Qin's use of the number six

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During the Qin dynasty, the standard unit of measure was the chi, which is a shade over 9 inches, and the next step up, their equivalent of the yard, was the bu, which is just over four and a half feet - and exactly 6 chi. This was pretty standard for most of ancient and medieval China. The Quin settled some debate about the length of the li, their equivalent of the mile, as 300bu - just over a quarter mile. The chi was divied up into units of ten, tho, with each unit just under an inch.

  • 1 cun = ~.9 inch
  • 10 cun = 1 chi = ~9 inches
  • 6 chi = 1 bu = ~4.5ft
  • 1 li = 300 bu = ~1/4 mile

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