The building is about 6 meters high and is divided into three parts: the building seat, the building body and the roof. This building is a stone carving with lotus flowers. This building is carved from white marble and stands on the Yang Lian Building. It is an octagonal cylinder with a height of 4.29 meters and a diameter of 90 centimeters, and the width of each side varies from 40 to 42 centimeters. In block letters, the Daodejing of Emperor Xuanyuan was inscribed by SHEN WOO, the Emperor of Kaiyuan in the Tang Dynasty, on December 12th, the 20th year of Kaiyuan. Other aspects are engraved with the 8 1 chapter of Laozi's Tao Te Ching. At the end of the topic, Yizhou secretariat and Lai Wenjun sent envoys to admire the fields, and the country took Zijin fish bags and ordered them to be built in Wuyin on October 8, the 26th year of Kaiyuan. The following are officials carved in past dynasties, mostly from Jiaqing to Xuantongyuan in Qing Dynasty. On the building, there is a lotus treasure cover with a flat top, which seems to be caused by a broken roof. It is 38 cm high and has a roof shape and an octagon shape. It is carved with a huge blue stone, with ridges, tiles, eaves, eaves and rafters, and a bucket arch under the corner beam. Simple shape, elegant and beautiful. Yixian Moral Classic Building is the best preserved and largest moral classic building in China. In the 26th year of Tang Kaiyuan (738), it was erected in Kaiyuan Temple in the west of Yizhou, and moved to longxing temple in the 5th year of Southern Song Dynasty (1 169). The scripture of this building was carved according to Li Longji's annotation to Xuanzong in the 21st year of Tang Kaiyuan (733), and it was China's proofreading of Laozi's Tao Te Ching. Classic Biography, written by Su Lingzhi, a calligrapher in Tang Dynasty, is an important material for studying the art of calligraphy in Tang Dynasty. The octagonal roof provides an example for the study of Tang Dynasty architecture. ?