The alkali noodles are mainly used to neutralize the excess acidity in traditional flour making, and this process is known as "speculation of alkali". The amount of alkali should be appropriate, too little is called "alkali small", then the noodles are dead and sour; too much is called "alkali big", then the bloom and the color is yellow. If you use active yeast to make noodles, you basically don't need to neutralize the alkali. Alkaline noodles in the boiling rice discretionary addition, can increase the viscosity, often drink on the stomach acid people have the benefit.