The exercise is to decide whether the question accepts the proposed suggestion as a correct answer. If yes, write "True", otherwise write "False".
Question: how many social classes existed in the han dynasty
Suggestion: Science and technology during the Han period saw significant advances, including papermaking , the nautical steering rudder , the use of negative numbers in mathematics , the raised-relief map , the hydraulic -powered armillary sphere for astronomy , and a seismometer employing an inverted pendulum .
