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| Emperor Suzong | |
|---|---|
| Name | Li Heng (Emperor Suzong) |
| Born | 711 |
| Died | 762 |
| Reign | 756–762 |
| Temple name | Suzong |
| Predecessor | Emperor Xuanzong of Tang |
| Successor | Emperor Daizong of Tang |
| Dynasty | Tang dynasty |
| Father | Li Longji |
| Mother | Empress Wang |
Emperor Suzong Li Heng, posthumously known by the temple name Suzong, was the seventh sovereign of the Tang dynasty, ruling from 756 to 762. His reign was dominated by the crisis of the An Lushan Rebellion, efforts to restore Tang authority, and the political aftermath involving figures such as An Lushan, Gao Xianzhi, Yang Guozhong, Li Linfu, and An Qingxu. Suzong's tenure involved complex interactions with regional powers including the Uyghur Khaganate, the Tibetan Empire, and military governors like Guo Ziyi and Li Guangbi.
Li Heng was born into the imperial house of the Li family (Tang dynasty), son of Emperor Xuanzong and Empress Wang. He held princely titles and served in the capital Chang'an and the secondary capital Luoyang, intersecting with court factions led by Zhang Jiuling, Yao Chong, Song Jing, Li Bai, and Du Fu. His rise was shaped by the factional competition between chancellors Yang Guozhong and Li Linfu, and by the political fallout from military operations against the Tibetan Empire and An Lushan's frontier command in Fanyang. The outbreak of the An Lushan Rebellion forced a rapid transfer of power when Emperor Xuanzong of Tang fled Hua Prefecture toward Chengdu and Li Heng declared himself emperor at Lingwu with the support of generals such as Guo Ziyi, Gai Jiayun, and the frontier elites of Hexi.
Suzong's court attempted to reassert Tang dynasty sovereignty while balancing influential ministers including Feng Changqing, Li Bi, Li Tan, and later chancellors Li Lin, Lu Qi, and Chen Xilie. Administrative control relied heavily on regional military governors like An Sishun, Li Zhengji, Xue Song, and Tutu Chengcui, and on bureaucratic officials drawn from the Imperial examination-educated elite such as Chen Yixing and Liu Zongyuan. Fiscal pressures led to reliance on revenue sources from Guangzhou, Jiangsu, Jiangxi, and the agrarian bases in Henan and Shaanxi, while the court navigated strained relations with aristocratic houses like the Zheng family, Cui clan of Boling, and Li clan of Fanyang.
Suzong's reign was defined by the suppression of the An Lushan Rebellion, waged against rebel leaders An Lushan, An Qingxu, and later Shi Siming, with key military commanders including Guo Ziyi, Li Guangbi, Pugu Huai'en, Ning Guang, and former Tang general Xue Ne. Campaigns involved major engagements at Luoyang, Chang'an, Suiyang, and Tianjing (Nanjing), as well as sieges such as the prolonged resistance at Suiyang under Huangfu Shigong and Zhang Xun. Suzong solicited aid from the Uyghur Khaganate, resulting in Uyghur cavalry interventions commanded by Külüg Bilge Qaghan and allied with Tang forces at Luoyang and in the recapture of Chang'an. He contended with concurrent threats from the Tibetan Empire in the western Hexi Corridor and the maritime frontier threats near Guangling. Military reliance on regional jiedushi like Li Huaixian and Zhu Ci created semi-autonomous warlords that reshaped post-rebellion political geography.
Facing devastation from rebellion, Suzong's administration, with advisors such as Wang Wei, Li Shangyin, Yuan Zai, and chancellors Li Kui and Lu Qi, enacted emergency fiscal measures, wartime conscription adjustments, and tax relief in affected prefectures like Hedong, Henan, and Jizhou. Land recovery and resettlement programs targeted depopulated commanderies including Yanmen and Hejian; agricultural rehabilitation drew on irrigation and granary policies influenced by officials connected to Sima Guang's later historiographical tradition. Court politics saw purges and promotions involving Yang Guozhong's downfall, intrigues with eunuchs such as Li Fuguo and Yu Chao'en, and factional disputes that implicated cultural figures like Bai Juyi and Han Yu. The emperor confronted challenges in restoring the Imperial examinations and reconstituting the Censorate and Six Ministries.
Suzong's diplomacy navigated alliances and rivalries with steppe and highland polities: he negotiated military assistance and tribute arrangements with the Uyghur Khaganate, contested the Tibetan Empire over the Gansu corridors, and monitored interactions with the Silla kingdom and the Arab Abbasid Caliphate through indirect trade routes reaching Guangzhou and Changsha. Envoys such as Li Han and emissaries from Annan Protectorate engaged in negotiations over frontier stability. Diplomatic contacts involved marriage alliances, military subsidies, and trade in goods passing through Silk Road nodes like Dunhuang and Hotan.
Emperor Suzong died in 762 amid continuing stress from military and court factions, with his demise followed by the accession of his son Emperor Daizong. The succession process involved powerful eunuchs including Li Fuguo and influential generals such as Guo Ziyi, and set the stage for the later consolidation of power by regional jiedushi like An Lushan's successors and Li Zhengji. Posthumous rituals were conducted at the imperial ancestral temple in Chang'an in accordance with rites overseen by officials like Sima Zhi and clerks from the Ministry of Rites.
Historians assess Suzong's reign as pivotal in transitioning the Tang dynasty from centralized dominance to a polity dominated by military governors and eunuch influence, with long-term effects on the Five Dynasties and Ten Kingdoms period antecedents and the fragmentation of Tang authority noted by later scholars such as Sima Qian's tradition and Ouyang Xiu's historiography. His reliance on external allies like the Uyghurs and empowerment of jiedushi including Guo Ziyi and Li Guangbi are debated in works by Edward Schafer and Denis Twitchett's modern scholarship. Suzong's era shaped Tang cultural memory remembered in poetry by Du Fu, administrative chronicles compiled by Liu Xu, and the evolving role of the imperial court in subsequent dynastic studies.