SudangHelp is a Korean financial decision engine that turns scattered government policies and financial data into simple calculator outputs. The product direction is intentionally practical: users should be able to open a page, enter a number, and get a clear result without reading through multiple policy documents. One of the more interesting tools in this system is the travel exchange calculator . At first, it sounds like a basic currency converter, but the real use case is a little different: travelers need fast answers, country-specific defaults, and a page that still behaves reasonably when the network is unstable. People do not always need a full finance dashboard when they are traveling. They need to know things like: "How much is 100,000 VND in KRW?" "Can I use this in the airport without installing an app?" "Can I open the same page again if the connection is bad?" "Can the page start with the right currency for Vietnam, Thailand, or Japan?" That changed the implementation direction.…