修炼

(of Taoists) to practice austerities / to practice asceticism

to decorate / to embellish / to repair / to build / to write / to cultivate / to study / to take (a class)

variant of 修[xiu1]

to refine / to smelt

variant of 鏈|链[lian4], chain / variant of 煉|炼[lian4]

lit. to practice austerities to become a Daoist immortal / practice makes perfect