The overall economy of the United States is better, and some social welfare is much better than that of China. There are generally few people in one class in their school, and teachers mainly exercise their innovative ability and imagination, so more people have won the Nobel Prize. China has a large population and its economy is not developed enough. Only by digging out some of our best learning abilities through examinations and carrying out some training, although there are some shortcomings in exam-oriented education, it is also in line with national conditions. for reference only