The main material of the dumplings is glutinous rice flour, and glutinous rice flour is generally more sticky, with cold water in the pot easily lead to dumplings can not be well cohesive together, so that the inside of the filling exposed, boiling water in the pot can be very good to help condense the dumplings of the surface layer of glutinous rice, and can be very fast to cook the dumplings, so cooking dumplings is generally recommended to use boiling water in the pot.