This is Xu's treatise on Chinese calligraphy, both as an art form and as a tradition. In it, he asserts that a calligrapher should be careful about choosing the right style to follow since there are numerous theories and stylistic schools down the ages. The calligraphy is executed in running script and shows a confident flow and balance overall, with a suggestion of the influence of ancient stele inscriptions and seal script in the individual brushstrokes.