Cowhide candy, known as "a must in Yangzhou", is a specialty of Yangzhou. It tastes sweet, the sesame seeds on the outer layer are even, the cut surface is brown and shiny, translucent, elastic, delicious, chewy and not sticky, and enjoys a high reputation at home and abroad. It was introduced to Yangzhou as early as the dry and fine years of the Qing Dynasty, but it was lost to the world because of frequent wars. The scientific and technical personnel and sugar technicians of Yangzhou food manufacturers are determined to make the long-lost cowhide candy see the light of day again, and excavate and sort out the sugar-making technology of predecessors. Through thousands of attempts, the traditional products are finally re-produced, and they are innovated on the basis of maintaining the original characteristics, so that the taste reaches the best state of elasticity, toughness and softness.