World finance is a series of information islands. When a country cannot break the information islands between itself and the outside world, it cannot issue a large amount of currency. Zimbabwe is a failed example, and the US dollar is a successful example.

People only know that the US dollar is the world currency, but how did the US dollar break various financial information islands step by step and realize the global financial integration of the US dollar?

History is always surprisingly similar, and so is the currency circle.