Guiguzi asked questions, and Sun Bin answered first. Why is Pang Juan the winner?

Speaking of guiguzi, it is almost a household name. He has four disciples, namely Sun Bin, Pang Juan, Su Qin and Zhang Yi. But there are few records in the official history. On the contrary, there are many stories about Guiguzi in folk unofficial history, with 500 elite apprentices all over the Warring States. To some extent, Guiguzi wrote the history of the Warring States alone.

One day, Guiguzi summoned Sun Bin and Pang Juan and said to his two proud disciples: You have been in Guiguzi for five years, and you have good military accomplishments, so you can be your own masters. Now the warlords are in the most fierce melee, and you all need talents. It's time for you to graduate and go down the mountain. Sun Bin and Pang Juan were very excited after hearing this. After years of hard work, they can finally show their strength.

But Guiguzi went on to say that there is a rule that only one person is allowed to go down the mountain every year. I will work out a math problem, and whoever answers it first will graduate. Hearing this, the two of them couldn't help but get nervous. Guiguzi said: In the battle with Qin Jun, Wei Jun suffered heavy losses. When the army was reorganized, the commander brought four new recruits. In the face of seven veterans who once stood in a row, how many ways will there be to put four recruits in the queue?

Guiguzi said again, it's late now, give me an answer tomorrow morning, and then turn around and leave. Two people bowed their heads and meditated, sometimes fiddling with the stones on the ground. Soon, Sun Bin had the answer. Although Pang Juan is a little worse than Sun Bin, there is still time for this topic, so it is no problem to work out the answer. But Pang Juan was a little worried, so he made a plan to find Sun Bin. He said, whatever the outcome, we will be separated tomorrow, so let's get together tonight.

They have been together for several years and have deep feelings for each other. Sun Bin also moved the scene and agreed. To Sun Bin's surprise, Pang Juan cheated in the wine, and Sun Bin was not only drunk, but also accidentally told the answer. The next morning, although Bin Sun woke up, Pang Juan was prepared and gave the answer to the teacher in advance. Guiguzi saw the answer and allowed Pang Juanxian to go down the mountain. Sun Bin will have to wait until next year.

This is why Pang Juan went to Wei first. In just one year, Pang Juan was made a general by Wei Huiwang. Pang Juan knew that his brother Sun Bin would go down the mountain sooner or later, and he was very concerned about his talent. He made a plan and wrote to Sun Bin to come to Wei. After being persecuted by Pang Juan, he lost his legs. From then on, the two became enemies of life and death.

References: Warring States Policy