According to legend, during the Spring and Autumn Period and the Warring States Period, Wu Zixu helped He Lv seize the throne of the State of Wu, and helped him to make the country prosperous and the people safe throughout the year. But later, He Lv was full of ambition and ordered Wu Zixu to build "He Lv City" to show his merits. After the completion of the city wall, the king of Wu held a feast to celebrate. During the dinner, the ministers indulged in drinking and having fun, thinking that with a strong city, they could rest easy. See these, China's prime minister Wu Zixu is very worried. He told his entourage: "The civil and military officials in the Qing Dynasty now believe that high walls can keep the state of Wu at peace. ..... get carried away, it will lead to disaster. If anything happens to me, Wu is trapped and food and grass are scarce, you can go to Xiangmen City to dig three feet to get food. "

Soon, He Lv, the king of Wu, died, and Fu Cha succeeded to the throne, listening to slanderers. Wu Zixu urged the King of Wu to refuse the peace of Gou Jian, the King of Yue, but he was rejected and was sentenced to death. After Wu Zixu committed suicide, Gou Jian, the King of Yue, sent troops to attack the State of Wu, surrounded Gusu City, the capital of the State of Wu, and Wu Jun was trapped in the city, with women and children crying in the streets. At this time, the waiter remembered Wu Zixu's previous instructions, and quickly called the neighbors to dig food outside Xiangmen. When he dug three feet deep under the city wall, he found that the city brick was made of glutinous rice flour. People were so excited that they knelt down to the wall and thanked Wu Zixu.

Suzhou people admire Wu Zixu's patriotism and love for the people. Since then, every winter, they will prepare rice cakes to show their memory of Wu Zixu and share them with friends and family during the Spring Festival. Therefore, the shape of Suzhou rice cake is similar to that of city bricks, which is not greasy after cooking, does not crack after drying, and does not go bad for a long time.