Why did Shang Yang die under the laws he made?

It is not an exaggeration to say that Shang Yang died in his own hands.

First of all, Shang Yang's reform seriously violated the interests of the aristocratic class, and had offended several princes at the time. Later, after Qin Xiaogong's death, it can be said that he suffered crazy revenge. This was one of the reasons why he died at the hands of his own reform.

Second point, the reason why Shang Yang's reform was able to be implemented despite so much resistance was mainly due to the strong support of Qin Xiaogong in addition to historical trends. Therefore, once Qin Xiaogong died and the reform was completed, Shang Yang would no longer be able to protect himself. After King Qin Hui came to power, Shang Yang didn't have time to find a way out for himself. After hearing the news, he could only take his mother and run away.

The third point is both helpless and ironic for Shang Yang. After he fled, the inn was closed and neighboring countries were not allowed to enter. The reason is that there was a reform law at that time. If the inn took in people without documents, they would be guilty of consecutive imprisonment. Moreover, Shang Yang had offended the state of Wei, so he had no choice but to escape back. Later, he was torn apart by a car and died.

Although Shang Yang died, the Qin State took the lead in becoming stronger because of the earliest reform, laying the foundation for subsequent unification.