Question: A seismometer during the Han dynasty used what type of pendulum?

Is 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. a good answer to this question?

Possible answers:
-- yes;
-- no;
yes