There are two possibilities for foreign investment. One is complete foreign investment. At this time, the total investment can be divided into two parts, one is to buy foreign products and services, the other is to buy China products and services, which will not affect foreign exchange reserves, and the other will increase foreign exchange reserves. Another possibility is partial foreign investment, which means that foreign investment only accounts for a part of the project, and the rest is made up by domestic bank loans. At this time, if the funds for purchasing foreign products and services exceed the total capital of foreign investment, it is equivalent to increasing imports and thus reducing foreign exchange reserves.