Shang Yang's political reform in Qin State is a fundamental and thorough change from system to army to political affairs and people's life. The most important thing is that the Qin law is harsh and everyone is absolutely equal before the law. Although Shang Yang died, the Qin law still existed, and Shang Yang's law was implemented until Qin unified the six countries. Qin law rewards farming war, which makes people brave in public war and afraid of private war. The military system of Qin law is: beheading. This makes the door of title open to the working people, so there is a saying that everyone is equal before the title. However, this is also the fundamental reason why Chen Sheng and others shouted an eternal famous saying during the rebellion and uprising. Qin law encourages farmers to farm. Farming is to eat, eating is to kill the enemy, killing the enemy is to make military achievements, making military achievements is to get a title, and taking a title is to not farm. Two thousand years later, the United States used the same method. The same military system created two world superpowers at that time.