On the inner walls of the main hall of the Grinding Needle Well, there are eight murals preserved, with a simple and elegant style and a distinct folk flavor. The mural depicts the entire process of Zhenwu's cultivation, including Zhenwu, the crown prince of Jingle Kingdom, leaving Wudang, the black tiger patrolling the mountain, the crow leading the way, the monkey presenting peaches, the deer carrying flowers, the grandmother guiding and grinding the needle, the Five Dragons holding the sage, Qiongtai being enfered, and the defense of Wudang. With rich imagination and creativity, it is a rare category of cultural relics on Wudang Mountain.