China has become the world's second largest economy in a relatively short period of time, especially when the epidemic is raging around the world. Not only has China effectively controlled the epidemic, but it is also the only major economy that has achieved positive growth. The success of China's economic development can be called a miracle, and it has provided abundant practical soil for the development of China's economics. Chinese economics is rooted in the land of China and has distinctive Chinese characteristics. The rich practice of reform and opening up and socialist modernization is the "rich mine" of its research and development, and its theoretical innovations are written on the land of China. Xi Jinping's Economic Thought on Socialism with Chinese Characteristics for the New Era is the latest achievement of the political economy of socialism with Chinese characteristics. It has made breakthroughs in development stage theory, economic system theory, economic development theory, and economic operation theory. Economics has made original contributions and is the fundamental guiding ideology of China's economic development and a valuable asset of China's economics.This paper discusses the theoretical progress of China's economic development stage, economic system, economic development and economic operation.
