What were ancient Chinese coins used for?

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Tags

1. #about
2. #exchange
3. #brick
4. #ancient
5. #precious
6. #currency
7. #widely
8. #cowry
9. #shells
10. #medium
11. #since
12. #stones
13. #circulated
14. #became
15. #common
16. #years
17. #neolithic
18. #coins
19. #chinese
20. #dynasty
21. #china