There is basically no need for mathematical foundation, and social research methods will involve some statistical things, which is relatively easy to understand. It also depends on the focus of professional courses in the school you apply for. Sociology majors in general schools are relatively single in sociological research methods, and most of the calculation problems are complete sets of formulas. However, some schools especially emphasize this point. For example, the sociology of Fudan University requires 3. It is suggested that the landlord can first study the real problems of each school over the years and choose the school that suits him!