Ro-bun (luǒ mō) is pronounced in Xuzhou dialect, and is called single cake or pancake in other regions. As a kind of noodle food unique to Xuzhou, luǒ mō is said to have originated in the period of the Chu and Han Dynasties. In Northern Song Dynasty, when Zhao Li, the hero of Xuzhou, gathered people to fight against the Jin Dynasty, the local people made steamed buns and rolled them with deep-fried noodle cakes, which were sent to the heroes to eat. Therefore, the variety of steamed buns has been handed down to the present day and has not declined over the generations. In Xuzhou, there is a folk ballad: "The diameter of the round cake is a foot long, and the deep-fried noodle cake is yellow and crispy. The deep-fried noodle cake is soft on the outside and crispy on the inside, and it is sent to the heroes who fight against gold for a taste." During the reign of Shunzhi in the Qing Dynasty, Fang Wen, when he was living in Pengmen, wrote about Xuzhou's steamed buns in his "Journey to the North Road": "White flour is mixed with water and branded into cakes, while yellow corn and beans are cooked into porridge. The north is at least round-grained rice, the south only with the custom." From this can be seen, this kind of folk pastry food not only has a long history, and long famous.