Mathematics in ancient China was practical, but it stagnated after the Song Dynasty because there was no theoretical basis. Western mathematics is a pure way of thinking and an abstract tool, which gradually moves towards rationality, so that all we are learning now are western mathematics.
Pure mathematics may be useless for the time being, but it may be useful in a few hundred years. For example, matrix, number theory, group theory, Riemannian geometry, partial differential equations ... were all pure mathematical theories at first. But now it is widely used in engineering calculation, cryptography, relativity, astronomy and physics.
The purpose of applying mathematics is to find solutions to problems. Among them, mathematical modeling, operational research and game theory are widely used in finance, economy, market analysis and company operation.
Mathematics is a way of thinking, so mathematics involves all aspects of society.
Among them, complex mathematical theory and physics are often the closest, and have strong links with information science and computer science. Applied mathematics is closely integrated with engineering science, economy and finance, and market management.
For most people, mathematics is a problem-solving tool, abstracting problems, modeling, solving mathematical equations, and reducing the results to the results of solving problems.
Only a few mathematicians do theoretical research and provide possible advanced solutions for the future development of science. Quite a few mathematicians have entered the fields of economics and information science. For example, more than half of the Nobel Prize in Economics graduated from mathematics, and a considerable part of the inventor von Neumann (mathematician) in the computer field and the winner of the Turing Prize, the highest prize in the computer field (Turing is also a mathematician) also came from mathematics.
Of course, a little knowledge of addition, subtraction, multiplication and division is enough to calculate your salary and bonus if it doesn't involve complex problems in natural disciplines such as finance, engineering application, mathematics, physics and chemistry.
Hope to adopt, thank you.