The first type of foreign exchange players: banking giants. As the spot foreign exchange market is a decentralized trading market, it is the most powerful super bank in the world that determines the exchange rate. Based on the supply and demand of money, it is usually these super banking giants who set the bid-ask spread of money. These banking giants are collectively called the inter-bank foreign exchange market, and the amount of foreign exchange traded every day is amazing. They trade foreign exchange for customers and participate in the transaction themselves. The most famous banking giants in the foreign exchange market are Barclays, UBS, Deutsche Bank, Citigroup, Goldman Sachs, Morgan, HSBC, Standard Chartered and Bank of China. The second type of foreign exchange players: commercial companies. The purpose of the company's participation in the foreign exchange market is to carry out business. For example, if Apple purchases electronic components from Japan, it must first change US dollars into Japanese yen. The foreign exchange transaction volume of these companies is much smaller than that of banks, so commercial companies usually conduct foreign exchange transactions with commercial banks. The third type of foreign exchange participants: governments or central banks, such as People's Bank of China (PBOC), European Central Bank (CEB), Bank of England (BOE), Federal Reserve (theFed) and Bank of Japan (BOJ), often participate in foreign exchange transactions. The fourth category of foreign exchange players: foreign exchange speculators. Speculative foreign exchange transactions account for nearly 90% of the total foreign exchange transactions, and foreign exchange speculators include various institutions and individuals. There is only one goal for them to participate in foreign exchange trading, that is, to make a difference (make money). Everyone who has mastered the basic knowledge of foreign exchange, certain investment skills and necessary psychological quality can become a member of the foreign exchange investor team.