GDP is the gross national product, which is closely related to the exchange rate. The relationship between CPI and exchange rate is the closest, because once inflation or deflation occurs, it will be directly reflected in the exchange rate. Therefore, it will raise interest rates or cut interest rates to control the gap between exchange rate and GDP, not too far! Generally speaking, when the economy is good, the exchange rate will rise, and when the economy is bad, it will lower interest rates and increase liquidity! You got it? I hope I can help you!