It is very important to choose a suitable postgraduate training institution when preparing for postgraduate mathematics. Here are some suggestions:

1. Understand the faculty of institutions: Choose institutions with rich teaching experience and qualifications, and their teachers can usually provide high-quality teaching and guidance. You can learn about the faculty of an institution by seeing its official website, consulting seniors or attending an audition course.

2. Investigate the teaching quality of institutions: We can evaluate the teaching quality of institutions by looking at their teaching achievements, students' evaluation and word of mouth. You can ask the students who have participated in the training of this institution about their learning experience and effects.

3. Compare the curriculum of different institutions: Different institutions may have different curriculum and teaching methods. According to your own learning needs and time schedule, you can compare the curriculum settings of different institutions and choose the course that suits you.

4. Consider the geographical location and convenient transportation of the institution: Choosing an institution with convenient geographical location and convenient transportation can reduce the time and cost of going to and from class.

5. Consider the price and service of the institution: price is an important factor in choosing a training institution, but we should not just look at the price and ignore the quality of service. You can compare the prices and services of different institutions and choose institutions with higher prices.

6. Participate in the audition course: you can participate in the audition course of the organization, experience the teaching environment and teaching quality personally, and better judge whether it is suitable for you.

In short, choosing a suitable postgraduate training institution needs to comprehensively consider many factors, including teachers, teaching quality, curriculum, geographical location, price and service. The most important thing is to make a choice according to your own learning needs and actual situation.