Trump, the US Republican presidential candidate, advocates a 45% tariff on Chinese imports to safeguard the US economic interests and incur many criticisms. The US media commented on July 24, 2016 that many economists have pointed out that this proposition will trigger a new round of trade war. Not only that, but the practice of imposing tariffs to protect a country’s trade is virtually ineffective. The article also elaborates on the practice of levying tariffs on Chinese tires. The report said that the United States imposed a high tariff on imported goods, and the results were generally unsatisfactory. In the past 35 years, the United States has often adopted trade protection measures to impose tariffs and quotas on a range of imported products, including electronics, socks, steel, automobiles and solar cells. However, these protective measures have little impact on stimulating domestic production and increasing employment. The article believes that the main reason for this phenomenon is that the government's use of tariffs is often too late, tariffs are bypassed, and other countries will emerge to make up for the gap left by the sanctioned countries. For example, the Obama administration has paid a heavy tax on Chinese tire products in 2009 to cater to the demands of the labor organization. Although it seems that this move seems to be effective: China's tire exports to the US fell by 28% to 899 million in 2010. However, the United States has seen a surge in tire imports from South Korea, Thailand, Indonesia and other countries, filling the gap in China's imports of tires to the United States. After the introduction of tariff measures in 2009, US tire production increased as expected. According to data provided by the American Rubber Manufacturers Association (RMA), the production of American car tires and light truck tires increased by 14% in 2010, reversing the decline in the past few years. At the same time, however, tire imports have increased significantly, increasing by 18% from 2009 to 2010. According to analysis, the development of the US tire industry at that time was due to the economic recovery of the United States in mid-2009. With the development of the manufacturing industry, the US economy has grown, and the automotive industry, the tire industry, imports and exports have all grown. But the rise in tire prices, while benefiting American manufacturers, has hurt the interests of tire sellers. The Peterson Institute for International Economics said that tariff protection measures saved 1,200 manufacturing jobs to the greatest extent, but the sharp increase in US tire consumption costs led to the loss of 2,500 US retail jobs. In addition, trade experts believe that if the currency of the exporting country depreciates, it will also reduce the effectiveness of tariff measures. William Reinsch, an international trade expert at the Stimson Center, a US government think tank, said that although tariffs can bring certain benefits, they can also include supply chain disruptions, rising prices, and sanctioned countries. A series of serious consequences, such as counterattacks, "should seek new ways to promote the US economy." Pipe Cutting Machine,Automatic Tube Cutting Machine,Tube Cutting Machine,Hydraulic Pipe Cutting Machine Zhangjiagang heshun machinery manufacturer co.,ltd. , https://www.hspipemachine.com