For an infant, there is nothing more meaningful in the first year of life than the production of the first meaningful word. Although it seems to wait until the infant is 10-13 months old for it to appear in the form of a “sudden appearance”. In fact, a lot of “preparation” for articulation has already been done before that (0-12 months). This period of preparation is usually called the pre-language period. It is divided into: ① The phonation stage (0-2 months), which mainly consists of crying, coughing, hiccups, etc.; ② The Cooing&Gooing stage (2-4 months), in which infants start to explore various sounds and the diversity of sounds increases; ③ The Vocal play stage (4-6 months), in which some vowel-like sounds appear. play stage, where some vowel-like sounds emerge; ④ >6 months babbling or jargon stage; the babbling stage is also an important stage for acquiring consonant development. Sounds in this period can often be heard with phonological syllable structure, correct placement and method of vowel (rhyme) and consonant (vowel) constructions, correct articulation of vowel-consonant sound lengths, etc., so that these sounds already sound very close to their native speech.