Simply put, it is to dialectically analyze the reasons for historical development or promote history with a rational and objective mind. This is historical materialist dialectics. It includes materialism, dialectics and historical view. Materialism emphasizes material attributes, objective laws and rationality, while dialectics emphasizes looking at problems from different angles, development and connections. When we use materialism and dialectics to study and find the causes of historical development, we call this method of studying history historical materialism dialectics.