Over the past 100 years since its founding, the Communist Party of China has led the Chinese people to unremittingly explore the institutional advantages of socialism with Chinese characteristics. It has gone through the initial exploration of the institutional model in the period of New Democratic Revolution, the continuous formation of the institutional advantages in the period of socialist construction, the continuous display of the institutional advantages in the period of reform and opening up, the continuous perfection of the institutional system in the new era and the 100 years of comprehensive stimulation of the institutional advantages. The fourth plenary session of the 19th CPC Central Committee summarized these significant advantages into 13 aspects. The formation and manifestation of these significant institutional advantages is a sign of a more mature socialist system with Chinese characteristics and a fundamental embodiment of the CPC's original intention. Summing up the historical experience of the Communist Party of China in exploring the advantages of the socialist system with Chinese characteristics has a direct enlightenment on the new journey of socialist modernization with Chinese characteristics.