This problem is bigger. Say it briefly; Generally speaking, China's commodities are closely related to the international market, such as import and export. It depends on the international market to some extent. Such as copper, zinc, aluminum, fuel oil, beans and grease. Less contact, relatively independent. For example, the respective weights of PTA, wheat and corn are difficult to calculate. The correlation degree is also uneven. In addition, the recent exchange rate changes will also have some impact on China futures. If we must say that our dependence on the international market, or the degree of influence, is about 70%.