Regarding children's education: the fundamental principle of learning is self-study, not tutoring; the fundamental principle of self-study is induction and summarization, not wasting time; the fundamental principle of summarization is self-output, not mechanical copying; the fundamental principle of output is expression and reconstruction, not simple repetition; the fundamental principle of expression is logic, not form; the fundamental principle of logic is understanding, not templates; the fundamental principle of understanding is practice, not stopping at theory.