Dried silk is made of shredded tofu. Dried silk is often used as two kinds of dishes, namely boiled dried silk and scalded dried silk. Dried silk originated in Huaiyang area, which is a traditional local dish in Yangzhou and Huai 'an in Ming and Qing Dynasties. Now it is popular in Yangzhou, Taizhou and Dongtai, and belongs to Huaiyang cuisine.

Tofu is a kind of food with rich nutrition and a long history. The public's love for tofu has promoted the progress and development of tofu production technology. The main production process of tofu is pulping, that is, soybean is made into soybean milk; The second is solidification, that is, soybean milk solidifies into a gel containing a lot of water under the action of heat and coagulant, that is, tofu.