Pure mathematics major is unpopular, and applied mathematics is better. Mathematics is a basic subject, and doing research after graduation will have a future. Because this major is a marginal subject and not close to the market, it is definitely difficult to get employment. Applied mathematics is relatively better. But in my personal opinion, in order to find a good job in the future, I'd better fill in some majors close to the market. After all, it is the socialist market economy and social needs that determine your major.