Meaning: Don't worry about small manners when doing big things, and don't worry about small blame when speaking big manners. Big banks: great achievements. Caution: small caution. Diligent: Not afraid. A small concession: a small humility. Source: Historical Records Xiang Yu Biography. Pei Gong has gone out and made Chen a surname Pei Gong. Pei Gong said, "What can I do if I leave today and don't retreat?" Fan Kuai said: "Big banks never hesitate to give small gifts regardless of details. Now man is a knife and I am a fish. Why should I resign? " So he went there and asked Sean to stay and thank him. After Pei Gong gave the Hongmen banquet, Wang Xiang sent a surname Chen Ping to call Pei Gong. Pei Gong said to Fan Kuai, "Now that I'm out, what should I do to leave?" Fan Kuai said: "You don't have to care about small etiquette when doing big things, and you don't have to pay attention to small humility when talking about big festivals. Now people are like knives and chopping boards, and we are like fish and meat. Why do you want to leave! " So a group of people left there and asked Sean to stay and apologize to Wang Xiang.