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The first iron compasses created during the Han Dynasty were not used for navigation.
In fact, they were used to divine the future in large bowl-like compasses that used a spoon-like instrument.
Forks were an exclusive dining tool for the ruling class, and came in two- and three-pronged varieties like they do now. These notes were initially used only by the very wealthy, but eventually they were circulated by the Song Dynasty when there was a shortage of copper coins. These notes did not replace copper coins- they were organized by region (rather than having a national currency) and were more like credit notes with a time limit.