Expand 1: Exchange rate, also known as foreign exchange rate, foreign exchange rate or foreign exchange market, refers to the exchange rate between two currencies and can also be regarded as the value of one country's currency against another. Specifically, it refers to the ratio or parity between one country's currency and another country's currency, or the price of another country's currency expressed in one country's currency. The exchange rate changes every day.

Query the exchange rate conversion of the day.

Extension 2: Vietnamese dong-(Vietnamese: ng, Chinese character: copper), the monetary unit of Vietnam. Use "?" Symbols indicate that. The subsidy unit is Hao and Xu, 1 guilder = 10 Hao = 100xu, which is rarely used because of its small face value. It is usually placed in the name of a country and later expressed in monetary units.