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History, which studies human history, is also called history. History is a form of knowledge in which human beings screen and combine their own historical materials. It is a concept of dynamic space in static time, which consists of five parts: history, science, philosophy, humanities and its time and space.

History is juxtaposed with science, engineering, agriculture, medicine, philosophy, economics, law, teaching, literature, military science, management and art, which constitutes the discipline system of higher education in China. A bachelor's degree in history is usually awarded after graduating from a university majoring in history and meeting the conditions for granting a bachelor's degree.

The broad sense of "history" is the unity of "history has two meanings" produced by the synchronous training of "history", including the objective existence and development process of human society in the past completely independent of people's consciousness, as well as the spiritual production practices and products created by historians to describe and explore this objective existence and process and its laws.

The narrow sense of historiography refers to the latter, which is the unity of spiritual production and practice, and what it creates belongs to ideology.

Because of the different angles and starting points of historians' investigation, there are different definitions of "activity", "learning" or "learning", "knowledge system", "science", "art", "semi-science and semi-art" and "synthesis". History majors mainly include China history, world history and archaeology, as well as museums, ethnology and cultural relics.

"History has two meanings" and the theories of modern people's activities, learning or learning, knowledge system, super science or semi-science, semi-art and science can all be regarded as the objective existence facts corresponding to history for the first, second, third and fourth times in its development process. Among them,

The general "science" theory and the other two historical explanations in the "science" theory respectively reflect two different periods in the fourth development era of history;

As for the latter, more precisely, it is a manifestation of the objective existence of contemporary historical practice in the form of historian theory, that is, it is the theoretical result of historical theorists' abstract understanding of contemporary historical practice. However, there are different opinions in China historians today, which is only a practical reflection of the confusion caused by the increasingly complex and diverse chaotic reality of historical practice in historians' minds;

Moreover, their respective definitions of history are largely influenced by the academic background of the definer and the specific content of the research object.