That year, he was 8 years old and she was 7 years old. They met on the beach by the sea. The boy was so elegant. The girl ran to the boy with a blushing face. He was quietly building a castle. The girl seemed to be disturbed by her arrival. She frowned, turned around and patted the sand. When she was about to leave, she said, "Will you marry me when you grow up?" The girl shouted at the boy's back. The girl smiles like a flower, the wind gently blows the girl's white gauze skirt, and the warm sun shines softly on the boy's back, and the picture is frozen forever.