March 3rd is the traditional festival "Tomb-Sweeping Day" in China, also known as "Cold Food Festival". According to traditional customs, people eat eggs on this day in Tomb-Sweeping Day. There are several reasons for this custom. First of all, Tomb-Sweeping Day is a day to worship ancestors and sweep graves. People will go to the graves of their ancestors to worship and wash. Eggs have rich symbolic meanings in China culture, representing life and new hope. Eating eggs can express your thoughts and prayers for your deceased relatives, and place your admiration and nostalgia for your ancestors. Secondly, the Cold Food Festival is also a farming culture festival, which is related to famine. According to legend, in the Cold Food Festival of an ancient year, the world was hungry and the people were hungry and cold, but they could not make a fire to cook. Finally, some people proposed to use eggs to keep warm and chicken feathers and dung to make a fire, which finally solved the problem of food and clothing. Since then, people eat eggs at the Cold Food Festival to commemorate this history and thank chickens for their help. To sum up, eating eggs on March 3rd is due to the traditional customs of Tomb-Sweeping Day and Cold Food Festival, which is not only a memory and blessing for ancestors, but also a commemoration and gratitude for historical events.