In fact, the fundamental reason why many people are entangled in graduate school is to equate money with academic qualifications. In fact, there is no necessary connection between the two. The essential purpose of graduate students is to improve the level of human knowledge, and business talents work hard for the level of wealth. Therefore, the most important criterion for measuring doctoral students is what research results they have, which is what they should do. As for the higher income level, it is only a by-product. Fortunately, knowledge economy is the general trend, and society will not be mistreated.