Generally speaking, American cities can be divided into four grades according to the index of living (excluding extra expenses such as car, travel, telephone and entertainment): 1 refers to American megacities, such as San Francisco, new york, Philadelphia, Los Angeles, Boston, Miami, Hawaii, Chicago, Washington, DC, etc., and their living expenses are1000 ~. The second level refers to American big cities, such as Pittsburgh, Seattle, Dallas, Atlanta, Austin, Detroit and so on. Their living expenses are 800~ 1000 USD/month. The third level refers to some states in the south, midwest and southeast of the United States, such as Texas, Wisconsin, Illinois, Michigan, Utah, Colorado, Georgia, Virginia and North Carolina. Its living expenses are 600~800 USD/month. Level 4 Oklahoma, Missouri, Louisiana, South Carolina, etc. Their living expenses are 450~600 USD/month. Students can understand the general living conditions after studying abroad by comparing the area where they apply for the school with the current national scholarship standards.