You are a woodcutter, he is a shepherd, you chat with him for a day. On the surface, he found nothing, but if the story can be understand by another way. A woodcutter cut firewood in a mountain for many days, and wood in this mountain has been cut all over, he was afraid of other hills may not have the wood he wanted , He wants not to run a trip without harvest, but also can get a lot of wood. He needs to have enough information, so he chats with shepherd. Then, he knows which mountain has more firewood and good road. With sufficient information, he goes back to home with full of harvest the second day.
Before doing things, we need to know what they need, and be good at listening during exchange. Usually, other people's information could help ourselves, everyone has his value and advantage.