General Li Guang is from Ji Cheng County, Longxi. His ancestor was Li Xin, who was a general in the Qin Dynasty. He was the general who captured Yan Taizi Dan. His home used to be in Li Huai County, but later he moved to Ji Cheng. Li Guang's family has been learning archery for generations. In the 14th year of Emperor Wendi (BC 166), Xiongnu invaded Xiaoguan on a large scale. Li Guang, as the son of a good family, joined the army to fight the Huns. Because he was good at riding and shooting, he killed many enemies' heads, so he was appointed as the deputy commander of Hanting.

After Emperor Jingdi acceded to the throne, Li Guang was appointed as a captain in Longxi and was appointed as General Riding Lang. When the Seven Kingdoms Rebellion, Li Guang was appointed as a captain, followed Qiu Zhou Yafu to fight against the rebels in Wu Chu, and captured the enemy flag at the gates of Changyi, making great contributions. He was transferred to Shanggu County, and the Xiongnu came to fight every day. Gong Sunkun cried and said to the emperor, "Li Guang's talent, making a westward journey, depends entirely on his own skills. He has fought the enemy head-on many times, and I am afraid that he will lose this elite soldier. " So he was appointed as the chief of Shangjun County. Later, Li Guang was transferred to the border county satrap, and was transferred to Shang Jun county magistrate.

Xiongnu invaded Shang Jun on a large scale, and the emperor sent eunuchs to study military affairs with Li Guang to fight against Xiongnu. Eunuch led dozens of cavalry on horseback, met three Huns and fought with them. Three Huns turned and fired arrows, wounding the eunuch and killing almost all his cavalry. The eunuch fled back to Li Guang. Li Guang then took one hundred cavalry to pursue the Three Xiongnu. The three men walked for dozens of miles without horses. Li Guang ordered his cavalry to spread out from left to right and attack in two ways. He personally shot the three men, killed two and captured one alive. After he was tied up and mounted his horse, he saw thousands of tarquin people from a distance. When they saw Li Guang, they thought that the cavalry had lured the enemy. They were all surprised and ran to the mountain to set up their positions. Li Guang's hundreds of cavalry is also greatly frightened, want to run back to the horse to escape. Li Guang said: "We have left the army for dozens of miles. According to the present situation, as soon as our 100 cavalry runs away, the Huns will chase and shoot, and we will be killed at once. Now that we stay, the Huns must think that we are an army to lure the enemy and dare not attack us. " Li Guang ordered the cavalry: "Forward!" The cavalry marched forward and reached a place about two miles from the Xiongnu position. They stopped and ordered, "All dismount, dismount!" The cavalry said, "There are so many enemies and they are very close. What should we do if there is an emergency? " Li Guang said: "Those enemies thought we would run away, and now we all take off our saddles to show that we will not run away, which makes them more convinced that we are the soldiers who lure the enemy." So Takan finally dared not attack. A Hun general on a white horse came out to protect his soldiers. Li Guang immediately mounted his horse, ran over with a dozen cavalry, and killed the Xiongnu general riding a white horse. Then he returned to his cavalry, unloaded his saddle, and let the soldiers release their horses and lie down casually. At this time, it was dusk, and the Xiongnu army always felt strange and dared not attack. In the middle of the night, Xiongnu soldiers thought there was an ambush in the vicinity of the Han Dynasty and wanted to sneak attack at night, so Xiongnu led the troops to evacuate. The next morning, Cai Li returned to his camp The army didn't know the whereabouts of Li Guang, so they couldn't see him later. Emperor Wu acceded to the throne, when Li Guang was transferred from Shang Jun to Weiyang Wei.

Later, Li Guang was appointed as a general by Wei Yan and set out to attack the Huns at Yanmenguan. The Huns were outnumbered, defeated Li Guang's army and captured Li Guang alive. Khan heard that Li Guang was very talented at ordinary times and ordered: "Li Guang must be taken alive." Tarquin captured Li Guang. At that time, Li Guang was injured and ill, so he put Li Guang between two horses and put it in the rope net pocket. After walking more than ten miles, Li Guang pretended to be dead. He narrowed his eyes and saw a Xiongnu boy riding a good horse beside him. Li Guang suddenly jumped on the horse of Xiongnu boy, pushed the boy down, grabbed his bow, rode the horse dozens of miles south, and met his remains, so he led them into Guansai. The Huns sent hundreds of pursuers to chase after them. When Li Guang escaped, he picked up the bow of the Xiongnu teenager and shot the chasing cavalry before he escaped. So he returned to the capital of the Han Dynasty, and the court handed Li Guang over to law enforcement officers. The magistrate ruled that Li Guang suffered too many casualties and was taken alive by the enemy and should be beheaded. Li redeemed the death penalty with money and goods and dismissed everyone.

Soon, the Huns invaded, killed the western Liaoning satrap, defeated General Han (), and General Han moved to Beiping. So the son of heaven called Li Guang the right satrap of Peiping. Li Guang is stationed in Youbeiping. When the Huns heard about it, they called him "the flying general of the Han Dynasty". They hid from him for several years and dared not invade right Peiping.

Li Guang is an honest official. When he got the reward, he gave it to his subordinates. He always eats and drinks with soldiers. From birth to death, Li Guang worked as an official for more than 40 years, with a salary of 2000 stones. There is no extra property at home, and he never talks about family property. When Li Guang led his troops, he met food and water, and when he saw water, Li Guang wouldn't go near the water until the soldiers drank it completely. The soldiers haven't completely finished their meal, and Li Guang hasn't tasted a bite. Li Guang is generous and gentle to the soldiers, so the soldiers love him and are willing to use him.

Biography of General Li is a historical biography written by Sima Qian, a historian and writer of Han Dynasty, which is contained in Historical Records 109.