Autumn is a season that transitions from hot to cold, with high early and late temperatures, dry weather, cold and cold, when people are the most prone to cold and relatively weak resistance. Therefore, more food should be eaten in the autumn that enhances body immunity, is light and venom. Not only is the old duck nutritious, but it is one of the most desirable animal foods around mid-fall and autumn because of its perennial life in the water, its sexual aberration, its fertilisation, the fever of wasteful labour, its rejuvenation and its effect on the stomach. The old duck stew is better served by the addition of sauerkraut, lush, sauerkraut and soup, which can be spleened and wet and promote appetite。