Qiu Chuji as painted by Guo Xu, 1503
Qiu Chuji (traditional Chinese: 丘處機; simplified Chinese: 丘处机; pinyin: Qiū Chǔjī; 1148 – 23 July 1227), also known by his Taoist name Changchun zi (Chinese: 長春子; pinyin: Chángchūnzi), was a Daoist disciple of Wang Chongyang. He was the most famous among the Seven True Daoists of the North. He was the founder of the Dragon Gate sect of Taoism attracting the largest following in the streams of traditions flowing from the sects of the disciples.
Source;"Guo Xu album dated 1503 (4)" by Guo Xu (1456–c.1529) - Telling Images of China (exhibit). Dublin: Chester Beatty Library.(direct link). Licensed under Public Domain via Commons - https://commons.wikimedia.org/wiki/File:Guo_Xu_album_dated_1503_(4).jpg#/media/File:Guo_Xu_album_dated_1503_(4).jpg