First of all, mix high-gluten flour with water, knead it into dough, put it in water to wash out gluten, steam the washed gluten in a steamer, and pour the washed flour slurry into the flour and stir it evenly. Filter the thick batter. Brush a layer of oil on the steaming tray and pour the filtered batter evenly. Put it in the oven and finally take out the cold rice noodles.