The value of Saudi currency and RMB is determined by the relationship between supply and demand in the foreign exchange market. Exchange rate is a currency exchange rate, indicating the number of units that one currency can be converted into another. The fluctuation of exchange rate is influenced by many factors, including national economic strength, trade situation and interest rate policy. As one of the major currencies in the world, RMB has an important international status and a stable economic foundation, so it usually has a high value in the foreign exchange market. Saudi riyal is the official currency of Saudi Arabia, and its value is related to Saudi economic development. The relationship between supply and demand in the foreign exchange market will constantly change, leading to exchange rate fluctuations, so the value of Saudi currency and RMB will change relatively.