Compared with subject knowledge counseling, PEC pays more attention to the counseling of children's learning methods, learning attitudes, learning efficiency and learning habits. Compared with ordinary family education, PEC understands children better than parents and is easier to communicate with children. Compared with school education, PEC pays more attention to students' individualization, differentiation and all-round growth, and provides one-on-one fine service for each student, which is a very necessary and beneficial supplement to ordinary school education and subject knowledge training.