China had always tried to keep foreign influence out of China but from my own knowledge, the Boxer Rebellion, of which the main objective was driving out Western (as well as Japanese) Imperial powers. The Eight-Nation alliance, comprised Japan<span>, </span>Russia<span>, the </span>British Empire<span>, </span>France<span>, the </span>United States<span>, </span>Germany, Italy<span> and </span>Austria-Hungary, was created in order to protect the trade ports of which are essentially European colonies (since European laws only applied in those areas and often stationed some number of troops) acquired through two Opium wars and a collection of (dubbed) "Unequal treaties" (which they really were, for example, a portion of Shanghai was handed over to the colonising powers). With all this humiliation, it's no surprise that the Chinese would want to drive western influence out of China. Evidently, that endeavour has failed.
Answer: It is considered a sovereign state (single entity). The central government has unlimited powers. Power is only delegated to others if the government decides.