In 78 1 year, Tang Suzong was under construction. Nearly 20 years have passed since the An Shi Rebellion. The mainland of the Tang Dynasty gradually recovered its vitality, and the Uighurs, as always, sent envoys to the capital Chang 'an. There are two special envoys among the members of the delegation. They wear the official uniforms of the Tang Dynasty and speak the language of the mainland. When they met Tang Suzong, the two men.

When Tang Suzong and his courtiers heard about their origins, they were extremely surprised and sighed. It turns out that in the consciousness of the monarch and ministers in the Tang Dynasty, the western regions were not all theirs. What happened?

During the reign of Emperor Xuanzong of the Tang Dynasty, the national strength reached its peak and rapidly expanded to Central Asia. What's more, the famous Sandroos War broke out. In the vast western regions, the Tang dynasty also set up the rest capital Bao government and the northern dynasty capital Bao government to exercise jurisdiction here. However, just as Anxi Prefecture was recruiting and planning to go further, the Anshi Rebellion happened.

A large number of the most elite border soldiers in the Tang Dynasty were mobilized to suppress the rebellion. At this time, the ancient enemy of the Tang Dynasty, Tubo, took advantage of it. In 760, the military town of Hexi was captured by Tubo, and the Tang Dynasty was unable to take care of it. In 766, on the recommendation of Guo Ziyi, our time envoy of the North, his nephew and young general Zuo Wuwei was ordered to Hexi and Anxi as governor.

Guo Xin can also command several remnants of the Tang Dynasty. He is always in a state of passive defense and has very few resources. However, under the attack of Tubo, Tang Jun was unable to maintain the main roads, and finally Hexi fell, while Anxi four towns beyond the Great Wall were completely isolated from the Tang Dynasty and became an enclave, and Guo Xin was forgotten by the state.

Here, however, Guo Xin, Li Yuanzhong and others of our time insist on doing so. While maintaining local law and order, they resisted the Tubo attack. Because they cut off the connection with the Central Plains, Guo Xin didn't even know that the regime in Shanhaiguan Pass had changed, but still insisted on using Tang Daizong's calendar and issuing currency, while the soldiers waited day after day, and their hair turned white.

In the meantime, Guo Xin, only his thousands of subordinates, kept trying to send messengers to report to the Central Plains. However, due to the obstruction of Tubo, it was never successful. In a precarious situation, it was not until 78 1 that Guo Wei's troops returned to Chang 'an via Uighur.

After hearing Guo Xin's story, Tang Daizong and his ministers sighed. Soon the court appointed Guo Xin as the right servant of the proofreading minister and promoted him to our time in four towns. Soldiers in four towns were promoted to level seven according to their ranks. At this time, Guo Xin's sphere of influence still includes 57 countries in the western regions and ten surnames of Turks.

However, although the Tang Dynasty gave Guo Xin a false name, it failed to give them any practical assistance, let alone the ability to fight against Tubo and get through the blocked defense line. Guo Xin can only lead the soldiers to persevere day by day. In the long-term persistence, they gradually turned white, and Tubo also launched an offensive from time to time.

In the period of Tang Dezong (789), monk Wukong went to Ju Chi, a western region, and met Guo Xin, the king of Wuwei County in Ju Chi, indicating that the four towns of Ju Chi were still controlled by Tang Jun at this time, but in Tang Xianzong, Anxi finally fell out of power. Historians don't know when it fell, but history remembers Guo Xin and this group of Tang Jun. He was forgotten by the country and didn't even know the change of regime.