In honor of Zhang's achievements in science and engineering, his Buddy Cui Ziyu (Cui Yuan) wrote a memorial inscription on his burial stele, that has been preserved inside the Guwen yuan.[eight] Cui said, "[Zhang Heng's] mathematical computations exhausted (the riddles of) the heavens as well as earth. His inventions were https://heng36565320.acidblog.net/62855950/about-heng365