Geography China puzzle

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Across
  1. 3. - helped to protect it against invaders
  2. 6. - a main sea of China
  3. 7. - it helped the Chinese to have fertile soil and we’re able to grow crops and keep livestock
  4. 10. - one of the plains in China
  5. 12. - One of the tallest mountains in the world
  6. 13. - a sea in china
  7. 16. - largest desert in Asia ??
  8. 17. - topic
  9. 18. - it’s hard to cross the walls of China
  10. 20. - one of the main 2 rivers in China
Down
  1. 1. - A wall of mountains
  2. 2. - a place higher than normal land height
  3. 4. - even if the rivers bring destruction people still live around the rivers because of the land
  4. 5. - Largest desert in China??
  5. 8. - low in the east and high in the west
  6. 9. - a main river in China
  7. 11. - it’s hard to cross the walls of China
  8. 14. - Although it helped china to make fertile soil it is also a disaster as it floods the places around it
  9. 15. - It helped the Chinese to grow better than other civilizations
  10. 19. - A set of mountains like Himalaya mountain