Ji Wang Huai Ren's Preface to the Holy Teaching has a profound historical and humanistic background, that is, the thought of worshipping the king in the early Tang Dynasty and the top-down calligraphy style in the Tang Dynasty, which played a very important role in the prosperity of Buddhism in the Tang Dynasty. Huairen collected Wang Xizhi's Mo Bao, which was combined and arranged by borrowing, enlarging and reducing. The inscription has the characteristics of many words, many fonts and high level of inscription. It is an important carrier for studying Wang Xizhi's calligraphy in the existing inscriptions, and it has also become a model for future generations to learn from Wang Zi.