Thus, an infiltration that lasted for more than ten years began to slowly grow in the prison.

One day after Hu Qiyi became an adult.

"Old Hu, your leg hurts again?" Officer Wang, who was in charge of logistics at the prison, frowned as he watched Hu Erliu holding onto the wall, dragging his stiff right leg, and limping into the tool room.

Arthritis becomes more serious in the humid prison environment, especially on rainy days. My knees swell like steamed buns and are extremely painful.

Hu Erliu forced a wry smile: "It's an old problem, it's nothing serious."

"How can this be possible? The warehouse roof is leaking, and there are a lot of labor protection workers waiting to be moved! If the distribution is delayed, the higher-ups will blame us..."

Secretary Wang caught a glimpse of his pained expression and changed the subject, "How about...let your kid take over for a few days? I think he's quite capable. He delivered things for you a few times before, and he's familiar with the in and out registration. We've been together for so many years, and his character is trustworthy!"

Hu Erliu's heart skipped a beat.

Let Qiyi go to jail in his place? He instinctively wanted to refuse.

His son's cold eyes and those terrifying actions flashed through his mind.

But a sharp pain came from his knee, causing him to gasp in pain.

Looking at Secretary Wang's expression, which refused to allow for negotiation, he opened his mouth but ultimately uttered only one word: "...Okay."

At first, I just occasionally delivered a lunch box or handed over a tool.

Hu Qiyi, wearing old work clothes that had been washed white, followed his father silently in and out of the heavy iron gate of the prison.

He has an excellent memory and can understand the tedious registration process at a glance. He can even remember the duty schedule of prison guards in different areas.

He seldom spoke, but observed everything with his overly quiet eyes: the patrol routes, the gaps between shift changes, the location of the warehouse, and even the small window in the infirmary that was always ajar.

The prison guards gradually got used to this taciturn and efficient "Old Hu's son", and checking the old work badge with the blurred name "Hu Erliu" printed on it that he handed over became a formality.

No one noticed that when Hu Qiyi pushed the cleaning cart equipped with brooms and buckets and slowly crossed the empty exercise yard, his eyes would linger for a long time on the small windows with iron bars on the high walls like cold probes.

Especially in those high-ranking prisons and solitary confinement cells, the people living behind the most mysterious and deepest ventilation windows often attracted his attention like a magnet every day.

He is no longer just curious about everything like he was when he was a child.

Instead, there is a sense of superiority in walking freely outside the shadows.

The ridicule and suppression of ordinary prisoners could no longer satisfy his distorted worldview.

So he was more eager to get closer to those high-level prison areas and solitary confinement buildings, and often asked to switch shifts with his father so that he could take his father's place in these areas.

He not only pried into the privacy of high-level prisoners, but also used his "privileges" to gain unprecedented pleasure every time he came into contact with those prisoners.

As he grew older, his hatred for his father Hu Erliu grew like a leech in his bones.

By this time he had grown up, and his hatred for women also grew with his age, filling his heart all day long.

So one day at the Chemical Engineering School, he was caught stealing underwear from a female classmate and reported to the teacher. Not only was he expelled from school, but he was also registered on the list of "unstable elements" by the local police station and was required to report every two weeks to receive ideological education.

Therefore, his inner irritability and hatred grew even more, but he could not vent these emotions.

Finally one day, when he was returning home, he suddenly found a letter and two hundred yuan on the table at home.

The letter asked him to go to a place immediately.

Two hundred yuan was a godsend for Hu Qiyi, who had experienced the ups and downs of life and had never received a salary, so he immediately rushed to the agreed location.

There, he met a man.

The man gave him 20,000 yuan and asked him to use Hu Qiyi's own advantages to enter the prison and complete the poisoning of Shen Yujing.

After the success, there will be another reward, which is no less than 20,000 yuan.

So Hu Qiyi, who was under great emotional pressure and had nowhere to vent, readily agreed.

The 24th, the night before the rainstorm.

The sky was low, and the entire Yanjing City was in a state of high pressure, with the air being stuffy and humid.

In the tool shed, Hu Erliu held his aching knee, cold sweat dripping down his forehead. He endured the pain and returned to the city to get medicine.

Hu Qi, who had been waiting for this opportunity, carefully prepared a table of delicious food and treated his father to a generous meal and a drink.

During the dinner, Hu Erliu, who was drunk and using alcohol to mask the pain, did not notice that there was a little inconspicuous white powder at the bottom of his wine glass - it was the sleeping pills that his son had carefully calculated the dosage of.

"Dad, drink a few more sips to cover the injury, and it won't hurt so much!" Hu Qiyi's voice was unusually calm, even with a hint of deliberate concern.

Hu Erliu was in so much pain that his eyes went black. He took the last glass of wine handed to him by his son without any preparation and drank it in a few gulps.

The alcohol brought a brief warmth, followed by a deeper dizziness.

He fell asleep in a daze.

But his son Hu Qiyi quickly put on his patched old work clothes that smelled of sweat and engine oil early the next morning, picked up his work badge hanging on the wall, and took a last look at the brown paper bag on the table with the words "Red Star Fertilizer Factory" printed on it, which contained gray-black powder.

"Where... are you going..." Hu Erliu's voice was unclear, half awake and half asleep. His eyelids drooped heavily, and he didn't know what time it was or where he was.

Hu Qiyi didn't respond, but carefully put a tattered cotton jacket on his father, then lowered the brim of his hat, closed the door, and rode his father's bicycle all the way to the prison early.

The work badge flashed before the eyes of the prison guard on duty, and the name "Hu Erliu" was signed in the registration book by a steady and unfamiliar hand.

He quickly came to his father's dormitory, took the zinc phosphide rat poison that he had hinted to his father to bring, pushed the familiar cleaning cart, opened the door of the tool room, and came to the outside of the solitary confinement building with his equipment.

All day long, he was as obedient as a tireless tool.

Even for meals, he never went to the cafeteria, but only ate the cold steamed buns he brought with him in the dormitory.

It wasn't until after noon that the sky began to turn gray as if it had been crying.

A rainstorm was coming, and he used the last bit of time, like a shadow about to merge into the rainy night.

He came to the prison area with familiarity. In the corner, zinc phosphide rat poison was piled casually behind a few sacks.

The corners of his mouth curled up in a cold arc.

He took out the paper bag with "Red Star Fertilizer Factory" printed on it from his pocket, which contained his "work" of higher purity that he had personally synthesized.

When I twisted the powder between my fingertips, it emitted a subtle metallic luster in the dim light, different from the crude rat poison made in prison.

He even added a bit of ammonium vanadate, a catalyst unique to fertilizer plants.

Hu Qiyi pushed the cart to the depths of the west district.

The ventilation window in Shen Yujing's cell, which was nearly two and a half meters above the ground, was still wet from the humidity even the day before.

The pressure difference here is terrifyingly high.

Everything was as perfect as I had planned hundreds of times.

Hu Qiyi stopped the car and looked around.

He quickly pulled out a special long-handled brush from the bottom of the cleaning cart, with a small funnel tied to the top of the brush.

He carefully poured the powder from the paper bag into the funnel.

A thin stream of gray-black water poured down silently, landing precisely in the depression on the inside of the narrow windowsill.

Just as he pulled back the brush, a tiny, grayish-white powder crystal unexpectedly stuck to the folds of his rough cuffs.

Another grain fell from the edge of the funnel and mixed silently into the mud beside the rut.

After doing all this, he took out a rough, ceramic imitation prison guard button with sharp edges from his pocket. It was the button he had torn off from his father's work clothes in advance, and gently threw it into the wet grass under the window.

The purpose was simply to frame the father who had been used as a tool all these years.

He pushed the cart and disappeared into the dull evening as silently as he had come, like a ghost that had never appeared.

When he got off work, he returned home as usual and his father was still sleeping.

He hung his work badge back on his father's collar, took off his sweaty old work clothes, and changed into his own clothes.

The gray-white crystal stuck in the folds of his sleeves fell off quietly when he changed his clothes and rolled into the shadow of the corner filled with debris.

Everything started to go according to plan.

Hu Erliu woke up at night and felt that he had drunk too much last night. He was drowsy and was helped to fall asleep by Hu Qiyi.

The next day, the 25th, Hu Erliu was woken up by his son and hurried to work.

It was also on the afternoon of that day that a torrential rainstorm that had been brewing for two days finally fell as Hu Qiyi had predicted.

Raindrops began to fall, the shadow of the sentry box became blurred, and the patrolling prison guards hid in some corner to avoid the rain.

The rain quickly wet the powder that had been hidden outside Shen Yujing's air window. Phosphine (PH), a highly toxic gas with a garlicky smell that was imperceptible to the naked eye, began to be released quietly. Its specific gravity was greater than that of air, and it diffused heavily downwards.

Outside the window, thunder rumbled.

Inside the cell, deadly poison gas was silently filling every inch of air above Shen Yujing's bed.

In the evening, Shen Yujing's poison took effect, shocking Yanjing.

Hu Qiyi stood by the window, looking towards Qincheng Prison, rain dripping down his hair.

There was no expression on his face, only a twisted and cold fire of calm burning deep in his eyes.

Deep in the flames, he reflected his mother's swollen body, his father's cowardly fists, He Caili's mean face... and all the people he thought should pay for his mother's death.

Shen Yujing is just the beginning of the list.

He saw his own fate in this carefully planned poisoning, so he braved the rain to rush to the place where the murder was once planned, hoping to find the person who gave him the large sum of money. However, he found that the place was deserted and just a desolate corner that no one cared about...

"Hahahaha! Wonderful, wonderful! Li Xiangnan, really wonderful! You have such an imagination, it would be a shame if you didn't write a novel, hahaha!"

When the last word fell from Li Xiangnan's mouth, Hu Qiyi let out a deafening and arrogant laugh. The look in his eyes when he looked at Li Xiangnan was full of ridicule, complacency and unscrupulous contempt.

Li Xiangnan smoked a cigarette and looked at Hu Qiyi with cold eyes.

"Do you really think you did it perfectly? Do you really think I have no evidence to convict you?"

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