Source: "Historical Records of Xiang Yu": "Today's Xiangzhuang sword dance, its meaning is often in Pei Gong." Xiang Zhuang danced a sword during the dinner in an attempt to assassinate Liu Bang. Metaphor refers to the real intention of speaking and doing things.
"Artificial knife (Z incarnation), I am a fish" means that the power of life and death is in the hands of others, and I am in a position of being slaughtered.
This idiom is quoted from Historical Records of Xiang Yu. Fan Kuai said, "Big banks don't care about details, but they don't hesitate to give small gifts. Now man is a knife and I am a fish. Why should I resign? " Later it evolved into the idiom "I am a fish."