Who was Liu Shuliang, a scholar in the early Yuan Dynasty?

A famous Taoist priest, writer and calligrapher in the Northern Song Dynasty.

Liu Shuliang, courtesy name Xiyi and nickname Yuanchu, was born in Yuxian County, Henan Province. He was a famous Taoist priest, writer and calligrapher in the Northern Song Dynasty. When Liu Shuliang was young, he traveled to famous mountains and rivers, studied Taoism with his teachers, and extensively studied Taoist, Buddhist, Confucian and other classics.

Liu Shuliang originated the theory of inner alchemy in the Yuan Dynasty, advocating inner cultivation of gods and external practice of benevolence and righteousness, advocating the idea of ????moral world and self-cultivation.