Sun Bing was framed by his fellow disciple Pang Juan in the State of Wei, so much so that the King of Wei suspected that he was smuggling with the State of Qi and was a traitor sent by the State of Qi, and almost put Sun Bin to death, but it is not known whether Pang Juan still cared about the friendship of his brothers, or wanted to leave Sun Zhen to let him write a letter of war and then die, Pang Juan actually saved Sun Zhen's life in front of the King of Wei. Sun Zhen was also grateful to Pang Juan for this, and later after Sun Zhi learned of Pang Juan's sinister intentions, he pretended to be crazy and fled from the Wei kingdom, perhaps Pang Juan thought that Sun Zhen was no longer afraid, so he let him go. In this way, it is equivalent to giving Sun Bin the opportunity to take revenge on him.
Sun Zhen was a good proud son of heaven, full of ambition before he could exert it, he was tortured by Pang Juan so that people did not look like ghosts like ghosts, and in the face of bitter hatred, Sun Zhen could not be generous. Subsequently, he traveled to the State of Qi, and the general of the State of Qi, Tian Ji, admired him very much, honored him as a guest of honor, and stayed in the palace as a guest. Although Tian Ji was a general, his wisdom was average, so the arrival of Sun Zhi brought a lot of benefits to Tian Ji, and Sun Zhi was simply his think tank. Later, King Qi Wei also discovered the talent of Sun Zhen and was planning to reuse him. At this time, Zhao Guo sent emissaries to ask to see King Qi Wei, and Sun Zhen knew that his opportunity was coming.
It turned out that before Zhao Guo went to bully Wei Guo, Wei Guo recognized Wei Guo as the eldest brother, so Wei Guo went to the eldest brother to cry, and the King of Wei immediately decided to send troops to Zhao Guo, and the general who led the army was Sun Zhen's mortal enemy- Pang Juan. The strength of the Zhao state also bullied and bullied the small country, and compared with the Wei state, which was known as the "strong Wei" at that time, it immediately collapsed into an army, and the capital of the Zhao state, Handan, was besieged, and the Zhao state had to ask the state of Qi for help. After receiving the emissaries of the State of Zhao, the King of Qi Wei decided to send troops to rescue the State of Zhao after much consideration.
Originally, King Qi Wei was very optimistic about Sun Bing and wanted to make him the commander, but Sun Zhi refused. On the one hand, Sun Bin felt that his legs could no longer walk, and he was not suitable to be a commander, but also because he had some inferiority in his heart, and more importantly, Tian Ji had the grace of knowing him, so he proposed to the King of Qi Wei that Tian Ji be the commander and he was a military master. Sun Bin suggested to Tian Ji that at this time, he could not directly face the main force of the Upper Wei army in Handan, otherwise the victory or defeat would be unpredictable. Sun Bing thought of a clever plan, he first let other armies attack Xiangling, and then returned to Xiangling after Pang Juan had broken handan, and at this time Tian Ji sent troops to ambush Pang Juan's inevitable Guiling Road, and Pang Juan was beaten to no avail because he was defenseless and had no power to fight back.
After this battle, Sun Bing became famous in one fell swoop, and the set of tactics he pioneered, "attacking and saving", was still used in the Japanese army more than two thousand years later, and the Eighth Route Army fought a beautiful ambush battle at Shentouling during the War of Resistance, which made people have to admire Sun Bing's wisdom.