OCTs

"One country, two systems" is an idea originally proposed by Deng Xiaoping during the early 1980s, then Paramount Leader of the People's Republic of China (PRC), for the reunification of China. He suggested that there will be only one China, but areas such as Hong Kong, Macau and Taiwan can have their own capitalist economic and political systems, while the rest of China uses the "socialist" system. Under his suggestion, Taiwan can even keep its own military, though it cannot have any direct diplomatic relationship with other countries.
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