Tell me the contents of the book.

The cleverest animal next to man is the wolf.

An old hunter, by the honey-thick bonfire in Daxing 'anling, said to me. Hunters are a dying profession. He stopped hunting and became a ranger.

It was when I was young ... The old hunter stood up and seemed to regain his courage.

What if the wolf crosses the river with the little wolf? If there is only one wolf, it will hold it in its mouth. If there are several, only one of them was worried about what would happen to the "child" who stayed on the shore when he was swimming in the river, so he killed an animal, burst his stomach, and then firmly bit its pedicle with his teeth, making it swell like a raft. It carried all its cubs, and the family crossed the river with the help of the buoyancy of the lifebuoy.

Once, I chased a female wolf with two cubs. She can't run fast because the wolf's feet don't work. The distance between me and the wolf gradually shortened, and the mother wolf turned and climbed to a huge sand dune. I'm surprised. Usually, when wolves are in danger, they will circle in the dense vegetation and use the complex terrain to wait for an opportunity to escape. If they climb to the sand dunes, although wolves climb faster and seem to take advantage of people, once people climb to the top of the mountain, they will have a clear vision and the wolves will never run again.

This is a strange wolf. Maybe it has lost its mind. I thought like this and climbed up the high sand dune step by step. Sure enough, it is obvious that the wolf is running away quickly in the distance. I went down the mountain to chase, and suddenly I found the little wolf missing. At that time, I didn't think much, and I tried my best to chase it down. That is the fastest wolf I have ever seen in my life. I don't know where it came from, like a black arrow stuck in the ground. I didn't kill it until the sun went down. I was so tired that I almost vomited blood.

I skinned the wolf and walked back with a gun pointed. Walking and thinking, what an incredible wolf. Why is it so taboo? Where did those two little wolves go? I'm going home soon, so I decided to go back to that dune. It's nearly midnight and it's extremely cold. In the pale moonlight, the sand dunes are like a silver grave, and there is no movement. I don't think it's really necessary. It's just a stupid wolf. I was about to leave when I suddenly saw a hidden depression, like a white candle, rising two strands of smoke.

I ran over and saw a pile of dried camel dung, from which white gas came out. I gently lifted the camel dung and saw two little wolves that had disappeared during the day, panting evenly under the warm camel dung. There are traces of the wolf's tail sweeping gently on the ground, and the work is very clever. During the day, it actually escaped the eyes of an old hunter like me.

In order to protect her cubs, the female wolf first delayed my speed by climbing the mountain, won the time to hide the children, calmly stroked the traces with her tail, and tried her best to run in the opposite direction in exchange for the survival of the children.