张道陵
He is also known as Zhang Daoling (), Celestial Master Zhang (, "Zhāng tiānshī"), Ancestral Celestial Master (, "Zǔtiānshī") or Zhengyi Zhenren () to Taoists. Zhang is sometimes pictured riding on a tiger. In some Taoist sects, Zhang, along with Ge Xuan, Xu Xun () and Sa Shoujian (), are called the "Four Celestial Masters" ().