What works of Lu Xun did the word "cannibalism" come from?

It comes from Lu Xun's Diary of a Madman.

Diary of a Madman is the first short vernacular diary novel written by Lu Xun and the first modern vernacular novel written by China. The novel reveals the "cannibalism" essence of feudal ethics through the image of the persecuted "madman" and the self-described description of the "madman", and shows the author's resistance to China feudal culture with feudal ethics as the main connotation; It also shows the author's profound sense of repentance. work