Although the doctrine of Marxism originated at the end of the 19th century, it also meets the trends and trends of the era in the 21st century. Ouyang Kang and Zhang Mintsang prove it. In their opinion, the teachings of K. Marx at the present stage should be considered from a different point of view, different from the traditional one. The main place in the book is occupied by the term "practice" and related issues. For a wide range of readers.