2. Sun Bin thought that Wei attacked Handan with elite soldiers, and the national situation was empty, so he led an army to besiege the girders of Wei capital and let Wei drive Pang Juan back to the battle. But Sun Bin ambushed in Guiling (Heze, Shandong, Changyuan, Henan), defeated Wei Jun and captured Pang Juan alive.
3. In this campaign, Sun Bin evaded reality and attacked what was left, creating the tactic of "encircling Wei to save Zhao", which has become a commonly used military means to lure the enemy into submission for more than 2,000 years.