From the Document: "The Hong Kong Special Administrative Region (HKSAR, or Hong Kong) is a city located off the southern coast of Guangdong Province, People's Republic of China (PRC or China). More than 90% of Hong Kong's population is ethnically Chinese. The first language of the vast majority is Cantonese, a variety of Chinese different from what is spoken in most of China. In part because of its different language and long history as a British colony (1842 to 1997), the people of Hong Kong ('Hong Kongers') have a cultural and social identity distinct from that of Mainland China ('Mainlanders'). This includes a legacy of laissez-faire economics and a common law legal system adopted from the British legal system, along with a passionate support for universal human rights."
CRS In Focus, IF10956
Congressional Research Service: https://crsreports.congress.gov/