Tributary system of China - Wikipedia
https://en.wikipedia.org/wiki/Tributary_system_of_China
The "tribute system" is often associated with a "Confucian world order", under which neighboring states complied and participated in the "tribute system" to secure guarantees of peace, investiture, and trading opportunities. One member acknowledged another's position as superior, and the superior would bestow investiture upon them in the form of a crown, official seal, and formal robes, to ...
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