The document summarizes the origins and impacts of the compass and wheelbarrow in ancient China. The compass, made of lodestone or magnetite ore, was first used around the late Qin/early Han dynasties for divination and prognostication before being used for navigation. It helped solidify political power and benefitted the economy and social practices. The single-wheeled wheelbarrow, used by farmers, builders and soldiers, also positively impacted the economy and society while demonstrating an important technological achievement for its time.

3. The COmpass

7. THe WheelBarrow