It is Mianshan Mountain in Jiexiu City, Shanxi, a fairyland on earth. You can hardly image that in the autumn over 2,600 years ago, the land was a sea of fire, and a big fire burnt seven days and seven nights. The raging flames illuminated the Yellow River 100 miles away, and all the birds and animals fled in all directions. It was Lord Wen of the state of Jin who set fire to the mountain. He took this action not for drilling the army, nor for going hunting, but for looking for a person. It was a pursuit involving human life. Who was the person they looked for? Why did they adopt this unusual method?