People always say that "hearing is false, seeing is believing", but the most deceptive organ in the human body is the eyes.

When we see something, the brain will combine the cognitive habits and experiences we have stored in our lives with such things to form a complete concept, which is almost a conditioned reflex processing process. To put it in layman's terms, the brain will take the incomplete picture we see and complete it according to our own cognition and experience. For example, if someone shows you a half-blocked drawing of the logo of an Apple phone, you will naturally "make up" the complete picture of the logo in your brain.

But in fact, when the obstruction is removed, there is nothing in the place that was originally blocked. Our eyes trick our brains into thinking that the picture is a complete apple logo.

In addition to this visual phenomenon, there is another visual phenomenon that we are most familiar with - the phenomenon of visual persistence. To put it simply, it is a qiē thing we see, its image can be retained on our retina for 0.1 to 0.4 seconds, the principle of film projection is based on this characteristic of the human eye, when a number of coherent pictures are continuously displayed in front of people's eyes in less than 0.4 seconds and longer than 0.1 seconds, then the picture that people see is "moving" Up, the most typical example is the dynamic picture used as an expression picture on the Internet in that life, each dynamic picture is made of many frames of similar and coherent pictures continuously played, and the first to apply this phenomenon to real life is the Chinese, such as the marquee.

So, what kind of effect will be produced if the visual "brain supplement" phenomenon and the visual persistence phenomenon are combined and applied?

No, rather, it is the visual persistence phenomenon that is used to produce the effect, and what is used to cover up this effect is the original picture of the visual brain supplementation phenomenon.

For example, the ink sprayed on the paper screen door of the clean room is full of romantic abstraction.

Yan Qi pulled down the bamboo curtain made of purple bamboo, after the purple bamboo becomes an adult, the bamboo body will change from emerald to purple black, in the clean room where the light is not strong, it is no different from black, each bamboo piece is about a finger wide, and there is a finger wide gap between the bamboo and the bamboo piece, when the bamboo curtain is pulled down, it blocks a part of the picture on the paper screen door, and the ink exposed between the gaps is integrated with the black bamboo body, reducing the resolution of the human eye to the scene seen, so it is like the apple logo that is blocked part of the picture, and the empiricism in the brain cognition begins to make up, and the part of the picture blocked by the bamboo piece is made up very quicklyand forms a complete and vivid picture in the brain.

So now, the picture that appears in the eyes of the Yan family's uncle and nephew is a black painting on a white background, a big snake.

The serpent straightened up its upper body, baring its fangs and Nobuko, and made a vicious attack.

Yan Qi raised his hand to lift the bamboo curtain, and the paper screen door without any obstruction was restored to a messy inkjet painting.

Inkjet painting, is to cover up the pattern of the big snake - the purpose is to make a snake shadow on the paper screen door - but not to be seen by people - so to use visual brain supplements, the use of bamboo curtains to block, so grandiose to put the props in front of everyone's eyes!

However, can only one snake shadow scare people into jumping off the pond regardless of it? Yan Qi pulled the bamboo curtain, and as the black bamboo pieces and blank gaps rolled staggered on the paper screen door, the shadow of the big snake actually moved like an animation, it swayed like a real snake, opened its mouth wide, and made a gesture to pounce in the direction where Yan Zike was standing!

Someone has made a careful deduction and design of the ink on the paper screen door, ta will form each frame of the animation of the picture overlapped together as a base map, covered with a bamboo curtain after fine smearing and trimming, the use of visual persistence phenomenon, whenever the bamboo curtain moves a unit of the gap area, the bamboo and the uncovered ink will form a frame in the human brain, each frame of the picture is coherent, with the continuous movement of the bamboo curtain will gradually present the picture on different frames on the paper screen door, so as to smoothly connect into an animation, when the bamboo curtain is pulled to make the occluded part and the blank part staggered on the base map to roll, the dynamic effect of the loop picture is generated, the more frames, the smoother the picture, that is, the finer the ink on the door of the paper screen, the more realistic the dynamic effect.

The ancients had never seen movies or animations, which were beyond common sense in this era, so when the light was not sufficient, at first glance, a snake-shaped black shadow appeared on the paper screen door, and it was still shaking realistically, and anyone would have the first reaction to think that there was a huge snake outside the door, and even wanted to break into the door very viciously.

What's more, before this, everyone's topic has been stuck in the fear of snakes, compared to the fear of snakes themselves, these girls are more afraid of irreparable damage because of snakes, and there is no hope of marrying from now on, helpless for the family, life and death dilemma, and a lifetime of torture.

And it was Cui Meilin who led up this topic and implanted the fear of snakes deep in everyone's hearts.

A big snake appeared at the door, and it was likely that it would break into the clean room in the next second, and under the psychological hint implanted in advance by Cui Meilin's statement that "a huge black snake was found while digging the pond", the first reaction that Miss He Er could make could only be to choose to escape from the door next to the pond- Miss He Er can swim, this is the clue that Qiao Lezi heard from Lord He when he investigated the evidence from everyone, since Miss He Er can swim, then she will definitely choose to jump off the pond, and then escape by swimming, as for the pants are not worn, it doesn't matter, it is too late to wear them after jumping into the water, even if they wear them after going ashore, it doesn't matter, it was already dark at that time, no one would notice this, and there was a skirt outside to cover it- It doesn't matter if you don't care about this, the most important thing is to save your life, not to be hurt by a snake, not to be left with a limb incomplete, not to be crippled for life, helpless and desolate.

So, what about the method of controlling the bamboo curtain to pull up and down to cause the rolling parallax effect?

Yan Zike said: "Use the door." ”

When the little maid who went to change the water opened the door next door, Miss He Er screamed in the clean room, this door is a push-pull type, as long as a strong line is tied to the door next door, and the other end is tied to the bamboo curtain, the bamboo curtain is pulled down in advance, and the position of the picture on the background paper screen can not be seen when the little maid pulls the door next door, the line pulls the bamboo curtain, and the bamboo curtain rolls up, causing a rolling effect at the same time, the bamboo curtain can be rolled up again, and the original state can be restored, such a technique is not difficult to do, as long as the line goes to the right line, you can eat hard, control the direction.

Yan Qi remembered that after Cui Meilin came out of the clean room, the next person to go in was Miss He Er, so Cui Meilin had plenty of time to set the pre-laid line to the starting position and pull down the bamboo curtain - if it was set in advance, it would definitely be seen by others in advance, so she had to ensure that after she came out of the clean room, the next person to enter was Miss He Er.

Yan Qi remembered Cousin Lin's words and deeds after returning to the tea room from the clean room, and she said to Miss He Er: "There is an incense burner on the floor of the clean room, your eyes are not good, be careful not to kick it." - Miss He Er's eyes are not good.

This is a language and psychological trick, as soon as she enters the door, she says this to Miss He Er, then others will subconsciously think that the next person to go to the toilet is Miss He Er, so no one will rush to go with Miss He Er, and Miss He Er will subconsciously have a kind of idea of being urged to "it's time for you to go to the toilet" when she hears Cousin Lin say this.

Even if there is really a person who is not long-sighted and has to rush with Miss He Er, I believe that Cui Meilin has already thought of a countermeasure, even if she goes back to the clean room again, it will only take seconds to complete the suspension of the mechanism that is ready to be activated, which will not be difficult for anyone.

Taking 10,000 steps back, this organ is not a murder organ, it is just a harmless facility that psychologically induces the target to take the initiative to throw itself into a place with murder weapons, even if it fails, Cui Meilin can use the prank as an excuse to cover it up, and it is a big deal to find another way to kill Miss He Er in the future, so even if this organ is exposed, it will not expose her terrible thoughts.

And Cui Meilin was the last to enter the clean room after the incident, when everyone gathered around the door of Linchi to find the whereabouts of Miss He Er, she could take the opportunity to break the line of the brake mechanism, and she didn't know it.

Yan Zike found an inconspicuous thread in the crack of the door between the clean room and the next door, which was exactly the same as the thread used to string the bamboo pieces together to form a bamboo curtain.

It can be said that in the past half an afternoon, the qiē topic and the qiē behavior that Cousin Lin said were all in the foreshadowing and finishing of this criminal method, whether it was psychologically, linguistically, visually, behaviorally, in the early stage of the foreshadowing, or in the details of each step, she designed it seamlessly and perfectly, if it weren't for the fact that there was such an era bug as Yan Qi among the people present, this murderous scam was afraid that it would really be accompanied by the death of Miss He Er and sink to the bottom of the pond forever.

However, no matter how cleverly designed this murder method is, there is one biggest flaw, that is, when the method is exposed, Cui Meilin cannot quibble and deny it no matter what. Because the evidence is in front of us, and it is no more obvious, such a bizarre and unprecedented technique for the ancients can never be the effect inadvertently caused by Cui Meilin or anyone, it must be deliberately set here, and the image of the big snake is combined with the topic that Cui Meilin told everyone, and even dull people can imagine the meaning and purpose of this.

Cousin Lin had no power to refute the evidence in front of her, and silently nodded and admitted the fact that she had committed intentional homicide.

Qiao Lezi felt very strange about Cui Meilin's intention to kill Miss He Er, although the Cui family's old lady Cui was an official family, but Cui Meilin's father's branch was just a civilian merchant, she was not qualified to enter the official women's school, let alone had the opportunity to meet Miss He Er, how did she form a grudge with her?

When the dust of the snake shadow murder incident settled, it was already two or three o'clock in the morning, the two young ladies Jiao Zhang and Wu Yue and Lu Lotus were allowed to leave after making the testimony transcript, and at this time they had already followed their respective families back to the house, Yan Qi and Cui Xi were left in the tea room, Mrs. Cui sent someone to call Cui Xi several times, Cui Xi only refused to leave, this time he had fallen asleep by the smoke cage, Yan Qi sat next to him, and he was napping for a while.

Hearing the sound of footsteps, Yan Qi opened his eyes and saw Cui Meilin walking in under the twist of the two officials, the tears on her face had not dried, but she pretended to be strong and smiled: "I heard that you saw through the mystery on the bamboo curtain and paper screen?"

Yan Qi stood up and nodded: "I want to know how you came up with such a technique." The knowledge involved in this technique is really not as good as what a person of Cui Meilin's age can imagine, unless it is the principle that she discovered by mistake.

"I can't sue you for this," Cui Meilin smiled, sadness appeared in her eyes again, "Fortunately, I have achieved my goal...... Even if you die, you have no regrets. ”

"Why did you want to kill her?" Yan Qi was not without curiosity, she might not have asked under other circumstances, but this time it was different, the reason was still the killing method.

"I have a younger brother," Cui Meilin's eyes showed tears, although she had been crying until her eyes were dry, but at this time, when she mentioned her younger brother, tears still quickly overflowed her eyes, "My mother went early, and my father continued the strings, so it is inevitable that I will be negligent about my sister and brother, it can be said that my sister and brother have grown up dependent on each other since childhood." My younger brother is very kind and kind to everyone, but the strange thing is that he likes to raise snakes with such a temperament. His thoughts are also funny, he said, the snake's body is always so cold, it must be because of the lack of pain and love, everyone thinks it is ugly, and refuses to approach it, its heart is cold, and its body is getting colder and colder, I give it some warmth, and it may not use its vicious appearance to protect itself anymore.

In fact, he simply likes to raise snakes, but this does not mean that he is a dark and cold-blooded person, he just likes it, just like a girl likes rabbits, kittens and puppies. He would often go to the wild to catch some non-poisonous small snakes and raise them, and those small snakes would be tame and obedient by him, and even the people in my family were afraid of snakes under his influence.

But on that day, he went up the mountain to look for snakes as usual, and met He Er, who was engaged in the activities of the Herb Society in the mountains, He Er and other members of the Herb Society went up the mountain to collect medicine, and after entering the mountain, they scattered to pick their own, and then He Er unfortunately encountered a poisonous snake.

She quickly took control of the poisonous snake and drove him away from the scene, but He Er-He thought that the snake was deliberately used by her brother to scare her, because the snake listened to him very much, and she didn't even ask! There were rocks everywhere, there were steep slopes everywhere, and the younger brother was pushed down by her, hitting his head on the tip of the stone, and his brain burst on the spot!

Cui Meilin trembled, even if she had really killed Miss He Er, there was still endless hatred that could not be vented at this moment. Seeing that Yan Qimu didn't say anything, Cui Meilin couldn't help laughing, and deliberately asked her with a little contempt: "I heard that you seem to have a younger brother too, if it were you, what would you do?"

"I'm not going to do that like you. "Yan Qidao.

"Huh. Cui Meilin sneered, and before she could speak, she heard Yan Qi continue: "I will personally chop the other party alive with 36,000 knives, I will not let the other party die so happily." ”

Cui Meilin was stunned for a moment, then laughed, with tears in her laughter: "You're right, I let her die too happily, so that I still don't feel enough to relieve my hatred! It's a pity, it's a pity that I can't think of a better way to kill her, I don't want to be discovered so soon, I still want to live for a few more years, at least to help my brother find a kind-hearted person who can raise snakes and treat snakes as friends like him, so that the snakes he raised can be handed over...... So I can only try to deceive people by covering myself up in this way, so that I can get away with my guilt as long as possible, but it's a pity, it's a pity...... Do you have snakes?"

Yan Qi shook his head desperately, and tried to divert the topic: "The black snake you are talking about, is it that he raised?"

"Yes, the snake is not venomous, and it has a gentle personality, and I quietly took it and threw it into the pit that was being dug while people were unprepared, and then made up this lie. Cui Meilin smiled lightly.

"How can you guarantee that the Cui family will be willing to rebuild Yinghongxuan by you?" Yan Qi asked.

The old lady was soft-hearted, and quite believed in the gods and ghosts, knowing that her brother had just passed away, so she taught the family to be happy by me. ”

"You bought the goddess?"

"It was my mother who married a dung-carrying mother-in-law on Zhuangzi, and her brother saved her son's life, and she was willing to do whatever she wanted, and she would never give me up. Cui Meilin lowered her voice, the yacha behind her couldn't hear what she was saying at all, in fact, if it weren't for Yan Qi being Yan Zike's niece, they wouldn't have allowed Cui Meilin to talk to her for so long.

"What about the people who sharpened the bamboo?" Yan Qi asked again.

"The people of Cui's house are not good at construction, so the craftsmen can only find short-term workers from outside, and the person who is responsible for cutting the bamboo and inserting it into the pond is the son of the woman who was ordered by me to blend in with the craftsmen. Cui Meilin smiled sadly, "His life was saved by his brother, but now his brother is no longer alive, sometimes I would rather he not be so kind, if it weren't for his kindness to save He Er, he wouldn't have died because of this...... In this world, why are there always no good recompenses for well-meaning people?"

Yan Qi couldn't answer this, because she had also asked like this, and if she couldn't answer it, she had to go her own way, she didn't need to find a correct standard for her three views, whoever was good to her, she would be good to whom, even if the other party was a heinous scumbag. No one in this world will be good to you for no reason and no return, and people who are good to you unconditionally must be cherished.

What if the standards for judging right and wrong, good and evil in this world collapse?

What I like, no matter how bad it is, is incomparably good, and what I don't like, no matter how good, has nothing to do with me.