One day an old man is on his way home. Just then a stranger (陌生人) stops him and asks, "Excuse me, how long will it take to walk to the next village?"

The old man looks at the stranger but he doesn't answer. The stranger says to himself, "This old man can't hear me clearly. I will ask him again. " Then he asks the old man loudly. The old man thinks for a while, but he still doesn't answer.

At this time, this stranger is very angry and shouts at the old man, "How long will it take me to walk to the next village?" But the old man doesn't give him any answer. So the stranger begins to walk quickly to the village.

The old man calls after him, "My friend, it will take you only fifteen minutes. " The stranger says, "Well, why do you tell me now?" The old man says, "How could I tell you just now? I don't know how fast you can walk. "