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Tianying sweet potato noodle is famous for its long-cooked, fragrant and delicious style. It has various eating methods. It is a kind of food material with sweet potato as raw material and made by the starch in sweet potato. The vermicelli is rich in carbohydrates, dietary fiber, protein, niacin, calcium, magnesium, iron, potassium, phosphorus, sodium and other minerals. The vermicelli has good flavour adhering feature, which can absorb the flavour of all sorts of delicious soup bases, plus the vermicelli's own soft and smooth characteristics, making it more refreshing and pleasant. It is true green vermicelli with most of the health functions of sweet potatoes.