What are the thinking characteristics of preschool children in the pre-operation stage of psychology?

When children learn a language until they are about 2 to 7 years old, the pre-operation stage is called. At this stage, children develop symbolic representation schema through language, imitation, imagination, symbolic games and symbolic painting. Their knowledge still depends largely on their own perception. At this stage, children have the thinking characteristics of expressive thinking and the ability to use symbols. Their intellectual activities are at the level of representation, and their thinking is irreversible and self-centered.

Children's imagery thinking is controlled by the reflection result frame of the right brain and the summary of the reflection result, and the thinking at this time stays on the surface of things. At this stage, children's intelligence is still in the superficial stage, and there is no in-depth understanding, but the training of thinking ability is a purposeful, planned and systematic educational activity, and the acquired education and training have a profound impact on children's thinking ability.