The previous capitalist system and way of life in Hong Kong shall remain unchanged for _________ years.

The principle that the previous capitalist system and way of life in Hong Kong shall remain unchanged for 50 years is rooted in the Basic Law, which is Hong Kong's constitutional document. This commitment is part of the "one country, two systems" framework established following the handover of Hong Kong from British to Chinese sovereignty in 1997.

Specifically, the Basic Law guarantees that Hong Kong's existing economic and social systems, including its capitalist way of life, will remain intact for 50 years after the handover. This means that from 1997, the agreed period during which Hong Kong would maintain its unique systems and lifestyle is until 2047. This provision reflects the commitment to allow Hong Kong a degree of autonomy, preserving its capitalist economy and freedoms even while being part of the People's Republic of China.

The other options incorrectly suggest shorter time frames that do not correspond to the provisions laid out in the Basic Law, which emphasizes stability and the long-term preservation of Hong Kong's established way of life. Understanding this duration is crucial for recognizing the legal and political commitments made during the transition of sovereignty.