In honor of Zhang's achievements in science and technologies, his friend Cui Ziyu (Cui Yuan) wrote a memorial inscription on his burial stele, that has been preserved while in the Guwen yuan.[8] Cui mentioned, "[Zhang Heng's] mathematical computations exhausted (the riddles of) the heavens and also the earth. His innovations https://andrescjqva.therainblog.com/30782137/how-heng365-can-save-you-time-stress-and-money