1. Birthday cakes. Cake is a must-have, especially for children and young people. If you are an elderly person, you should also buy it, because this thing is already common. Whether they like it or not is a matter of course. That's one thing, whether it's a formality or not is another matter.

2. Eat longevity noodles. longevity noodles are noodles, and there are many kinds. There is a saying for this, because long noodles can symbolize longevity. Some restaurants will give away longevity noodles. Eating longevity noodles can be traced back to the Western Han Dynasty. Emperor Wu of the Han Dynasty once celebrated his birthday. The imperial chef made a table of noodles. Emperor Wu of the Han Dynasty was very unhappy and thought to himself: "I am the emperor, why should I eat such worthless noodles on my birthday?" So he asked everyone: "The Book of Physics says that if a person's philtrum is long, his lifespan will be long. If his philtrum is 1 inch long, he can live to be 100 years old. Is that so?" At this time, Dongfang Shuo continued: "I'm not Laugh at Your Majesty, but laugh at Peng Zu. If a person lives for 100 years, his philtrum is 1 inch long. If Peng Zu lives for 800 years, his philtrum is only 8 inches long. How long is his face? If he wants to live longer, he must have a longer face! It is impossible, but you can think of a flexible way to express your wish for longevity. A long face means a long face. The imperial chef used long noodles to wish the emperor a long life. " Emperor Wu listened to Houlong! Yan Dayue, so eating noodles on birthdays slowly became a custom.

3. Eating eggs. In some places, people have the custom of eating eggs on their birthdays, and they need to roll them several times on their bodies, which is called the "roller disaster". There is also an allusion to why we eat eggs. It comes from "The Black Bird of Destiny descended and gave birth to Shang" in "The Book of Songs·Ode to Shang·Xuanniao". It tells the story of a woman named Jian Di who encountered a swallow egg when she went out in ancient times. After eating it, "Qi", the later ancestor of the Yin and Shang Dynasty, was born. The people hoped that their children would be as talented as "Qi", so they began to give each other swallow eggs to express their blessings to the children. Over time, eggs were used instead. I ate a must-eat food on my birthday.