Once upon a time, Confucius once with two runner to travel. One day, three people go hungry, found a shop front, near a look, there is a sign, saying "authentic osmanthus tangyuan, a penny a". Confucius one pocket, found that only a penny. The feeling be nasty under, let student to take out the pen and in the character "one" and add a vertical, into a "penny ten". Then the teacher and pupil three people into the store for ten dumplings. Confucius and other three people eat, take out a penny for the boss, turned out into, the boss hurriedly out of the door for money. Confucius said, pointing to signs: "plain code marks a price, a penny ten!" . The boss was speechless. Confucius when he left, on the boss's shoulder, say with smile: "old today or polite to you, otherwise, the old yet again in the above plus one, into a" authentic osmanthus tangyuan, penny thousand "!" .