In fact, there is a good difference between investing in the inner disk and investing in the outer disk. Domestic trading disk is called inner disk, and foreign trading disk is called outer disk. Like stocks and futures, there are internal and external markets. For example, the internal market of stocks refers to two domestic trading markets: Hong Kong stock market and Shenzhen stock market, while the external market refers to the foreign trading market represented by US stocks. Similarly, futures can also be divided into domestic futures and foreign futures. But at present, there is no internal and external market for foreign exchange transactions. Because China has not opened the foreign exchange market, there is no internal foreign exchange market in China, and all foreign exchange transactions belong to the external market. Traders in Chinese mainland always choose foreign exchange dealers to open accounts, such as Fuhui and Jiasheng. These top international foreign exchange dealers generally have agents in China. At present, domestic foreign exchange investment is mainly foreign exchange trading, because it is very convenient to open an account in China at present, and there is no good investment channel for stock futures, mainly domestic investment.