Ключевые слова: 2529 years, 67 years, 89 years, arms raised, beijing, boys, brown hair, casual clothing, childhood, china, chinese ethnicity, classroom, color image, education, elementary school, elementary student, enjoyment, excitement, focus on foreground, four people, girls, globe, guidance, holding, in front of, indoors, intelligence, knowledge, learning, looking, over the shoulder view, photography, physical geography, pointing, school uniform, schoolboy, schoolgirl, showing, sitting, solution, some under 18, standing, table, teacher, teaching, togetherness, trust, vertical, young women,