Synonymous idioms that have been studied and thought about

Cut, help each other; The idiom "sharpening" is used to describe the exchange of ideas. Hone-hone, learn from each other's strengths: making swords must be quenched and sharpened; Discipline and admonition. Grinding and carving-refers to grinding and learning. The same as "grinding, soaking and irrigation". Learn from each other: learn from each other. Discuss with each other: temper and admonish. Proverbs and regulations-Proverbs and regulations are metaphors of hard training, unremitting efforts and correcting shortcomings. Grinding immersion irrigation-learning immersion. Criticize each other. Refers to learning and thinking. Grinding and exciting-learn from each other's strengths. Describe efforts, repeated discussions, repeated discussions. Deliberate-a metaphor for discussing with each other when studying or studying problems. Grinding and cutting-grinding