Your question is about introducing finance, right? I will tell you the answer in combination with my textbook: (1) Mathematics: Calculus (unary and multivariate), statistics, probability theory, linear algebra, econometric statistics.

(2) Economics: Only elementary and intermediate economics are needed.

(3) Corporate Finance: Corporate Finance (Ross)

(4) Investment: investment, futures options and their derivatives, securities investment and various risk analysis.

(5) Financial engineering: Only the foundation is needed.

(6) Economic history: Chinese and foreign (basic, very simple).

(7) Insurance: If you major in finance, you only need the foundation.

(8) Finance: only the most basic.

To sum up: the focus is on investment and corporate finance, and mathematics and economics are the foundation. After answering, play with your hands.