When was the paddle wheel boat invented in China?
While evidence of the execution of these paddle wheel boats
tells us that the Chinese had started implementing these boats in
the 4th century AD (Song Dynasty), it is argued that these boats
were invented earlier, in the Han Dynasty (206BC-220AD), where a
dictionary-like book included the word lu (scull), explaining that
the force it generated was along the ridge of the ship. Such a word
would not have been created without the concept of ship
building.