The channel structure of the training ground is highly imitated by Songshan, and it adopts the method of using gasoline barrels as pipeline support and buried in deep trenches and tamping and fixing them with soil.

Due to the limitations of ventilation and lighting, we can only imitate it by taking a different approach.

The corridor in Songshan is backed by the underground fortifications of the bunker group. Whether it is ventilation or lighting, it has fortifications and does not need to be solved by the corridor itself.

This also ensures the concealment of Songshan corridor and the safety of being easily broken into the outside by the enemy.

The engineers under Yu Xiaoqing built this training ground without the time and energy to dig a huge underground space to support the training corridor.

It’s okay to have no lighting in the training corridor, but poor ventilation is a big problem.

More than 200 people are stuffed into such a long pipe, which consumes a lot of oxygen. If the oxygen is decompressed in the middle of the pipe, they will not be able to run out even if they want to.

These are all elite soldiers and powerful generals selected, and if they are so frustrated to death.

That fun was a big deal!

The commander of the engineering corps knew the seriousness of this matter and also had a way to deal with the ventilation of the pipeline, but he did not know what to do to meet the requirements required for training.

For this reason, the commander of the engineering corps ran to ask for advice from Yu Xiaoqing, hoping to give a specific construction plan.

Yu Xiaoqing was not familiar with engineering construction, and secondly, he was not familiar with this kind of stealing tactic. Thirdly, he had no idea about the Japanese corridor.

If you ask Yu Xiaoqing to come up with the construction plan, wasn’t it intentionally making things difficult for him, Mr. Yu?

In order not to lose face, Yu Xiaoqing acted as a thief with a dark face, saying that he was busy with official business and had no time. He waved his hand and asked him to find Feng Yuntian.

Feng Yuntian, who was trapped in the land of gentleness at that time, was worried that he could not get out and get some breath.

The commander of the engineering corps ran over to explain the reason, and Feng Yuntian immediately ran to the training ground of the formal workers.

After a detailed investigation and thinking, based on the limited conditions of the training ground type, we chose the characteristics of the Songshan corridor and came up with a feasible solution.

Every twenty meters, a square mouth with a width of two fists is opened in the upper part.

Although this solution sounds very simple, it just corresponds to the idiom "big coincidence is not crafty", which perfectly solves the current problem.

First of all, the issue of ventilation.

A vent for twenty meters is completely enough, so there is no need to worry about lack of oxygen in the pipeline and training accidents.

Secondly, the lighting problem was solved.

The light column illuminates in the vent can illuminate dozens of centimeters on both sides of the corridor.

This is as described by what Long Weng saw and heard. There are basic lighting equipment in the Japanese corridor, and an eternal light will be installed every ten meters.

Perhaps because of the increasing scarcity of supplies, the diesel used to generate electricity is no longer so abundant.

The eternal lights in the corridor are very dim, so they can only illuminate the small areas around them, and basically only play a role in positioning and pointing out the direction.

Feng Yuntian extended the spacing between the vents to twenty meters, which just solved the problem of higher sunlight.

After this small and subtle adjustment, the lighting conditions between the two are basically consistent, achieving a high degree of simulation effect.

Finally, this small ventilation vent can also prevent someone from cheating.

This twenty-centimeter diameter can penetrate the air and leak light, but people cannot get out of it. At most, they can look up at the blue sky to relieve the depression of the claustrophobic space.

The last one...

A hole is opened for each twenty meters, which can facilitate Long Wen and Feng Yuntian, observe the training situation in the corridor so that various adjustments can be made immediately.

For example, put some interesting things in and add some seasoning to this dish.

In summary.

Feng Yuntian's solution is a magical skill. Not only does it solve all construction problems, it also gives some new functions.

It is a perfect "one stone and four birds" and is a masterpiece of ingenuity.

The training ground perfectly simulates the Songshan corridor, which is also very convenient for outsiders to supervise the training, but it is very unfriendly to the trainees.

Meng Fanle was the first to climb in, even if he was not afraid of death on the battlefield, he was really guilty in this passage.

It is not specific whether to be afraid or panic, it is a kind of instinct in human beings.

Looking at the black Gu Longdong in front of him, he couldn't see his five fingers, and didn't know what was waiting for him. Meng Fan could only walk forward inch by inch.

Use the touch of your hand to replace all perceptions and explore the situation ahead as much as possible.

When a person loses his vision, using his hands to explore the situation and explore and move forward is the safest way and an instinctive way of self-protection.

This method has the highest security, and the disadvantages are also very obvious.

slow!

Very slow!

If Meng Fanle was the only one in the channel, they would be slower a little, and there would be no problem.

Unfortunately, there were 200 people behind his butt, as well as a dragon article who jumped and shouted in front of him and blew his whistle, like a death-seeking ghost.

Long Weng urges people outside to climb inside quickly, and the people inside can naturally urge people in front to climb soon.

Push forward one by one...

All the contradictions were pushed to the top, which was Meng Fanle, the first person to enter the hole.

Meng was impatient for a long time without moving, blocking the speed of the passageway to a close. Zhang Lixian was impatient by He Shuguang behind him.

He shouted: "You coward, you should climb quickly and get stuffed. I really think there are Japanese devils in front of you to bite you."

"Why are you anxious? Hurry up and reincarnate?" Meng fucked and replied angrily.

"Okay, don't listen, right? Then don't blame me."

Zhang Lixian remembered the scene he saw yesterday. When he saw the girl he fell in love with was thrown into someone else's arms, a nameless fire suddenly popped up in his heart.

He picked up the muzzle of the submachine gun in his hand and slapped at the thing that was vaguely wandering in front.

"Ao~"

Meng Fanli was poked and shouted on the spot, cursing: "Your uncle, are you fucking sick?"

"That's not my fault. If you don't move, I will push the gun in my hand forward. It's nothing to do with what I hit."

Zhang Lixian took revenge after a prank, and suddenly felt much more comfortable.

"If you have the ability, give me some more time? My little master, I will serve you directly with big feet, and I won't kick you to death."

Meng was fed up and refused to admit defeat, threatening Zhang Lixian to fight back, but was more honest in his body. In order to ensure the safety of local areas, he had to speed up the climb forward.

The road ahead was finally opened, but Zhang Lixian, who had successfully cleared it, was not happy.

Instead, I feel a little disappointed!

It seemed as if he hoped that Meng Fan could persevere and continue to block the front and remain motionless, so that he could vent his depression.

Meng Fan, as the front of the car, did not block the road anymore, and the commando's first step of hole-making training began to get on track.

It took nearly ten minutes.

As the last team member disappeared at the mouth of the oil barrel, all two hundred commandos entered the corridor and began their long "crawling journey".

Crawling in the corridor at a height of 60 cm, overcoming darkness and claustrophobic depression is only the beginning of this challenge.

The kind of constraints brought by narrow space and the kind of suppression that are blocked from front and back, up and down, are the biggest obstacles to progress.

For a normal adult man, the height of climbing forward reaches forty or fifty centimeters, while the diameter of the oil barrel is only about sixty centimeters.

This leads to everyone being forced to lower their heads when climbing forward.

If you look up, you will hit the top!

Maintaining such a posture for a long time is very uncomfortable for ordinary people.

In addition, the people who participated in the training carried weapons and brought everything except the bedding, which further increased their physical circumference and weight bearing.

This makes it very difficult for commandos to move forward every step when crawling.

In addition to these.

Because people consume a lot of oxygen during intense exercise, the vents leaving the pipe are not enough to quickly replenish the consumed oxygen, which can only ensure that the people inside will not be deficient in oxygen and feel stuffy.

A thin oxygen environment similar to that in the plateau has become the biggest problem that all team members need to overcome.

The corridors excavated by the Japanese army on Songshan did not excavate the ventilation openings separately for ventilation, and were maintained by ventilation equipment for underground fortifications.

At that time, the commando will enter the Japanese corridor and the air will be thinner.

If the commandos cannot adapt to the hypoxic environment, when the action begins to enter the corridor of Songshan, each of them will become weak due to lack of oxygen.

At that time, let alone dragging your weapons forward, I'm afraid it will be hard to take a breath.

Putting aside these major difficulties, there are many small problems like this, which require the team members to adapt to during training.

Fully adapting to and overcoming these difficulties is the goal to achieve in this training.

Although the things I practiced have basically no effect outside after leaving the corridor, and the improvement of combat effectiveness is minimal.

But for the success of a plan, one month, two months, three months...

Even if you spend a long time, you must practice this special training until all commandos can overcome all problems.
To be continued...