In September 765, after the Tang Dynasty rebelled against the imperial court, it colluded with the armies of the northwestern ethnic minorities such as Huilu, Tubo, Tuguhun and Dangxiang, totaling more than 300,000 people to attack the Tang Dynasty, and the capital Chang'an (now Xi'an, Shaanxi Province) was once again seriously threatened.
The general Guo Ziyi suggested that emperor Tang Dynasty emperor dispatch troops to defend Chang'an by holding Jingyang (present-day north of Xi'an).
In October, as soon as Guo Ziyi arrived in Jingyang, he was surrounded by more than 100,000 people from the Tubo and Hui coalition forces, and he was suddenly in a desperate situation. Guo Ziyi, who was nearly seventy years old, faced with a strong enemy ten times that of himself, was calm and self-assured, and did not panic at all. On the one hand, he ordered the generals to be tightly fortified and not to fight; on the other hand, he closely monitored the movements of the enemy and acted with camera.
Soon, Guo Ziyi noticed a commotion outside Jingyang City, and yao Geluo, the main general of the Hui army, led his troops from the north of the city to the west of the city. Guo Ziyi immediately sent someone to inquire about the news.
It turned out that the Tang Dynasty rebel general Gu Huai'en, who had provoked Tubo and Hui to send troops, had died of a violent illness in Mingsha (now Zhongweidong, Ningxia) in September, and Tubo wanted to take the opportunity to rule the Hui people and horses. However, the Hui lord Yao Geluo was afraid of being annexed by the Tubo army, so there was this kind of military action to change defenses.
Guo Ziyi thought to himself: In the battle to quell the "Anshi Rebellion" and recover the two capitals, he had fought side by side with the Hui army, and he had a high prestige among the Hui generals, and it was possible to retreat or even win a counterattack from the Hui army. Therefore, he immediately sent his pro-army general Li Guangzhen to test it.
After Li Guangzhen left the city, he came to the tent of Yao Geluo, the chief general of the Hui army in the west of the city, and said: "My Tang Commander General Guo Ziyi greeted you. ”
Yao Ge Luo was shocked and asked busily, "Are you talking about Guo Linggong?" Is he still alive? You're not deceiving me, are you? ”
"What are you doing lying to?" Of course, Guo Linggong is still there! Li Guangzhan replied without question.
"But the servant Gu Huai'en had already told us that Guo Linggong was dead." If Guo Linggong is indeed here, can you invite him to meet me? ”
Li Guangzhan relayed what Yao Geluo said to Guo Ziyi, who thought for a moment and decided to go to see Yao Geluo alone.
The generals are very worried, thinking that the manager should not move lightly, and cannot risk his life.
Guo Ziyi said: "The more people there are, the worse it is, and it is most appropriate for me to go alone." You don't have to worry about it so much, I have my own measure in this matter. ”
In the end, Guo Ziyi tried to defy the public opinion, came alone to the outside of the Huiyi military camp, and removed his armor in front of the Hui hui soldiers, lowered his weapons, and dismounted on foot.
Yao Geluo got the soldier's report, heard that Guo Ziyi was indeed still there, and that the septuagenarian veteran had actually come to see himself single-handedly and lightly, and finally put his mind at ease. At his command, the Hui officers and men quickly put away the arrows.
When Guo Ziyi reached the front of the Hui army, Yao Geluo and his big and small leaders fell to their knees together. Guo Ziyi rolled over and dismounted, personally picked up Yao Geluo, and signaled the leaders to get up.
Yao Geluo welcomed Guo Ziyi to the shogunate. After the greeting, Guo Ziyi shook Yao Geluo's hand and said, "The Hui army has made great contributions to the Tang Dynasty, and the imperial court has treated you very well, so why did you violate the Old Testament and send a large army to attack the Tang Dynasty?" ”
"This..." Yao GeLuo said for a moment.
Guo Ziyi added, "People like GuGu Huai'en who betrayed the imperial court and abandoned their mothers will not be tolerated in your returns. It is unwise for you to follow him, abandon your previous achievements and forge a new grudge, and turn your back on Lord Tang and help the rebels. I came here today to explain this to you, you can kill me, but the Tang Dynasty will not let you go. ”
Yao Ge Luo saw that Guo Ziyi was speaking sincerely, and the needle was hidden in the cotton, and said busily: "Please order the public to forgive the sin, we are on the servant Gu Huai'en." The servant Gu Huai'en said that the Heavenly Khan had died, Ling Gong had also died, and we had only just raised troops, so how could we make enemies with General Guo again! ”
Guo Ziyi saw that Yao Ge Luo had changed his mind and took the opportunity to say: "Tubo treacherous, why don't you strike back?" If this is the case, you can not only obtain the treasures of Tubo, but also continue your friendship with the Tang Dynasty, the best of both worlds, why not? ”
Yao Geluo said: "We are willing to obey Guo Linggong's orders, and we are willing to attack Tubo for Guo Linggong and atone for our sins." ”
In this way, the negotiations were successful. Faced with a desperate situation, Guo Ziyi did not hesitate to break into the enemy camp with his own risks and riding alone and empty-handed, and finally relied on his great wisdom and courage to turn the enemy into a friend, disintegrated the enemy alliance between Tubo and Hui, and defused a major crisis for Datang.