Introduction to the Fourth Patriarch Stele Pavilion: The main building in the front yard - the four ancestors Zhao, Xing, Jing, Xian and the four empresses' divine merit stele pavilions are arranged in a straight line in the order of Zhongda and Zuoda, which is very popular in China. It is unique among the imperial tombs. The stele pavilion is a mountain-style building with a glazed roof. The relief stone door has two dragons playing with beads vividly. The stone reliefs on the corner pillars on both sides of the door have dragons sitting on them. The dragon's head, scales and buttocks are sitting on the ground. One front paw is on the ground for support, and the other front paw is supporting it. The fire bead looks forward with its head raised, and its shape resembles a sitting dog. This may be intrinsically related to the Manchu totem worship of dogs. It is a very rare dragon shape in Chinese royal tombs.