Chinese Writer, Poet, Taoist Philosopher, Musician, Alchemist of the Three Kingdoms Period, one of the Seven Sages of the Bamboo Grove, Anti-politics Theorist

: Sometimes referred to as Xi Kang, courtesy name Shuye (??, "shu" means the 3rd son of the family, "ye" means night), was a Chinese writer, poet, Daoist philosopher, musician and alchemist of the Three Kingdoms period. He was one of the Seven Sages of the Bamboo Grove who held aloof from the dangerous politics of third-century China to devote themselves to art and refinement. (From: Wikipedia.org.)

"A History of Mathematics," by Uta C. Merzbach and Carl B. Boyer, Third Edition, John Wiley & Sons, 2011.