The existing problem of Yexie soft cake is short storage time. Ye Xie soft cake began in the first year of Wanli in Ming Dynasty (1573), and was founded by Shi Longmao. Yexie soft cake is a traditional famous food in Shanghai, which has five characteristics: soft, sweet, fragrant and fat. It tastes soft, sweet and not greasy, but it can't be stored for a long time for only three days. It is affordable and deeply loved by the masses.