Shi Yang in Song Dynasty liked studying very much. At noon on a snowy day, he and his classmates went to the philosopher Cheng Yi for advice. Teacher Cheng is taking a nap, and they are waiting outside the door. The snow is getting heavier and heavier. In order not to disturb the teacher, I still wait patiently outside the door. The teacher woke up. Found Shi Yang two people standing in the snow, busy call them into the house, Shi Yang hurriedly salute to the teacher, ask. Confucius was a famous thinker and educator in ancient China. He is knowledgeable, but never complacent. When he was traveling around the world, on his way to the State of Jin, he met a seven-year-old child who blocked the way and asked him to answer two questions before giving way. One is: Why do geese bark loudly? Confucius said: Goose has a long neck, so it cries loudly. The child said: The frog's neck is very short, why is it loud? Confucius was speechless. He is ashamed to tell his students that I am not as good as him, and he can be my teacher!