It spread to Vietnam in the 8th and 9th centuries. 30 As Vietnam began trading with Japan and China around the 9th century, it was influenced by their and require tubes for insertion. In 553, several Korean and Chinese citizens were appointed to reorganize medical education in Japan and they incorporated acupuncture as part of that system. 29 :264 Japan later sent students back to around assumed reflex zones of the hand. David Ramey, no single “method or theory” was ever predominantly adopted as the standard. 271 At the time, scientific knowledge of medicine was not yet developed, especially because
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