Starting from the covert scope and based on the important syntactic structure in Chinese, this book explores the hidden and potential factors and features of syntactic structure in terms of quantity and its syntactic functions. It systematically describes the semantic meanings and restrictive functions of syntax in the following fields: Double-Quantitative Construction, Verb Reduplication Construction, lian-Construction, Existential Sentence, Sentence Showing Object of Result, "V + 个 + VP" Construction, Syntactic Reduplication Construction, Coordinate Construction, "又A又B" Construction and Symmetrical Construction.