Eating red bean glutinous rice in Jiangnan water town, there is a custom that the whole family get together to eat red bean glutinous rice on the night of winter solstice. There is an interesting rumor about its origin! According to legend, there was a man named Gong. His son was incompetent and evil. He died on the Winter Solstice. Become a plague ghost after death and continue to harm the people. However, this epidemic ghost is most afraid of red beans, so people cook red bean rice from winter solstice to drive away the epidemic ghost and prevent diseases.

The custom of eating glutinous rice peas, duck eggs and weighing people in the long summer is spread all over the Central Plains, which is said to be related to the story of Zhuge Liang's capture of Meng Huo. During the heyday of Shu and Han Dynasties in the Three Kingdoms, the jurisdiction was as far away as central Yunnan, but some ethnic leaders were not completely convinced, and Meng Huo, the leader of Yi nationality in Jianning (now Qujing, Yunnan), was one of the outstanding figures.

After the death of Liu Bei's Baidi City, Zhuge Liang was ordered to entrust orphans and assist the young master. Repeated surprising moves, seven escapes and seven escapes, subdued the unruly Meng Huo, and forced him to bow to the young Emperor Shu Han and Mr. Zhuge. Later Zhuge Liang became seriously ill. When he was dying, he specially called Meng Huo and told him face to face: "Although I am dead, my young master A Dou is still here. You should visit him at least once a year today. " It was a long summer season, and Meng Huo was a straightforward person. Once he says yes, he will do it. From then on, he went to Chengdu every summer to visit Liu Chan, the master of Shu. A few years later, Sima Yan, Emperor Wu of Jin Dynasty, destroyed Shu and brought Adou to Luoyang. Meng Huo didn't forget Zhuge Liang's instructions. Every summer, he still took his personal guard to visit Adou in Luoyang. This person is careless, for fear that Adou will be abused. Every time, he used a big weight to weigh Adou himself, and repeatedly told Emperor Wu of Song that if there were any mistakes, he would never allow them. Seeing that he was so earnest and knew that Adou liked sticky and sweet food, Emperor Wu came up with an idea. Every summer, he ordered people to cook peas and glutinous rice for him early. At this time, new peas are on the market, sweet and fragrant, and the rice is delicious. Adou must eat at least two bowls. When Meng Huo arrived, they were all several kilograms heavier than the previous year. No wonder A Dou wants to be "happy here".

Since then, the custom of cooking peas and glutinous rice in long summer and weighing people has spread among the people and become a custom.