Commentary: The Suiyuan menu reads: "Lu is the Minister of Communications ... The cake in Yangzhou Store is called Yunsi Cake, which is white as snow, rouge as flower, red as peach blossom, and the filling is slightly sugary, but light and elegant."

Expansion: The square cake is an authentic Han local snacks. The skin is made of glutinous rice. Take a bite, it's sweet and waxy, the filling is just right, it's not sticky at all. Yangzhou square cake is one of the Chinese cakes in Yangzhou, Jiangsu Province, which is sweet, soft and waxy.