The era of gradually realizing common prosperity for all the people is an era when all the Chinese people work together to realize the Chinese dream of the great rejuvenation of the Chinese nation. It is an era when China is increasingly approaching the center of the world stage and making greater contributions to mankind. Orientation determines strategy. Under the new historical conditions, we should never forget our original intention and our mission. Realizing the great rejuvenation of the Chinese nation is the historical mission of the Communist Party of China in the new era, which is also the greatest dream of the Chinese nation since modern times. The report of the 19th National Congress of the Communist Party of China pointed out that to enter a new era and realize great dreams, we must carry out great struggles, build great projects and promote great undertakings. From the perspective of the historical process of the rejuvenation of the Chinese nation, the entry of socialism with Chinese characteristics into a new era means that the long suffering Chinese nation in modern times has ushered in a great leap from standing up, becoming rich to becoming strong, and ushered in a bright prospect of realizing the great rejuvenation of the Chinese nation. From the perspective of the development process of scientific socialism, the entry of socialism with Chinese characteristics into a new era means that scientific socialism is full of strong vitality in China in the 21st century and holds high the great banner of socialism with Chinese characteristics in the world. From the perspective of the historical process of mankind, socialism with Chinese characteristics has entered a new era, which means that the road, theory, system and culture of socialism with Chinese characteristics have been developing continuously, expanding the way for developing countries to move towards modernization, providing new choices for countries and nations in the world who both hope to accelerate development and maintain their independence, and contributing Chinese wisdom and Chinese solutions to solving human problems. From the perspective of China's modern history and world history, the new era of socialism with Chinese characteristics is a new era in which China is bound to realize the Chinese dream of the great rejuvenation of the Chinese nation, a new era in which scientific socialism will shine brightly, and a new era in which a powerful modern socialist country that is constantly deepening reform and opening up, prosperous, strong, democratic, civilized, harmonious and beautiful will be built. Time is the mother of thought, and practice is the source of theory. To lead the new era, we must be good at listening to the voice of the times, and have the courage to adhere to the truth and correct mistakes. There is no end to practice and theoretical innovation. To lead the new era, we must keep up with the times in theory, constantly understand the laws, and constantly promote theoretical, practical, institutional, cultural and other innovations. (outlook new era)