First, in ancient times, the army belonged to the emperor, and it was also one of the most important tools to maintain state rule. It is necessary to dispatch troops, so such an important tiger symbol will definitely be remembered by many people. Therefore, in the history of our country, there have been cases of stealing tiger symbols, but I have never heard of imitation. The first reason is that it cannot be imitated. Due to the extremely low level of scientific and technological production in ancient times, at that time, military symbols were one of the handicrafts that could never be completed. From our current point of view, the processing of the tiger charm is very simple, and it definitely belongs to one of the works of art in the society at that time. Moreover, there are a lot of typos on the tiger pounce, so it is very complicated to make sculptures. It is quite difficult to imitate them exactly. A slight mistake will be seen as the crime of exterminating the nine clans.
Second, the second reason is not needed. This is also one of the most important reasons. In ancient times, even if there were super-high skills in making tiger charms, no one could use them. Because every army will have a different tiger symbol, just as the current account and password should correspond, each platform has a different account, so even if you know the password, you can't open it without an account. At that time, only the emperor knew which roller to use to mobilize which army, so even if the general could copy the roller, he would only mobilize his own army and would not cause too much trouble.
Third, the third reason is too restrictive. The emperor is very clever and does not allow anyone to threaten his rule. So before he gives the drum to the general, there will be an imperial decree stating who the drum is for. How many troops can be deployed, the use time, etc. So no one imitates the roller.