Abstract: Since the 18th National Congress of the Communist Party of China, Xi Jinping has inherited and developed Deng Xiaopin's "one country, two systems".In combination with the great practice of "one country, two systems" in Hong Kong and Macao, he endowed the thought of "one country, two systems" with new concepts and new discussions, and pushed the great practice of "one country, two systems" to a new height.Xi Jinping has profoundly pointed out that the principle of "one country, two systems" should be upheld, and the principle of "one country, two systems" should be fully and accurately implemented, and Hong Kong and Macao should be governed in accordance with the law. The practice of "one country, two systems" in Hong Kong and Macao is an important part of the Chinese dream.Xi Jinping's enrichment and development of "one country, two systems" is an important part of his thought on governing the country and has pointed the way forward for the development of Hong Kong and Macao.