"One country, two systems" means one country, two systems. The return of Hong Kong and Macao to the motherland has enriched the theory and practice of "one country, two systems". Facts have proved that the principle of "one country, two systems" is correct and has great vitality. The policy of "one country, two systems" and a high degree of autonomy has maintained the prosperity, stability and development of Hong Kong and Macao Special Administrative Regions. The mainland and Taiwan Province Province belong to the same China. "One country, two systems" is the best way for cross-strait reunification. "One country, two systems" can not only embody the principle of realizing the reunification of the motherland and safeguarding national sovereignty and territorial integrity, but also fully consider the history and reality of Taiwan Province Province, which is conducive to realizing the reunification of the motherland at an early date, maintaining the stability of Taiwan Province Province, and promoting the modernization of China and the rejuvenation of the whole Chinese nation.