The rule of “being loose at first but tight towards the end” is ubiquitous in the organizational structure of Modern Chinese Mandarin in three aspects, namely, word-formation, syntax and discourse. At word-formation level, there are fewer prefixes and more suffixes, and prefixes attach less closely to roots than suffixes do. At the syntactic level, external arguments attach loosely to verbs, while internal arguments attach closely to verbs. At the discourse level, the clauses in the front position are often topical, loosely attached to the main clauses, while the clauses in the rear position are more closely attached to the main clauses. From the perspective of prosodic organization and speech interpretation, the first constituent is more independent, which is a natural law formed to make speech processing more convenient and faster. This law is also reflected in the syllable and text structure, manifesting isomorphic effect.