Xiaogan cooks eggs and cauliflower on the third day of the third lunar month. What is the reason?

In the spring of March 3, shepherd's purse is a panacea. Every household has the custom of boiling eggs with shepherd's purse on the third day of the third lunar month. Legend has it that this custom has several origins. The most concentrated statement is that according to legend, Hua Tuo, a famous doctor, encountered heavy rain one day while collecting herbs and took shelter in an old man's house. Seeing that the old man had a headache, he picked a handful of shepherd's purse and told him to cook eggs with shepherd's purse. The old man recovered after eating three eggs. There is also a saying that the third day of the third lunar month is the day when the Han people welcome the souls of their ancestors. They eat eggs to commemorate their ancestors, hoping to get some aura. The practice is very particular. The first is to choose shepherd's purse.