The "two combinations" reveal the scientific law of the sinicization and modernization of Marxism. As a scientific truth, Marxism profoundly reveals the universal law of the development of nature, human society and human thinking. Marxist theory is not a dogma, but a guide to action. It must use its scientific truth to solve specific practical problems in various countries. As Engels said: "Marx's entire world outlook is not a doctrine, but a method." A history of the development of Marxism is a history of continuous development of Marxism according to the times, practice and understanding. Since its founding, the CPC has written Marxism on its own banner, treated Marxism with a scientific attitude, combined the basic principles of Marxism with China's specific reality, formed theoretical achievements that keep pace with the times, and successfully opened up the right path to realize the great rejuvenation of the Chinese nation. The excellent traditional Chinese culture is the root and soul of the Chinese nation, and is the cultural fertile soil where socialism with Chinese characteristics is rooted. The CPC has deeply realized that the basic principles of Marxism must be combined with the excellent traditional Chinese culture, and give its people an acceptable form of expression. Mao Zedong pointed out: "From Confucius to Sun Yat sen, we should sum up and inherit this precious heritage." Deng Xiaoping put forward the development goal of building a "well-off society", fully drawing on the discussion in the Book of Rites · Ritual Transport. The people of the CPC have linked up the essence of Marxism with the essence of China's excellent traditional culture and the common values of the people, which are "daily used without being aware of". They have constantly endowed scientific theories with distinctive Chinese characteristics, and formed a series of major achievements in the sinicization and modernization of Marxism. The new assertion of "two combinations" fully demonstrates the essential characteristics and powerful force of Marxist truth, and demonstrates the lasting charm and era value of the excellent traditional Chinese culture. The "two combinations" have opened up a new realm of sinicization and modernization of Marxism. Since the 18th National Congress of the Communist Party of China, the CPC has faced the new era in accordance with new changes in domestic and international situations and new requirements of practice