yue Fei’s murder.
Emperor Xiaozong
Reformed Song ruler who rehabilitated Yue Fei and launched the Longxing Expedition.
Emperor Shizong (Wanyan Yong)
Wise Jin emperor known as “Little Yao and Shun” for benevolent, stable rule.
Emperor Zhangzong
Shizong’s grandson who further sinicized Jin and strengthened Confucian governance.
Battle of Caishi (1161)
Song naval victory using early gunpowder bombs that stopped Jin’s Yangtze crossing.
Longxing Northern Expedition
Song campaign to recover northern lands; ended with a revised peace treaty.
Treaty of Longxing
Peace agreement that reduced Song’s tribute and ended vassal status.
Meng’an-Mouke System
Jin military-farming social structure reformed for fairer taxation.
“Little Yao and Shun”
Highest praise for a virtuous ruler, comparing Shizong to ancient sage kings.
Rule of Wen and Jing
Reference to a golden age of Han Dynasty peace and recovery.
Golden Casket Alliance
Ancient prophecy that the Song throne would return to Emperor Taizu’s lineage.
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