Abstract: After the Opium War in 1840,followed by the continuous invasion of imperialist countries and the signing of a series of unequal treaties,China became a semi-colonial and semi-feudal society.In order to resist their aggression,oppression and exploitation,the Chinese nation rose up in blood and fire,and gradually transformed from an ancient self-being nation into a modern self-conscious nation.The completion of this transformation formed the Chinese United Front against Japanese Aggression under the leadership of the Communist Party of China,and achieved the great victory of the Chinese People's War against Japanese Aggression and the War of Liberation.The founding of the People's Republic of China in October 1949 marked the starting point of the rejuvenation of the Chinese nation.Since the 1950s,China has carried out socialist revolution and construction,and profound changes have taken place in society.In December 1978,the Third Plenary Session of the 11th Communist Party of China Central Committee started the historical process of Reform and Opening-up and socialist modernization.The Chinese nation entered a new era of building socialism with Chinese characteristics and achieved unprecedented achievements.Since the 18th National Congress of the Communist Party of China,under the strong leadership of the Central Committee of the Communist Party of China with Comrade Xi Jinping at its core,people of all ethnic groups in China have entered a new era of building a strong country and rejuvenating the nation,and have comprehensively promoted the Chinese nation towards a glorious prospect of great rejuvenation with Chinese-style modernization.

Key words: Chinese nation, self-being—self-consciousness, Chinese United Front against Japanese Aggression, the 18th National Congress of the Communist Party of China, great rejuvenation