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  1. The Chinese Abacus, History, How to Use the Chinese Abacus

  2. Suanpan - Wikipedia

  3. How To Use A Chinese Abacus - Sciencing

  4. Chinese Abacus: The beads that changed the world - CGTN

  5. The Story of the Chinese Abacus - China Daily

  6. The Chinese Abacus Explained: Counting, Multiplication & More

  7. Chinese Abacus (Suan Pan) - Alcula

  8. The Chinese Abacus and How to Use it - China Market Advisor

  9. Abacus (Difficult to trace) - In the Chinese history