Cut: learn from each other's strengths; Pro-training: admonition, admonition, admonition. Criticize each other and help each other.

The origin of the idiom: Zhou Liangxing in the Southern Dynasties thought thousands of words: "Make friends and score points, sharpen the rules."

Example of Idiom: Zhou Liangxing in the Southern Dynasties wrote "Thousand Characters": "Make friends and divide, sharpen the rules."

Synonym of cutting and grinding rules: cutting and grinding rules.

Idiom grammar: as predicate, object and attribute; help each other