Research on the Changes and Measures of the Central Government of China in the Governance of Hong Kong and Macao Special Administrative Regions since the Late 1990s*

On the basis of reviewing Hong Kong's sovereignty and Macao's sovereignty returning to China before and after their sovereignty return to China, the article analyzes the changes in the United Front Work in Hong Kong and Macao since the 16th National Congress of the Communist Party of China, and reflected on the success or failure of the United Front Work in Hong Kong and Macao during the post-return period. It discussed the Hong Kong and Macao united front work in the era of comprehensive governance before the 18th National Congress of the Communist Party of China and before the 19th National Congress of the Communist Party of China, and proposed from the three dimensions of Hong Kong and Macao, national and international. Do a good job in the new era of Hong Kong and Macao's united front work after the convening of the 19th National Congress of the Communist Party of China in 2017.