Ancient Chinese Crossword Puzzle

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Across
  1. 4. There were 12 of them (duck)
  2. 5. China
  3. 7. Mechanism for launching things
  4. 8. Over 1500 miles long
  5. 9. Emperor of the Ming dynasty
  6. 10. The capital of China now
Down
  1. 1. Ancient animal that blows fire
  2. 2. Chinese use these for writing
  3. 3. Famous Chinese warriors
  4. 6. A religious function building