+The Open Door Policy was a principle of international relations, advocating equal commercial opportunities for all nations within a foreign territory. Primarily applied to [China](/wiki/china) from the late 19th century, it sought to prevent a single power from dominating [trade](/wiki/trade) and resources, aiming to preserve territorial integrity.
+## See also
+- [Diplomacy](/wiki/diplomacy)
+- [Imperialism](/wiki/imperialism)
+- [Sovereignty](/wiki/sovereignty)
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