Inside the dark cave.
All eyes were fixed on Li Aiguo.
Isn't it just an ordinary stone?
Why go to so much trouble to get it down from the top of the cave.
"Captain Cai Fangshun, you often drill holes, come and take a look." Li Aiguo smiled and handed the stone over.
Company Commander Cai Fangshun took the rock and flashed it with a flashlight, and he knew the origin of the rock.
"The appearance is dark green, and the joints are mostly pentagonal. This is a piece of basalt."
"wrong!"
The beam of light swept across the side, and little bits of dark gray light flickered.
Cai Fangshun's expression became solemn, and he stretched out his finger to press on the rock.
The fingers were covered with dark gray particles.
"Rock ash that is not basalt."
He put his fingers to his nose and smelled it, and his expression suddenly changed.
"Magnesium powder, this is magnesium powder!"
"As the saying goes, 'If you want to make good iron, you must first make good slag.' When steelmaking plants smelt special steel for rail tracks, they will add magnesium powder to the steelmaking furnace to improve the properties of the slag."
"When I visited Anshan Iron and Steel on behalf of the Railway Corps, I saw steel workers playing with magnesium powder."
Magnesium powder plays a large role in industry and is a controlled material. If ordinary people want to buy it, they must hold a letter of introduction and go to a chemical raw material store to buy it.
His face became confused, and he stared at the rock: "It's just... how could there be magnesium powder on the rock?"
Li Aiguo took the rock from his hand and said with a smile: "There are not only traces of magnesium powder on it, but also aluminum powder, copper oxide, and iron oxide. You see, this black piece is not dirt, but powder." shaped activated carbon.”
Hearing these words, Old Mao, who had been disapproving at first, suddenly became serious.
These materials are chemical materials and are difficult for ordinary people to come into contact with. How come they appear on the rocks in the cave?
Experience tells him that anything that goes against common sense is an important clue.
"Patriotism, what's going on?"
Li Aiguo was originally just suspicious.
Now that I have discovered these chemical materials on rocks one after another, I feel confident.
He walked to the crowd with the rock in his hand, holding it behind his back with one hand and holding the rock in the other, and explained slowly.
"Team leader, the root of the matter is still the explosion without explosives."
"The little comrade found no trace of the explosion at the scene."
"At that time, I was surprised that a cave that was impossible to collapse collapsed at the most unlikely location."
"And it's weird that there hasn't been an explosion yet."
The old cat nodded in agreement.
Li Aiguo continued: "You guys know that I am a train driver and I drive trains everywhere all day long."
"The passengers on the train come from all over the world, and they are all very talented and well-spoken."
"So, when I'm not driving the train, I always like to chat with the passengers on the train."
“One time, I met a university professor and we talked about blasting.”
"He told me that before liberation, an old scientist once experimented with a method of blasting without explosives."
"Mix magnesium powder, aluminum powder, copper oxide, ferric oxide, and powdered activated carbon together to make something called a rock expansion agent."
"Just knock a small crack in the rock, pour the rock expansion agent into the water, stir it into a paste, and pour it into the crack."
"After a few hours, the rock will naturally crack, and the effect is exactly the same as blowing up the stone with explosives."
As soon as he finished speaking, Captain Cai Fangshun, who had been thinking deeply, nodded heavily.
“I’ve heard of rock expanders.
At that time, the news spread that scientists had invented rock expanding agents.
The Japanese were worried about mining the mines at the time, and immediately sent people to arrest the aging scientists.
The old scientist jumped into the river in order to keep the formula from being taken away by the Japanese.
The recipe has since been lost. "
As he spoke, anger appeared on his face: "After liberation, our railway soldiers also tried to find the formula, but found nothing. Unexpectedly, the Japanese got it after all!"
As a railway soldier, I often have to blast mountains. Some mountains have special environments and are not suitable for the use of explosives.
Sometimes, Demomen need to risk their lives.
If the formula for rock expansion agents could be found, a great deal of danger would be avoided.
Company Commander Cai Fangshun realized this instantly and raised his head to look at Old Cat.
"Comrade team leader, the formula is important for ten minutes. Please find it."
"do not worry!"
Lao Mao promised, but turned his attention to Li Aiguo.
Since this kid can detect that the enemy is using rock expansion agent, he must have some ideas about finding the enemy.
Time was running out, so Li Aiguo continued without hesitation: "According to the old professor, danger can easily occur during the preparation of rock expansion agents. The old scientist had his right hand blown off."
"And Zhang Lie is a mountain man. Even if he knows the formula, he can't get the chemical materials and prepare the rock expansion agent."
"When we searched the leather goods shop, we did not find any chemistry-related instruments or books in Liu Chunjing's household."
"So, there is still a shadow beside Liu Chunjing."
"Shadow has certain chemical experiment capabilities and has access to raw materials for rock expansion agents."
Li Aiguo pointed to the top of the cave: "According to my estimation, to cause such a large-scale collapse, at least several dozen kilograms of magnesium powder would be needed."
"Shadow was able to obtain such a large amount of materials without attracting the attention of others. He is probably an engineer in a chemical plant or a teacher in the chemical engineering department of a university."
These words were like a bright light, illuminating the gloomy mood of the members of the investigation team.
"Good boy, I really have you!"
Lao Dao, who was always sullen, rushed up and hugged Li Aiguo heavily.
I almost can't breathe.
Why do gay men in this era like to express their gratitude in this way?
Why do lesbians just stand around and giggle?
It's not fair!
"Comrade Patriot's analysis is very reasonable."
"Yanzi, please contact the higher authorities immediately and screen the suspects according to the standards set by Comrade Li Aiguo."
"yes!"
Beep beep beep beep beep beep, the radio waves passed through the mountains and flew to every corner of the land of China.
Countless comrades in special positions got up from their warm beds overnight and rushed to their jobs.
Rescue team camp.
"Brother Diquan, come with me."
"Can I see my brother again?"
Liu Diquan looked around in panic.
The shadows of the guards could be seen across the tent, and there was silence all around. All he could hear was his own beating heartbeat.
Even though he was locked up in the camp, he still received the news.
The members of the survey team have been under severe scrutiny since they were brought up.
Review is a long and painful process that does not start easily or end simply.
Now Li Aiguo asked him to see his brother.
Is there really something wrong with my brother? Li Aiguo decided
(End of chapter)
