A young man with glasses is writing at his desk while watching. Sometimes, he will stop to frown and think about something, and from time to time, he will help the glasses that have slipped from his nose. A girl with long shawl hair, at this time, there is no time to sort out her messy long hair. She just greedily scanned the book with her big eyes. From time to time, she shook Liu Haier to her forehead and looked at her expression. If she has scissors, she must cut Liu Haier. An old man with gray hair, presbyopic glasses on his nose, squinting his eyes, holding the book far away, looks very laborious, but still reluctant to put it down; Several children are prone on the table, pointing to words, reading word by word, with great difficulty, but with great concentration. ...