There are "Tianshi" images of Zhang Daoling and his grandson "Xujing Tianshi" in Tianshi Cave. Two kilometers northward from the Fukuokang Palace to the Qingcheng Subjective - Tianshidong. Tianshidong was built in Daye period of Sui Dynasty, surrounded by mountains on three sides, facing the stream on one side, with ancient trees towering in the sky and quiet in the past. Existing palaces were built in the late Qing Dynasty, with magnificent scale, fine carving, and many precious cultural relics and ancient trees. Legend has it that in the late Eastern Han Dynasty, Zhang Daoling preached scriptures here. The main hall of Guannei is the "Sanqing Palace" and behind it are the Huangdi Temple and the Tianshi Cave. There is a small hall in the lower right corner of Tianshidong, named the Three Imperial Palaces. There are Xuanyuan, Fuxi and Shennong stone statues in it. There is an ancient ginkgo tree in front of the cave gate. It is said that it was planted by Zhang Tianshi. Its age has reached more than 1800 years.