This year's Tomb-Sweeping Day coincides with the third day of the third lunar month. According to folklore, the third day of March is the birthday of the Queen Mother, and a flat peach party will be held on this day. In order to prevent flat peaches from attracting boys from all over the world, you must eat peaches and homophonic "escape" to escape this robbery. In addition, in the south, the third day of March is spring, and various infectious diseases and plagues are easy to spread. Therefore, southerners think that this day is unlucky, and people will hold activities such as flying kites on this day to take the meaning of "preventing bad luck".
Tomb-Sweeping Day eats canned peaches. I think this is just a psychological suggestion that people are seeking good luck and avoiding disaster. It doesn't make any sense at all, and it doesn't matter if they don't eat.