Ancient China Crossword Puzzle

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Across
  1. 3. Chinese write using symbols and ________
  2. 5. Mountain range with the highest peaks on Earth
  3. 6. Longest river in Asia
  4. 8. Cloth made from worms that is light but warm
  5. 9. Chinese used to use these as war weapons
Down
  1. 1. River that flows through much of China
  2. 2. Chinese used this to measure the distance of enemies
  3. 3. Chinese made it to tell directions when lost
  4. 4. The Chinese built this to protect from enemies
  5. 7. Biggest desert in Asia