The financial crisis triggered by the American subprime mortgage crisis spread all over the world and China. Part of the country's foreign exchange reserves are lost, export is difficult, economic growth is slowing down, unemployment is increasing, people's income is falling, consumption is decreasing, and the market is depressed. In serious cases, it will lead to political instability. Compared with European countries (such as Detroit Auto City), the financial crisis has little impact on China, because China's economy is separated from the international economy to some extent. China's RMB is strictly managed under the capital account, and the impact of international hot money is not great. At present, more than 70 banks in the United States tend to close down. China's financial system is operating well and its economy has maintained a certain growth. At the same time, the state is also taking measures, such as expanding finance, reducing the deposit reserve ratio and stimulating domestic demand of 4 trillion yuan. Now, the RMB exchange rate has been lowered. If all macroeconomic measures are effectively implemented, China will be relieved in about 1 year. Judging from the current economic data, it has improved after May, and the end may be after 1 year. Internationally, the time will be longer. It takes at least three years for the economy to ease, because it takes about three years for commercial banks affected by the financial crisis to adjust, and it takes about three years for economic development affected by the financial crisis to recover.