Infantile period is the fastest and most critical period to master language in one's life. Missed language development opportunities are hard to make up for.

2. Preschool language education can promote the development of children's cognitive ability.

Language plays an important role in people's cognitive process. Because before a baby can master a language, he must know the characteristics of an object and have a detailed perception of all parts and characteristics of the object one by one. When adults lead children to observe the world around them, impart knowledge and skills, and explain the rules of behavior, they will be accompanied by language. The participation of language will make a qualitative change in children's cognitive process.

3. Language education in preschool stage can lay a good foundation for learning written language.

Listening and speaking is the basis of reading and writing, and it is an important condition for a smooth transition to formal study after entering school. Before entering school, it will be easier for children to learn to read, write and read after entering school if they can learn the accurate pronunciation of Mandarin, master a large number of vocabulary and have certain oral expression skills.