Abstract: Marxism has been fully tested as a scientific truth in China, which is shown not only in the Marxist world outlook and methodology, but also in its scientific belief. The people-centered nature and practicality of Marxism have been fully implemented in China, which is reflected in the historical experience of the Communist Party of China (CPC) that emphasizes the supremacy of the people and its people-centered philosophy of development, as well as in its emphasis on never rigid innovations. The openness and contemporary relevance of Marxism have been fully demonstrated in China via the three historical steps of the CPC in adapting Marxism to the Chinese context.