进入90年代以来,世界贸易呈现出一片繁荣景象,贸易额的增长速度远高于经济的增长速度,世界各国都致力于推进自由贸易。但在执行过程中,出于本国的切身利益,各国又想尽办法采取各种关税或非关税壁垒来保护本国市场,限制外国产品的输入。我国自改革开放以来,对外贸 Since entering the 1990s, world trade has shown a prosperous phenomenon. The growth rate of trade volume is much higher than the economic growth rate. Countries around the world are committed to advancing free trade. However, in the process of implementation, due to the vital interests of the country, countries have tried their best to adopt various tariffs or non-tariff barriers to protect their own markets and restrict the import of foreign products. Since China’s reform and opening up, foreign trade