The Eastern Tang Dynasty began in Rugao. According to the Records of Chongchuan Literature in Gengyin Year of Daoguang in Qing Dynasty, "Dong Tang made it for Dong Xiaowan, the concubine of the Nester. When I didn't return to the nest, I sent this candy from Qinhuai to the nest, so I have been posting Dong sugar since Qin. "

Wu Ming, Mao Bijiang and Dong Xiaowan retired from Rugao Water Painting Garden. Celebrities at home and abroad often gather in the garden, singing poems and drinking. Dong Xiaowan is also good at making candy. When she was in Qinhuai, she used sesame seeds, fried noodles, caramel, pine nuts, peach kernels and sesame oil as raw materials to make crisp candy and cut it into cubes with a length of five points, a width of three points and a thickness of one point. This crisp candy is yellow outside and crisp inside, sweet but not greasy. People call it "East Tang". Now the famous scenic spots in Yangzhou are full of fragrant winter candy (also called inch golden winter candy) and winter candy.

Shuiminglou brand winter candy produced by Rugao Food Factory inherits the traditional technology and is made of the above white sugar, pure caramel, shelled sesame and so on. Crisp and sweet, pure in taste, and fragrant in teeth and cheeks. 1985 was awarded the quality product certificate of Jiangsu province. At present, the sales volume reaches hundreds of thousands of boxes.