In-service graduate students have a major in mathematics. Universities and colleges offer in-service postgraduate mathematics courses. These courses are designed to provide further academic opportunities for professionals who have already worked in the field of mathematics. The course content of in-service graduate students majoring in mathematics covers advanced mathematics theory, applied mathematics, numerical calculation, statistics and other fields. Through these courses, you can study the theory and application of mathematics in depth and improve your professional ability and knowledge level in the field of mathematics.