One of the annotation systems of ancient books, which originated in the Southern and Northern Dynasties, aims to clarify the meaning of original books and old annotations. Expounding the thought of the original book, or collecting materials, evaluating the old notes and supplementing the treatment based on syndrome differentiation. For example, On Semantic Sparseness written by Liang in the Southern Dynasties was the only semantic sparse work in the Southern and Northern Dynasties. It died in the Southern Song Dynasty and was introduced from Japan in the Qing Dynasty. It belongs to one of the annotation styles of ancient books, and others include biography, annotation, writing, meaning, interpretation and meaning.