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① Assimilation: Incorporate environmental factors into existing diagrams and make them part of one's own cognitive structure. ②Adapt: ​​Change the original schema to adapt to the environment. 3. Piaget's stage theory of cognitive development ①Perceptual motor stage 0-2 object eternity ②Pre-operational stage 2-7 Self-centered, three-mountain experiment, irreversible thinking, and rigidity. ③Concrete operation stage 7-11 De-egocentric, reversible, able to simply think abstractly but need the support of concrete things. ④Formal operation stage 11-16 Close to adults, propositional reasoning, hypothetical deductive reasoning, analogical reasoning, flexible thinking. This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.