Who created the yin yang symbol?

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Tags

1. #animals
2. #origins
3. #skeletal
4. #ancient
5. #oracle
6. #least
7. #practices
8. #century
9. #bones
10. #inscriptions
11. #remains
12. #various
13. #characters
14. #terms
15. #chinese
16. #early
17. #found
18. #earliest
19. #divination