Every country has its own culture. American culture has always been open. Studying in the United States, campus culture really needs to do some homework in advance. In the United States, what kind of mentality should be used to spend college life? American universities, adhering to the "lenient entry and strict exit"; In China, however, it is a "strict entry and wide exit" mode, and many China graduates are unemployed and can't find handy jobs. In the United States, it is normal to spend an average of more than 40 hours a week to finish homework (in-class+after-class). Truancy is a very bad thing in the United States, and the worst consequence is to open a school.