In 354 BC, Zhao attacked Wei and forced Wei to surrender. Wei was originally Wei, and later it was changed to Zhao. Wei Huiwang was very angry, so he decided to send Pang Juan to attack Zhao. In less than a year, Pang Juan attacked Handan, the capital of Zhao.

Handan is in danger. Zhao Chenghou, the monarch of the State of Zhao, tried his best to stick to it, and at the same time sent someone to Qi for help (at this time, Zhao had formed an alliance with Qi). Qi Weiwang appointed Tian Ji as general, Sun Bin as strategist, and led a great army to save Zhao.

Sun Bin's plan is to make the least combative soldiers in the army and Gaotang pretend to attack Wei's military stronghold, Xiangling, paralyze Wei Jun, and the army will detour straight into the girder. Sun Bin was appreciated by Qi Weiwang.