The reason for attracting investment is simple. Utilizing foreign capital can accelerate China's economic construction and boost GDP. However, the purchase of US Treasury bonds is not directly related to it, but another macro-strategic issue. For example, in a nutshell, there are two points:

1, the core of buying US Treasury bonds lies in foreign exchange reserves! He used it as a guarantee for the value of the RMB. Use foreign exchange as a guarantee for the value of RMB. Otherwise, the government's currency issuance will not be restricted. The main function of foreign exchange reserves is that when users of RMB feel that RMB is unsafe, they can use RMB to exchange physical property with the central bank. All the country can give you is gold bars and foreign exchange. It is precisely because the country can get these things that the RMB has credit. Therefore, these foreign exchange reserves are simply inexhaustible!

Then why can you buy American debt? Because of the good credit and high liquidity of American debt, you can still spend 100 dollars on a US debt bond. Such things can also replace monetary guarantees. So, you can buy American bonds. The reason for not buying anything else is simple. If China sells these things, the price will go up ~ ~

2. On the surface, buying U.S. Treasury bonds helps the stability of the United States, but in fact it helps itself. If you don't buy American debt all the time, once the United States collapses, the EU will be the happiest. The EU's own economic aggregate is higher than that of the United States, but it has been suppressed by the United States because it has no leader. Once the United States dies, China's GDP will only account for a fraction of the EU's, which is equivalent to crushing the United States and making the EU the boss. And at that time, China's export share to the United States was too large. Once the United States dies, all China enterprises exporting to the United States will also be affected. By then, millions of people will lose their jobs, which is a big loss-making business.

What is most relevant to your question is that the United States is China's largest commodity exporter (single country), and the balance between import and export has always been China's surplus. The best way to recover dollars is to buy government bonds. High-tech, weapons and equipment will definitely not be sold, and you are not sure about buying a house or equity. You can buy gold, oil or foreign exchange (euro, yen, Swiss franc or Australian dollar), and the market chips are limited. What you buy will go up in price. In contrast, it is better to buy national debt-national debt, behind which is the national credit of the United States. Compared with other countries, it is still better.