Of course, the change of the banknote's image or the exchange of damaged banknotes is strictly controlled. However, there are countries that do not worry too much about the amount of money they print - of course I am thinking about the USA. Unfortunately, but the US dollar is the guiding currency of the world and if the US prints dollars, the rest of the world must also print money to be able to match the level. And this is the bubble we should be afraid of.
Unless the Chinese government will make its own country self sufficient and not export-oriented, then they can say "check". But this will make the infamous Black Thursday a child game.