Why do you want to eat peach buns for your birthday? What is history?

According to legend, Sun Bin/Kloc-left his hometown at the age of 0/8 and went thousands of miles away to learn the art of war from Guiguzi. He has been away for 12 years. On the fifth day of May that year, it suddenly occurred to Bin Sun that today was his mother's birthday, and the old mother was 80 years old, looking forward to her son coming home every day. I haven't seen you for 0/2 years. I wonder how my mother is. In addition, at Sun Bin's home, there will be a grand banquet for my mother's birthday. The old mother saw that there was only one Sun Bin missing from the whole family, and she began to cry sadly. Just as the family was comforting their mother, Bin Sun came back. Sun Bin was very sad when she saw her mother's haggard face, because she missed her son. He quickly took the peach out of his arms and handed it to his mother. He said, "Today, when I come back from leave, my master will give me a peach to honor you." After seeing Sun Bin's mother eat peaches, she became healthy and young. Following Sun Bin's example, they gave birthday peaches to their parents' birthdays, even those of ordinary relatives and friends, to show their hearts.