The 'second combination' is another ideological liberation, allowing us to fully utilize the precious resources of Chinese excellent traditional culture and explore future oriented theoretical and institutional innovation in a broader cultural space. This significant statement not only has significant practical significance and profound historical significance for us to promote the 'two combinations' in the new era and new journey, And it has significant epistemological significance for us to build modern civilization of the Chinese nation. The 'second combination' provides a theoretical premise for the 'first combination'. The 'two combinations' are inherently related and inseparable, but each has its own choices and strengths. Theoretically, to realize the combination of the basic principles of Marxism with China's specific reality, we must first realize the historical transformation of Marxism from "coming to" China to "being in" China, so as to realize the modernization of Chinese Marxist philosophy in China. The primary prerequisite for solving this problem is that Marxism is "present" in China. The premise of 'integration' is mutual agreement. Marxism and the excellent traditional Chinese culture have different sources, but there is a high degree of compatibility with each other. The combination of the basic principles of Marxism with the excellent traditional Chinese culture provides a more fundamental, solid, profound, and consolidated cultural soil and theoretical premise for the 'sinicization' of Marxism and the 'sinicization' of Marxism. The second combination lays a cultural foundation for the mutual achievement of the results of the combination. For a long time, people have often focused on combining the basic principles of Marxism with China's specific reality by changing China from Marxism. In fact, China has also developed Marxism and created a Chinese version of Marxism. It is not the specific conclusions or individual words and phrases of Marx and Engels that play a guiding role in theory, but rather the Marxist worldview and methodology, which is a sinicized and modernized Marxism. "Why the CPC can and why Socialism with Chinese characteristics is good, in the final analysis, is the Marxist practice, which is Chinese and contemporary." "The second combination" not only makes Marxism take the "Chinese national form", but also creates a new cultural life body with organic unity. Let Marxism not only become China's and the times', but also let the fate of Marxism be closely linked with the fate of the CPC, the fate of the Chinese people, and the fate of the Chinese nation. The "second combination" provides historical depth for the opening, promotion, and expansion of China's road. The 18th Party Congress