The custom of "eating eggs on the summer solstice" has a long history. As the saying goes: "If you eat eggs on the summer solstice, it will not be summer in hot weather." According to legend, from the day of the summer solstice, the weather is sunny and warm, and it is getting hotter. Many people, especially children, will feel tired and weak, and their appetite will decrease and they will gradually lose weight. This is called "summer". Nu Wa Niangniang told the people that every year on the day of the summer solstice, children hang boiled eggs on their chests to avoid "summer". Therefore, the custom of "eating eggs on the summer solstice" has continued until now.

The human body consumes a lot in summer, so we should pay attention to supplementing nutrients. As the saying goes, "long summer eats eggs, but stones can be crushed", which means that people who eat eggs are particularly energetic. Egg white is a high-quality protein, and egg yolk is rich in lecithin. Eggs are very good nutritious food. On the summer solstice, people put eggs in the leftover "seven teas" and cook them to become "tea eggs". Later, people improved the cooking method and added fennel, gravy, cinnamon and Jiang Mo to Qijia Tea. Since then, tea eggs have become one of the traditional snacks in China instead of season and climate food in long summer.