Qiu Chuji (10 February 1148– 21 August 1227), courtesy name Tongmi (通密), also known by his Taoist name Master Changchun, was a renowned Taoist master from late Southern Song/Jin dynasty and a famous disciple of Wang Chongyang, the founder of Quanzhen School. He is known for being invited by Genghis Khan to a personal meeting near the Hindu Kush, who also respected and honored him as an Immortal. Qiu was one of the Seven True Daoists of the North. He was the founder of the Dragon Gate sect of Taoism attracting a following in the streams of traditions flowing from the sects of the disciples. Source: Wikipedia (en)