Oil hydrocyclone has been in Jinan for more than 0/00 years. The earliest shop in Jinan that operated oil presses was Fengjilou in the light years of Qing Dynasty. Yuan Wensheng Restaurant, which was opened in the 20th year of Guangxu, is called Quancheng because of its numerous local snacks. The oil swirl produced in this restaurant uses Zhangqiu green onions to make noodles. After the scallion is cooked, it has rich fragrance, distinct layers, crisp outside and tender inside, which has long been praised by eaters and widely imitated by the catering industry.

Jufengde Hotel, which opened in the 1940s, took over this snack and improved it, adding horseshoe oil vortex and egg butter vortex. Not long ago, an old gentleman who came to Taiwan Province Province from Jinan in his early years went back to visit relatives. The first thing he wants to do is to taste the oil press in old Jinan.

Old Jinan people are very particular about eating oil swirl, mostly while it is hot, or with rice noodles or wonton, which has a special flavor.