于善庆,字伯祥,道号洞真子,以其严谨的修行和卓越的道教学术成就,被尊称为道教的主要人物之一。他的生平充满了对知识的渴求与追求,他不仅通晓经史,还深入研究了全真教的精髓。在大定二十二年(1182年),他投身于马丹阳门下,并在其去世后,受到刘处玄、王处一等名士青睐,被派往寻访丘处机。经过多年的修行和学习,于善庆 eventually became one of the most influential figures in the history of Chinese Taoism, known for his wisdom and his contributions to the development of Taoist thought.