Mukund's halloween crossword puzzle

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Across
  1. 2. Important transportation tool
  2. 5. important trade city
  3. 7. Java dynasty
  4. 8. spread Islam
  5. 14. postal system
  6. 16. Grandson of Genghis
  7. 18. Changed Confucianism
  8. 19. Urban trade center in Americas
  9. 20. first foreign Chinese dynasty
Down
  1. 1. African tribal storyteller
  2. 3. Largest religious structure
  3. 4. Famous ruler who made Beijing forbidden city
  4. 6. Chacoan culture
  5. 9. Buddhism+Daoism
  6. 10. Important center for Islam
  7. 11. people who share national origin
  8. 12. Order for payment
  9. 13. Mongol merchant associations
  10. 15. Richest person
  11. 17. Chinese admiral