In honor of Zhang's achievements in science and technological innovation, his Buddy Cui Ziyu (Cui Yuan) wrote a memorial inscription on his burial stele, that has been preserved inside the Guwen yuan.[8] Cui said, "[Zhang Heng's] mathematical computations exhausted (the riddles of) the heavens as well as earth. His innovations https://charlieciouz.ssnblog.com/30951311/examine-this-report-on-heng365