Secondly, children aged 3-4 are still in the critical or sensitive period of language development, and their Chinese thinking is not so strong that it is not easy to form the phenomenon of "Chinese crutches", that is, all foreign language content must be translated in Chinese, and English learning should also begin at this time. With the growth of age, it is beneficial to establish English thinking directly in children's brains, form English programmed memory and improve their practical language application ability.
In addition, there is a great advantage that 3-year-old children usually don't reject English. There are many cartoons and books suitable for early childhood. Language is simple and repetitive, which conforms to the cognitive law of language and children's cognitive development. Children can grow up in supporting cartoons and books. In contrast, children over 5 years old will start to reject too simple content because of their strong Chinese ability, and learning a second foreign language needs to start from the basics, which is easy to produce resistance.
To sum up, it is very necessary for children in early childhood to learn English. If they miss this excellent enlightenment stage, they will have to work harder later to catch up with such an ideal learning state.