The rescue of Zhao by besieging Wei was a story that happened in the Warring States Period, and the rescue of Zhao by besieging Wei was only a small part of the battle of Guilin. The cause of the Battle of Guiling was that Wei Huiwang wanted to avenge the loss of Zhongshan. Sun Yat-sen was a small country. At first, Sun Quan surrendered to Wei, but later, after Wang Wei's death, Zhao took the opportunity to annex Sun Quan, which made King Huiwen very hostile to Zhao. However, Pang Juan proposed that Sun Quan was only a tiny place. At this time, attacking Zhao Handan could not only destroy Zhao, but also avenge Sun Quan. This is a kill two birds with one stone strategy, so Wang Wei approved Pang Juan's idea.

In 354 BC, Pang Juan led the Wei army to attack Handan, the capital of Zhao. Zhao's situation is in jeopardy at this time. The battle between Wei and Zhao was also to defeat and annex Zhao in one fell swoop, so that Wei could go out and compete for the world. Zhao was very weak at this time, so he turned to Qi, a powerful country in the East, for help. After learning the news of Zhao's help, Qi took Tian Ji as the main commander and Sun Bin as the strategist, and led 80,000 troops to save Zhao.

At that time, most people thought it was natural to go directly to Zhao and fight Wei. At that time, Tian Ji, the head coach of Qi State, felt the same way. However, Sun Bin came up with an unprecedented method, that is, attacking the capital of Zhao, to help relieve the pressure of Zhao and attract Wei Jun to return to his own capital. Later, Pang Juan was forced to move troops back to Korea.

In fact, Pang Juan didn't want to withdraw at first, because Zhao was doomed as long as he persisted for a few more days. But Wang Wei was afraid. He issued dozens of orders, asking Pang Juan to transfer troops back to the DPRK. Under Sun Bin's strategy of besieging Wei to save Zhao, Pang Juan finally had to retreat. On the way home, Pang Juan was ambushed by Sun Bin in Guiling, and Wei Jun couldn't keep up with the physical strength because of the long journey, so he was in flight under the onslaught of the Qi army.