Why can't a country print money from other countries?

Brother, let me give you an example. Why don't you invent something? Will you let other companies do it? Must be to apply for a patent. If others want to do it again, you can only do it with your consent. The same is true in China, but it is larger and more complicated. Our country is also very cautious about printing money. This can be printed according to many things, and many released old ones have been destroyed. If you print it casually, the currency will swell.