- #1
onexuan
- How did you find PF?
Hello, I am coming...
I study ancient Chinese math, "Great Second" "Six ninth heavenly stem" "Odd door flee First" "Zhou Change" etc. Hope can help each other.
I study ancient Chinese math, "Great Second" "Six ninth heavenly stem" "Odd door flee First" "Zhou Change" etc. Hope can help each other.
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