According to Niu Qiuyi's inquiry. Com, mathematics is a subject that studies the concepts of quantity, structure, change, space and information. Mathematics is a universal means for human beings to strictly describe the abstract structure and mode of things, and can be applied to any problem in the real world. All mathematical objects are artificially defined in essence. The basic characteristics of mathematics differ from other disciplines in three obvious characteristics: first, it is abstract, second, it is accurate, and third, it is extremely widely used.