The moon's orbiting speed around the earth is sometimes fast and sometimes slow. From "Sho" to "Wang" and then to "Sho", the average cycle experienced is 29.53 days. Therefore, although the average time required for the moon to go from "Sho" to "Wang" is about 14 days, 18 hours and 22 minutes, it will actually be slightly longer and sometimes shorter than this average time.
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