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In honor of Zhang's achievements in science and technological innovation, his Pal Cui Ziyu (Cui Yuan) wrote a memorial inscription on his burial stele, that has been preserved while in the Guwen yuan.[8] Cui said, "[Zhang Heng's] mathematical computations exhausted (the riddles of) the heavens as well as earth. His inventions were being comparable

Odometer cart from the stone rubbing of an Eastern Han dynasty tomb, c.?one hundred twenty five Historical Chinese texts explain the mechanical carriage's functions; right after just one li was traversed, a mechanically driven wooden figure struck a drum, and soon after 10 li had been coated, One more picket figure struck a gong or even a bell with

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