"Cold food" as the name implies, people in the north must eat "cold food" wherever there is cold food, that is, they must eat cold food, that is, people can't make a fire to cook on this day, but eat cold food that has already been prepared, but it is delicious even if it is cold. There are differences between the north and the south in terms of solar terms and holiday eating customs. Northerners generally eat "jujube cake", also called "pushing cake". In some places in the north, fermented grains are used to make dough and steamed with dates. They are also used to making jujube cakes into swallows, stringing them with wicker and hanging them on the door, and eating them cold to commemorate the noble quality of mesons in promoting fame and fortune. Cake is a grain, and adding dates to the grain conforms to the purpose of preserving health and sweetening in spring, which can increase the function of spleen and limit the excessive publicity of liver qi.