Something like that China's foreign exchange control means that foreign exchange can only be held by the state, and enterprises and individuals must go through the state, not directly to the international foreign exchange market. If you want to do business with foreign countries, you should discuss with your partners how to set the price in US dollars and RMB, and when to settle the account, so you will face the risk of exchange rate, which is beneficial to both sides. Either give the question directly, or the negotiation price and settlement method are different. If RMB and USD were an exchange rate when you were talking, you decided to use USD as the price, but since then, the exchange rate between USD and RMB has changed, and when you actually get it, it will be different (only RMB), because the other party pays you USD, but it will be different if USD is converted into RMB. Similarly, if you price in RMB, you may get the same RMB, but because of possible exchange rate changes, the other party will have to pay different dollars, and the other party will have to bear the exchange rate risk. Regulation means that enterprises cannot directly hold foreign exchange such as US dollars. You can choose to change your dollars into RMB through domestic banks at the right time. If you export (exchange dollars for foreign exchange) and want to import, I don't know whether you can use your foreign exchange, or you should first exchange the earned foreign exchange for RMB, and then exchange RMB for foreign exchange (depending on the other company) to buy things. There is also control, that is, you can't directly trade the earned foreign exchange in the foreign exchange market (dollars for yen, euros, etc. ), you have to do it through the platform of domestic banks. The purpose of foreign exchange control is that the state needs you to earn foreign exchange, which should be controlled by the state and used to buy foreign products and services. That's called doing big things, such as the state investing in US Treasury bonds! Buy high-tech weapons, etc. If you want to buy foreign products in person, you must sell foreign products by converting your RMB into foreign exchange through the state. RMB is not an international currency and cannot circulate freely. Now the RMB is going to the international market. For example, in Southeast Asia, RMB can be paid to each other.