The reasons are as follows:

Marxism is the system of basic theories, basic viewpoints and doctrines founded by Marx and Engels. Broadly speaking, Marxism not only refers to the basic theory, basic viewpoints and theoretical system founded by Marx and Engels, but also includes its development by its successors, that is, Marxism that is constantly developing in practice. From the perspective of modern studies, Marx had a profound impact on the mainstream of history and was of great significance to the future path.

Marxism is the scientific system of proletarian thought. Its content covers many fields and aspects such as social politics, economy, culture, military, history and the relationship between the development of human society and nature, and is profound and rich.

The vast amount of spiritual wealth left to us by Marxist classic writers, together with the theoretical achievements created by Marxists in various countries over time, constitute the ideological treasure house of the proletariat and all mankind. The ocean of knowledge formed by the many disciplines it involves is worthy of being called broad and profound, whether in the era of Marx and Engels or in a new era in which human civilization continues to develop and progress.