In winter, the rolled dough will not go bad if it is sealed in the air with plastic. Separate the gluten from the dough. Gluten must be kept in the refrigerator. Dough can be stored at room temperature for 24 hours without plastic tape. Generally, it can be kept in vacuum for one week. After a few hours, the cold noodles will age and harden. It is suggested that some edible salt should be added in vacuum packaging, and the preservation time of cold rice noodles should be extended by vacuum packaging.