What is the origin of rice cakes?

The rice cake originated from the State of Wu.

After the death of Wu Zixu, the doctor of the State of Wu, the State of Yue took the opportunity to attack Wu, and the people of Wu were hungry and cold, so they secretly tore down the city wall and dug up the ground, only to find that the city foundation was made of glutinous rice, and then the people used glutinous rice bricks as food, which was the early rice cake. Later, in order to thank Wu Zixu, people made rice cakes to offer sacrifices to Wu Zixu during the Chinese New Year.

There are three colors of rice cakes: red, yellow and white, which symbolize gold and silver. The rice cake is also called "rice cake", which is homophonic with "getting taller every year", meaning that children are getting taller every year. Therefore, there is a poem by predecessors called rice cake: the meaning of rice cake is a bit deep, as white as silver and as yellow as gold. I look forward to getting old and making high profits. I sincerely hope that the money will come.