SS Crossword puzzle 1

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Across
  1. 6. South of the Yellow River
  2. 7. Cutting contact with other countries
  3. 8. Founder of the Yuan Dynasty
  4. 9. ____ Desert
  5. 10. Ocean providing protection for China
Down
  1. 1. _____ ____ of China
  2. 2. Chinese explorer
  3. 3. Chinese invention, first used in fireworks
  4. 4. Trade route between Asia and Europe
  5. 5. _________ Mountains
  6. 11. Chinese navigation device that always points north