It was early one morning in a certain month. By the side of a road in a small village, a baby girl, wrapped in a quilt, lies in the grass, first wailing and then sobbing incessantly. After a while, an older man passed by. He waited for a long time, and when he saw that no one came looking for the child, he took her home ...... From then on, she called him grandfather and he named her Nui Nui. That year, he was 54 years old and the girl was 1 year old. Sixteen years have passed. He has become a 70 year old man. The old man is thin and withered, but he walks with a whirring wind; and the girl is a 17-year-old high school student, standing tall and excelling in her studies. When he was young, his family's composition was not good, which delayed his life's work. He had a skill - he made good pancakes that were as thin as cicada wings and crispy. He woke up at 4am every morning, every day, in spring, summer, autumn and winter, rain or shine. With the addition of a baby girl to the family, he was so happy that he wouldn't take a moment to relax. He often has a pancake in his hand and hums a little song in his mouth. The song could be heard in half the village. He earned about 800 yuan a month from his pancake stall, which was not much, but he was content. At the beginning of each month, he would give more than half of it to his daughter, who lived at school, to cover her living expenses. "Girl, you can spend the money you get from grandpa, he can earn it!" He laughed. "Grandpa, you should sleep more in the morning, don't always get up so early." She said. She saw how hard he worked: grinding the batter, setting up the griddle, holding the firewood, spreading the pancakes one by one, stacking them one by one, and riding the tricycle to the market 20 kilometres away to sell them. In the past two years, my grandfather's back has become more and more bent. Whenever it rained or was cloudy, there was always a vague pain. Grandpa didn't think so. He was happy. He was happy to make pancakes, but even happier to sell them. Whenever he sold the money, the first thing he did was to go to the market for a couple of rounds, just to buy his daughter a beautiful hairpin, a flowery dress, white shoes and delicious food ...... Nui Nui is a child who knows what she is doing. She knows everything at her grandfather's place. She doesn't complain at all; she feels that having Grandpa in her life is enough. Other than that, she never asks and never thinks about it. Nui Nui gets good grades and always stays in the top three of her grade, from first grade to her current senior year. She lives at school but comes home once a week, rain or shine - she misses her grandfather and the pancakes he cooks. When she returns to school on Sundays, she always brings back some pancakes. She never spent more money and ate mainly pancakes at school, rarely eating rice or steamed buns; she thought the pancakes she brought were better. Of course, she would go to the canteen and order a cheap vegetarian dish to go with it. She also liked the pickled fish and sweet and sour pork from the canteen, but she only went to get them at noon every Saturday. Yes, she had to go home on Saturday afternoons and she would buy them to eat with her grandfather. "Grandpa, Grandpa, I've brought home good food." She was smiling brightly and innocently at this time. She knew her grandfather; he was willing to spend money on everything for her, except for himself, so stingy that he never refused to eat meat when he was not at home. She always saved a large portion of the 500 yuan a month she spent on living expenses. In the summer, she buys her grandfather sweat-absorbing T-shirts and trousers, and hats to protect him from the sun; in winter, she buys him cotton clothes and trousers, thick gloves, soy milk powder, or rheumatic pain cream, and so on. Over the years, 17-year-old Nui Nui could not understand one question. The school canteen offers a wide variety of meals, but why does she prefer to eat the pancakes that her grandfather spreads ...... Over the years, the 70-year-old has always wondered about one thing. He is not young anymore, but why he is so happy every day and his body