Across
- 3. oldest confirmed surviving firearm
- 6. Also known as the Yin dynasty
- 7. the last ruler of China
Down
- 1. a form of medically inserting many needles into the skin that was invented by ancient Chinese people
- 2. another name for China
- 4. a device used to record and detect earthquakes that was invented by the ancient Chinese people
- 5. the most commonly used invention made by Chinese