What city represents a black hole because its national ideology has actively discouraged global economic connections?

Question

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Pyongyang, the capital of North Korea, represents a black hole because the national ideology of Juche actively discourages global economic connections. North Korea has imposed strict economic sanctions on itself, limiting trade with other countries and keeping its economy closed off from the rest of the world. This has resulted in a lack of economic development and prosperity for its citizens.

What City Represents a Black Hole Because Its National Ideology