What was the name of the Daoist monk who advised Genghis Khan?

The Daoist monk who advised Genghis Khan was Qiu Chuji, also known by his religious name Master Changchun. Born in 1148, Qiu became one of the leading masters of the Quanzhen school of Daoism and later founded its influential Longmen branch.

Genghis Khan invited him in 1219 after hearing of his reputation for wisdom, spiritual cultivation, and longevity practices. Qiu Chuji began his journey from northern China in 1220 and traveled across Mongolia and Central Asia, eventually reaching Genghis Khan's camp near the Hindu Kush in 1222.

The khan reportedly hoped that the Daoist master might know a secret for achieving immortality. Qiu answered honestly that no such medicine existed, but he advised Genghis Khan on moderation, self-discipline, and ruling his people. Their conversations were recorded by Qiu's disciple Li Zhichang in an important travel account. Qiu later returned to China, where Genghis Khan granted him authority over Daoist institutions in northern China.