Interpretation of thickness: preferential treatment, attention; Thin: neglect, contempt. Attach importance to or give preferential treatment to one party, despise or neglect the other. Metaphor treats people and things differently. Chu Ming Yuan Hongdao's "Guangzhuang Health Master": "I have raised it all my life, and it is not appropriate to favor one over the other." Comprehensive application of law; Be a predicate and an object