What is the origin of blindness?

There was a joke in ancient China. It is said that a Chu man saw a note in a book that "mantis catches cicada, yellowbird is behind", saying that mantis can't see yellowbird because he hides behind a leaf. The Chu people think that all this is the magical effect of this leaf. So he looks for this leaf every day. One day, he finally saw the interesting story of "mantis catches cicada, yellowbird is behind", and there is a leaf in front of yellowbird. He took the leaf home, held it in front of him and asked his wife, "Madam, have you seen me?" Of course, the wife could see it, so she said, "Yes, how could she not see it?" He didn't believe it, covered it and asked again. His wife was impatient. She said, "I can't see anything." The Chu people said happily, "This is the truth."

The next morning, he came to some stalls one by one, covered them with the leaves and got something to eat. Small stall owners think he is a fool and don't care about him. This made him think that the stall owner could not see him and jumped for joy. Later, I came to a cloth shop, carried a piece of cloth and left. The shopkeeper reached for him and said, "How can you take my cloth?" He was surprised and said, "What, you can see me?"

Of course it's a joke.

But in Shennongjia, Hubei, there is really a magical plant that can hinder the purpose, just grass, not leaves.

Shennongjia Mountain in Hubei Province is continuous and undulating. Old trees cover the sky in the dense forest, and poisonous haze covers it all the year round. Because it is one of the lucky surviving areas in the Quaternary Glacier and a national first-class nature reserve, there are many strange flowers and plants growing here, and there are many strange things.

1987, a writer named Jiao Guangqi came to Shennongjia to experience life. He asked a local hunter named Park Yongping to take him into the mountain, hoping to see for himself how hunters hunt animals. Park Yongping is a middle-aged man in his forties. He is short and stocky and looks older than his actual age. He agreed to Jiao Guangqi's request and said, "You can watch hunting, but you must hide it, or it will be terrible for tigers, wolves and poisonous insects to hurt you." Jiao Guangqi will do anything as long as he is willing to take him up the mountain to watch hunting.

Early the next morning, Jiao Guangqi put on a camouflage suit and went up the mountain with Park Yongping to a place frequented by wild animals. Park Yongping put some grass juice on him, picked a downwind place for him to hide, and then gave him a grass in his hand.

Jiao Guangqi saw that he was smeared with grass juice and gave it to the grass. He felt that a man with three thick bosses was holding a grass in his hand, like a three-year-old baby. He couldn't help asking, "What are you doing? What's the use of this grass? "

Park Yongping said with a smile, "I'll tell you after hunting, or you won't believe me now." Then he took out the same grass and put it on his belt. He stood in the middle of an animal path with a shotgun in his hand, quietly waiting for the beast to appear.

After a while, the grass rustled and a muntjac slowly came out. This is a very alert and timid animal, and it will run away at the slightest sign. I saw it sticking out its neck and pricking up its ears. Now it clearly saw Park Yongping standing in the middle of the road with a shotgun, and he was out of the limelight, but he walked towards him step by step with his eyes wide open, as if he didn't see it. Even Park Yong-ping raised his gun and sent it directly to the muzzle. Only 5 meters away from the hunter, Park Yongping shot it in the chest. At this time, the muntjac realized that there was a hunter, so he jumped up and turned and ran away. But less than 30 meters, he fell.

Then, Park Yongping went hunting in the same way, such as rabbits and pheasants. Strangely, these little animals, like Huang Ji, turned a blind eye to Park Yongping and died at gunpoint.

They were preparing to go home after finishing the game when suddenly a leopard weighing about 100 kg came from a distance. Leopards are notoriously fierce, brave and flying carnivores, and even the mountain king tigers have to avoid it for three points. This rare leopard is very hungry. When he saw a pool of muntjac blood on the ground, he ate it "beep, beep" and his eyes kept scanning around.

At this time, the writer Jiao Guangqi turned pale with fear, his legs trembled, and then he fainted. Park Yongping was not nervous at all. He squatted beside Jiao Guangqi casually. He just pulled out the grass inserted at his waist and waved it in front of him. The leopard ate the muntjac blood, licked its mouth and slowly left. After the leopard left, Park Yongping woke Jiao Guangqi, who took a long breath and said, "Why, we were not eaten by the leopard." Park Yongping fiddled with the grass in his hand and said, "This kind of grass can make people invisible to wild animals. But it can still be seen between people. " Jiao Guangqi opened his eyes wide in surprise, looked around with grass in his hand and said, "Isn't this the same as the invisible grass in ancient books?" But why can this grass hide people from animals? "PiaoYongPing smiled and said," I don't know. Anyway, people here have long known that this grass can make wild animals invisible. As for why, no one can tell. " Jiao Guangqi asked again, "So this kind of grass must be very rare?" Park Yongping said, "It's rare to say. It is found in this place all over the country. It can't be planted anywhere but here. "Let's just say it's ordinary. Many plants are planted in front of and behind every house here. In this way, wild animals will not attack villages because they have no villages in their eyes. " Jiao Guangqi nodded and said to himself, "magic, really magic grass."