When the Zen master said that Tang Xuanzong was complacent, indulged in pleasure, did not ask about state affairs, was pro-villain, and excluded talents, he looked up to the sky and sighed, looked at Zhang Cambodia who was listening in front of him, and after being silent for a while, he said: At this time, the eunuchs are also gradually rising, and Gao Lishi's power is hot. Militarily, due to the collapse of the government military system due to the years of war in the Tang Dynasty, the source of soldiers was gradually changed to a recruitment system, and the forbidden army was further expanded. In order to facilitate the control of the vast frontier, Xuanzong of the Tang Dynasty set up nine jiedu envoys and one Jingluo envoy in 722.

The Jiedu envoy was not only responsible for the military, but also took into account the local civil affairs and finances, and over time formed a situation where the Jiedu made the tail too big, and it also became the remote cause of the division of the feudal town.

Externally, Tang Xuanzong was very happy with his achievements, and for this reason, the border generals often provoked foreign wars to invite military exploits. At that time, the Tang Dynasty was competing with Tubo and Black-clothed Food for power in the Western Regions and Central Asia. The Tang general Gao Xianzhi was defeated by the Abbasid Dynasty and the Shi State alliance and lost his position in Central Asia, and then because of the Anshi Rebellion that broke out in Middle-earth, the Tang Dynasty had no intention of restoring his position.

The power of the Jiedu envoy was very great, and when there was a conflict with the central government, there was a good chance of rebellion. At that time, An Lushan, who was also the envoy of Fanyang, Pinglu and Hedong towns, had the best chance, and he was favored by Tang Xuanzong and intrigued with Prime Minister Yang Guozhong. In November 755, An Lushan launched a rebellion on the grounds of crusading against Yang Guozhong, known as the Anshi Rebellion.

Yang Guozhong and Feng Changqing thought that the enemy army was not enough and worried, and ordered Guo Ziyi to send troops from Shuofang to Hebei, and Gao Xianzhiti's army to go out of Tongguan to fight in Guandong. In December, both generals were defeated, the eastern capital Luoyang fell, and the Tang army retreated to Tongguan. Feng Gao and the others were killed by slander, and Ge Shuhan was replaced by Ge Shuhan to defend Tongguan. Yan Gaoqing, the Taishou of Changshan who raised troops in Hebei, was also defeated by the rebel general Shi Siming in the first month of the following year, and all the areas around the Kwantung region fell.

However, Guo Ziyi and Li Guangbi of Hedong marched into Hebei, joined Hengzhou, and defeated the rebel general Shi Siming, and the rebel army was in turmoil. However, Tang Xuanzong and Yang Guozhong were anxious to quell the rebellion and forced Ge Shuhan to send troops. In June, Ge Shuhan's general 80,000 soldiers and the thief general Cui Qianyou fought in Lingbao Xiyuan, and the official army was defeated. Ge Shuhan retreated to Tongguan, for his tent to pull out Guiren to the left and right dozens of cavalry to surrender thieves, the gate was not guarded, the Beijing division was shocked, Tang Xuanzong urgently fled south to Shu CD, on the way there was a change in Ma Weiyi, Yang Guozhong and Yang Guifei were killed at the request of angry soldiers. And the crown prince Li Heng was ordered by Tang Xuanzong to go to the northwest Lingwu to recruit troops. After An Lushan occupied Chang'an, he built a Yanyan. In July, after Li Heng arrived in Lingwu, he was proclaimed emperor under the support of the eunuch Li Fuguo, that is, Tang Suzong, and enshrined Tang Xuanzong as the emperor.

Tang Suzong ordered his son Li Jiao to lead the generals, assisted by Li Mi, and sent his servant Gu Huaien to send an envoy back to invite troops. At that time, the Tang general Fang Xuan's counterattack on Chang'an failed, and the situation was critical for a while.

In 757, the rebels fought among themselves, An Qingxu, the son of An Lushan, killed his father and seized the throne, and Shi Siming returned to Fanyang and mastered the military strength of Hebei. Guo Ziyi and Li Guangbi then led their troops back to Lingwu and joined forces to recover Chang'an at the end of the year. However, the rebels conquered the Jianghuai town of Suiyang as early as October, and Zhang Xun and Xu Yuan were killed in battle. Fortunately, Guo Ziyi then captured Luoyang and contained the rebels.

Soon, An Qingxu retreated to Yecheng and sought to get rid of Shi Siming. Shi Siming surrendered to the Tang Dynasty after learning about it, and the rebel forces were only left in the area of Yecheng, and in 758 Guo Ziyi, Li Guangbi and other Jiujiedu envoys besieged Yecheng. However, the Tang court's desire to eliminate Shi Siming was leaked, and Shi Siming led the rebels south to defeat the Tang army in March of the following year. Guo Ziyi was slandered by Yu Chaoen and returned to Chang'an; Shi Siming killed An Qingxu, annexed his subordinates, proclaimed himself emperor, and took Fanyang as his capital; Li Guangbi retreated as the rebels conquered Luoyang, and the situation took a turn for the worse. In 761, Li Guangbi's counterattack on Luoyang failed, and Shi Siming was actually killed by his son Shi Chaoyi after winning the victory, and the rebels fell apart.

In 762, Emperor Taishang and Tang Suzong died one after another, and the crown prince Li Yu succeeded to the throne, that is, Tang Dynasty Zong. The Tang Dynasty sect sent his son Li Shi to lead the generals, and the servant Gu Huaien was the deputy, leading the Tang army and the Hui army to conquer Luoyang. Shi Chaoyi went north to Fanyang, Fugu Huaien led the army to pursue, and the Hebei rebel general Li Huaixian also surrendered to the Tang army and pursued together. In the first month of the following year, Shi Chaoyi hanged himself in stone, and the eight-year war was settled.