In Shanghai, the traditional food on the fifteenth day of the first month (Lantern Festival) is mainly dumplings, also known as dumplings. Tangyuan is a round food made of glutinous rice flour, which contains sweet fillings, such as red bean paste, sesame seeds, peanuts, etc., and the outer layer is wrapped with glutinous rice flour, which is cooked and eaten. Tangyuan symbolizes reunion and happiness in China traditional culture, and its shape is round, which means family harmony and happiness.