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The kingdom was first granted an official seal by the [[Hongwu Emperor]] of the Ming Dynasty in the 1370s, following the kingdom of [[Chuzan|Chûzan]] sending a formal tribute mission for the first time in [[1372]].
The kingdom was first granted an official seal by the [[Hongwu Emperor]] of the Ming Dynasty in the 1370s, following the kingdom of [[Chuzan|Chûzan]] sending a formal tribute mission for the first time in [[1372]].
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The seal was of a style known as "camel-back," as it had a grip shaped like a camel's hump. Like those issued to Vietnam, Siam, and
Crown Prince [[Sho Tei|Shô Tei]] journeyed to China in [[1654]] and returned the royal seal bestowed upon the kingdom by the Ming, receiving an official seal from the Qing in its place.<ref>Angela Schottenhammer, “Empire and Periphery? The Qing Empire’s Relations with Japan and the Ryūkyūs (1644–c. 1800), a Comparison.” ''The Medieval History Journal'' 16, no. 1 (April 1, 2013): 176-179.</ref>
Crown Prince [[Sho Tei|Shô Tei]] journeyed to China in [[1654]] and returned the royal seal bestowed upon the kingdom by the Ming, receiving an official seal from the Qing in its place.<ref>Angela Schottenhammer, “Empire and Periphery? The Qing Empire’s Relations with Japan and the Ryūkyūs (1644–c. 1800), a Comparison.” ''The Medieval History Journal'' 16, no. 1 (April 1, 2013): 176-179.</ref>