It must be Jiaozi(dumplings), I think. it has two parts, crust and filling. The crust is made of flour and the filling depends on everyone's preference. For example, someone may mix meat with vegetables but someone may like pure meat in Jiaozi. We wrap the filling with the crust and then just put it into water and wait it to be boiled. We often eat dumplings at Chinese New Year. But you can eat it every day as long as you like it. Many busy people will take instant frozen dumplings as food when they have little time to cook. It is very convenient!