Not really sure, but it's possible "pi" is the Chinese unit of length "chi" which could be 33-1/3 cm so 2 pi is roughly 67 cm.
Then "po" might be "cun" which is 3-1/3 cm. You'd have to try to match up the Chinese characters to see if you can figure out the exact units.
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| 03/09/2016, 7:59 PM | units of LENGTH po and pi |
| 03/10/2016, 10:42 AM | Re: units of LENGTH po and pi |