Preface to Lanting Collection has all the elements of calligraphy as a work of art in terms of calligrapher and calligraphy, content and form. Under the ideological and cultural background of metaphysics in Wei and Jin Dynasties, scholars' comments, people who like algae, and the collapse of Confucian classics in Han Dynasty, Preface to Lanting, as the "best running script in the world", completely got rid of the pseudo-artistic position that calligraphy attached to words and served for decoration for thousands of years, and became a classic expressing personality, poetic feelings and humanistic value choices.