This dish has the functions of invigorating spleen, regulating stomach, benefiting qi and regulating middle warmer. Potatoes contain more starch, which people mistakenly think is a fat food, but it is a diet food. This is because there are only 1%-2% soluble sugar in the starch, which can provide calories for human body. 5 grams of potatoes are comparable to an apple weighing 2 grams. Calculated by 1 gram to 1 gram, its calories are lower than that of rice flour, which is recognized as a weight-loss food in the world.