Individuals and corporate customers who meet the requirements for participation can buy and sell foreign exchange at their own risk. First, the foreign exchange currency can be exchanged to meet the needs of converting one's own foreign currency into another; Second, in the case of accurately grasping the trend of foreign exchange prices, we can get the spread income by buying low and selling high, or selling high and buying low; The third is to convert low-interest foreign exchange into high-interest foreign exchange holdings to obtain spread income and realize asset preservation and appreciation.