Why doesn't the fried dumpling skin bulge?

Dead face. Dumpling skins are made of dead noodles and will not swell when fried. The fried side may swell a little because of the sudden increase in temperature, but the other side will not. Dead noodles are generally in areas where pasta is the staple food, and unfermented noodles are called dead noodles. On the contrary, the corresponding dough is fermented noodles, cooked pasta is generally dead noodles, and there are other dead noodles such as cakes and steamed dumplings.