Dialectical materialism tells us that a basic prerequisite for carrying out our work correctly is to proceed from reality and recognize our own environment and situation.

Connotation and extension of science;

Science is not faith, but speaking with evidence. It is an attitude, viewpoint and method. At the same time, scientific things themselves have paradoxes. In other words, things in different professional disciplines are easily confused and considered contradictory. In fact, it reflects the scientific understanding of different and complex aspects of things.

Science is a practical activity that combines subjective understanding with objective reality. It is a bridge to the expected goal and a link between reality and ideal. It can also be said that science is to make subjective knowledge conform to objective reality (the original appearance of objective things, including the law of real connection and change). ) and create practical activities that conform to the objective reality (things, conditions and environment) of subjective understanding.

Science is a real attribute that conforms to objective reality, and it is an attribute that subjective understanding and objective reality can achieve concrete unity (whether it is science or not, science refers to science. ), it makes subjective knowledge conform to objective reality, and the practical process of exploring and creating objective reality that conforms to subjective knowledge is scientific research.

Science and technology are methods, measures and means to create objective reality that conforms to subjective understanding (to achieve the expected goal); The practical activity of creating objective reality in line with subjective understanding is applied science; Subjective knowledge that conforms to objective reality is scientific knowledge; The universal law that conforms to objective reality is scientific theory.