Hong Kong
Hong Kong is a a populous city of almost 7 million in Southeast Asia, and a Special Administration Region of China. It is adjacent to Guandong Province of China to the North, and is otherwise surrounded by the South China Sea.
The island of Hong Kong was taken over from the Chinese, initially by the Dutch, and then by the British, during the 18th Century. The opium wars between Britain and China resulted in Britain obtaining a lease to expand Hong Kong, deeper into the New Territories of the Kowloon Peninsula. In 1997, at the end of the 100 year lease, the whole of the Hong Kong territory was returned to China. The Chinese instituted a system of "One Country, Two Systems." This created China's first Special Administration Region in Hong Kong. As a result, Hong Kong is highly autonomous with its own government and laws, distinct from that of the rest of the Peoples Republic. Hong Kong maintains its own Immigration and Custom controls and travel between the SAR and the mainland requires the same documentation, checks and procedures as traveling to a foreign country.