Qinglong Laodoufu: Laodoufu is a typical dish of Qinhuangdao specialties. The complex routine of the food consists of hours of soy beans soaked in water, grinding into juice, boiling juice, and chemical reaction by putting brine drop by drop into the boiled juice. It is different from another kind of Doufu mixed with plaster. Laodoufu is not only tender and smooth but also fragrant with the original taste and flavor of soy beans. Its endless remaining taste and nutrition serve as herbal cuisine.