Spades are a common bean food, and fresh beans are on the market every March/April. Fresh beans can cook directly or cook. Fresh beans, a vegetable of high nutritional value, are determined to contain protein 8.8 g, fat 0.4 g, carbohydrates 19.5 g per 100 g fresh beans, as well as dietary fibres, carrots, B vitamins, choline, phosphorus, vitamin C, which prevent dementia and are suitable for use by students and intellectual workers。