On the third day of the third lunar month, Chinese people have the custom of eating local dishes and boiling eggs. Shepherd's shepherd's purse, also known as ground vegetable and field vegetable, is a kind of wild vegetable growing in the corner of the field. Although it is a wild vegetable, it is delicious and nutritious. The folk proverb says, "On March 3rd, shepherd's purse is a panacea." "On March 3rd, shepherd's purse boiled eggs." Spring is the season to eat shepherd's purse. Eating shepherd's purse in spring is also a long-standing traditional custom among Chinese people. "The Book of Songs" has a chant of "it is as sweet as water"; Xin Qiji also has a poem that "peaches and plums in the city are worried about the wind and rain, and spring is in the head of the stream."

Ye Tiaoyuan's "Hankou Zhuzhi Ci" in the Qing Dynasty said: "Three or three orders emphasize the kitchen, and the taste is new. Rice dishes and eggs are cooked, which is very full and very fragrant. " The rice dish in the word refers to shepherd's purse Ground vegetables are not only nutritious, but also can treat many diseases. It is not only a dish of delicacies, but also a panacea. "Shepherd's purse, alias to vegetables, nursing grass, chicken heart vegetables, its roots, flowers, seeds can be used as medicine. In traditional Chinese medicine, shepherd's purse has a wide range of medicinal values and is known as "licorice in vegetables".

Traditional Chinese medicine believes that shepherd's purse is sweet in taste and cool in nature, and belongs to liver, spleen and kidney meridians, which has the effects of harmonizing spleen, promoting diuresis, stopping bleeding and improving eyesight. There are many ways to eat shepherd's purse, which can be mixed, fried and stewed, and can also be used as stuffing or soup. All of them are attractive in color and delicious, and they are a delicious vegetable with the same origin of medicine and food. Boiling eggs with shepherd's purse is the most common way to eat in Hunan. On the third day of March, shepherd's purse will have long stems and flowers, and women will pick them and put them in their hair.

Because the homonym of shepherd's purse is "amassing wealth", according to folklore, on the third day of March, at the time of ancestor worship, with the help of ancestors' gods and wealth, people will wash fresh shepherd's purse and bundle it into a small bundle, add eggs, red dates, balloons, and two or three slices of ginger to cook a big pot, and the whole family will eat a bowl and eat it. It is said that rheumatism can be removed, fire can be cleared away, waist and legs are not painful, and spring plague can also be prevented.