His son Zhang Heng (張衡) and grandson Zhang Lu inherited leadership of the movement and state. Also known as Celestial Master Zhang (張天師), Ancestral Celestial Master (祖天師) or ZhengyiZhenren (正一真人), Zhang is sometimes pictured riding on a tiger. In some Taoist sects, Zhang, along with Ge Xuan, Xu Xun (許遜) and Sa Shoujian (薩守堅), are called the "Four Celestial Masters" (四大天師).