Why do Chinese coins have holes in them?

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Tags

  1. #collections
  2. #produced
  3. #rough
  4. #handling
  5. #could
  6. #smooth
  7. #chinese
  8. #edges
  9. #strings
  10. #middle
  11. #threaded
  12. #filed
  13. #allow
  14. #square
  15. #coins