What is this thing?

_ _ is an ancient pasta, wrapped with stuffing.

Say it is "wonton". More common in poetry and prose in Song Dynasty.

Song Mengyuan's "Tokyo Menghua Road Restaurant": "There are noodles ... selling rice, purse, white rice and broken rice." Song and Wu's dream of selling all kinds of goods: "water pill, soup pill, _ _ son." Song Zhou Mi's "Eating Old Things in Wulin Market": "Quail _ _ son."

Shanman et al. Shandong Folk Daily Food: "Big Fish _ _ (jiaozi). Take fresh Spanish mackerel, slice the meat, chop it or cut it into stuffing, add a little salt, add a little leek and oil, wrap it in jiaozi, jiaozi is as big as a child's fist, and cook it. Only two pieces are served in each bowl, full of six or seven pieces, which is very rich. " .

Shi Naian's "Water Margin" for the first time: "Taiwei Fang _(cái," only stood up in the traditional way and said, "Shame on you! Kill the officer by surprise! Look at yourself, cold chestnuts are bigger than _ _. " A "cold chestnut".