Capon, commonly known as cooked chicken, line chicken, vermicelli chicken, sliced chicken, chicken sacrifice, antithesis chicken and eunuch chicken, is a kind of cock whose testicles have been surgically removed. The act or process of removing the male testicles of a rooster is also called castration. Capon has a history of more than 3000 years in southern China, and Italy, France, Turkey, the United States, Canada and other countries and regions have the habit of raising and eating capon.

Covering chickens is an ancient undertaking. The direct explanation is to make the cock grow faster, the meat is tender and the cock's testicles are cut off. In the south, capons are also called pheasants or pheasants. Dai Song Fugu's poem "On the way to Xu Jie" said: "Divide ducks into chickens." There is a line in the song of Yuan Tang-style "Dong Qing Pastoral Le Jia": "A chicken grows fat, a sheep gives birth to a lamb, and a cocoon becomes a cocoon", which is a castrated rooster.

Rooster is very aggressive and active before castration, and often consumes the feed it feeds quickly, so the cost of raising chickens remains high and the meat quality is poor. Castrated chickens will greatly change their temperament and can even take care of chickens instead of hens. In April and May every year, when the farmer's cock changes into bright feathers, capuchin monkeys will be active in rural or township markets. Castrate the rooster for the farmers. These capons are capons.