Sofia's Ancient China puzzle

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Across
  1. 7. China's first center of civilization
  2. 8. Farming technique
  3. 9. China's first capitol
  4. 10. China's first great thinker
Down
  1. 1. Characters that stand for objects
  2. 2. Famous for their works of ______
  3. 3. Promoted legalism
  4. 4. Built China's first capitols
  5. 5. China's longest river
  6. 6. Promoted Daoisim