Across
- 2. system Mesopotamia
- 4. Chinese monks
- 5. Chinese alchemist
- 7. a ruling family
- 8. rode a network of routes used by traders for more than 1,500 years
Down
- 1. ancient Sumerians
- 3. Ts'ai Lun
- 4. wall First Emperor
- 6. China
- 9. the Egyptians and the Chinese