1, China is a big exporter, and a large part of China's foreign exchange reserves are earned by exports;

2. The risk of buying American enterprises is much greater than that of buying US Treasury bonds, and the American high-tech companies we need are often not sold to China for various reasons.

Foreign exchange reserves, also known as foreign exchange reserves, refer to foreign exchange assets held by central banks and other government agencies to meet the needs of international payment.

The specific forms of foreign exchange reserves include: short-term government deposits abroad or other means of payment that can be cashed abroad, such as foreign securities, checks, promissory notes, foreign currency drafts of foreign banks, etc. It is mainly used to pay off the balance of payments deficit, intervene in the foreign exchange market and maintain the exchange rate of the domestic currency.