At that time, the American government relaxed the conditions of bank loans, so some people with bad reputation could also borrow money to buy houses and other daily necessities, and the repayment time was long, so more people with bad reputation came to borrow money, but they never thought about how to repay the loan in the future. Once the deadline is up, these people with bad reputation can't get the money, which leads to a lot of bad debts in the bank and the bank can't get the money back, so other financial institutions with business relations with the bank are also implicated. The so-called "fire at the city gate" is like the first domino falling down, and then the second and third domino falling down, which triggered a financial crisis. The only way for foreign governments to solve the financial crisis is to nationalize banks, which was first implemented by British Prime Minister Gordon Brown. However, it is indisputable that nationalization is socialism, which has laid another foreshadowing for the demise of capitalism!