State Council Explains One Country, Two systems Policy in Hong Kong

The white paper explained that the "two systems" means that, within the "one country" the main body of the country practices socialism, Hong Kong and some other regions practice capitalism. “The ‘one country’ is the premise and basis for the ‘two systems,’ and the ‘two systems’ is subordinate to and derived from ‘one country.’ … The main body of the country must practice socialism and that will not change.” 

The white paper further stated that for Hong Kong to retain its capitalist system and enjoy a high degree of autonomy with the "Hong Kong people governing Hong Kong," “Hong Kong must fully respect the socialist system practiced on the mainland in keeping with the ‘one country’ principle and, in particular, the political system and other systems and principles in practice.” The white paper also warned that it is necessary “to stay alert to the attempts of outside forces to use Hong Kong to interfere in China’s domestic affairs and to prevent and deter attempts by a very small group of people who act in collusion with outside forces to interfere with the implementation of ‘one country, two systems’ in Hong Kong.”