1. Know the enrollment requirements in advance: Learn the enrollment requirements of graduate students in the Department of Mathematics of Sun Yat-sen University in detail, including academic background, professional course requirements, English level, etc. Make sure you meet these requirements and prepare relevant materials.

2. Strengthen the basic knowledge of mathematics: the learning content of graduate students in mathematics department is more in-depth and complicated, so you need to strengthen the learning of basic knowledge of mathematics. Review advanced mathematics, linear algebra, probability theory and other basic courses, and do some related exercises and exercises.

3. Improve English: Chinese is usually the teaching language for graduate students in the Department of Mathematics of Sun Yat-sen University, but English is still very important in academic research. Improving your English can help you better understand and read international academic documents and communicate with international scholars.

4. Accumulate scientific research experience: At the undergraduate stage, try to participate in some scientific research projects or internship opportunities to accumulate scientific research experience. This will not only improve your academic ability, but also increase the competitiveness of your graduate application.

5. Prepare for the postgraduate entrance examination: If your bachelor's degree does not meet the requirements of the graduate students in the Department of Mathematics of Sun Yat-sen University, you may need to take the postgraduate entrance examination. Understand the content and requirements of postgraduate entrance examination in advance, make a reasonable preparation plan and review systematically.

6. Find a tutor: Before applying for a graduate student, I suggest you contact a professor or tutor in the Department of Mathematics of Sun Yat-sen University in advance to find out their research direction and enrollment plan. If there is an opportunity, you can try to communicate with them and show your research interest and potential.

7. Participate in academic exchange activities: participate in academic conferences, seminars and other activities to exchange learning with other scholars. This will not only broaden your academic horizons, but also establish academic contacts and lay the foundation for future research and development.