When you are rich, there is Rheinmetall; when you are poor, there is Rheinsteel!

Listening to the voices of the people behind him, Luo Ping picked up the shovel without giving up and shoveled the ground twice more.

The shovel collided with the ground, making a clanging sound.

Can't dig.

It can't be dug out at all.

He took a deep breath, threw away the shovel, picked up the pickaxe next to him, raised it high, and then smashed it down hard.

The pickaxe made of high-carbon steel collided with the cold ground. The hardness of the ice cube was ultimately the difference between the two.

It was dug in about 5 centimeters.

Luo Ping took advantage of the situation and pressed down with the pickaxe, prying up the soil on the ground, which was about the size of a fist.

Looking at the piece of soil, a trace of ferocity flashed in his eyes, he swung the pickaxe again and dug down again.

"Dig, dig hard for me."

Hearing his cry, the people from the security department and the construction team picked up their pickaxes and started digging frantically against the cold ground.

The ground in winter is very hard, but it still cannot stop these wolves and tigers.

Slowly, the people on the ground disappeared.

The entire 567 base has become busy, and the flow of time seems to be speeding up at this moment.

In the blink of an eye, 10 days passed.

Luo Ping rushed out of the tunnel with his men, wearing a vest, showing his muscles, looking up to the sky and roaring.

"ah."

After the roar, a cold wind blew, making this man in his 40s instantly look 40 years younger, because he was frozen into a grandson.

After changing out of his muddy clothes and putting on clean and fresh clothes, he couldn't wait to run towards the residential area.

He didn't find anyone at Lin Yu's house. After asking around, he found out that Lin Yu had gone to the artillery shell workshop, so he rushed to the artillery shell workshop without stopping.

However, when he arrived at the artillery shell workshop, he learned that this group of people had already gone to the weapons testing site.

This news made Luo Ping want to curse.

Because the place where the tunnel was dug was not far from the weapons testing site, he had made a full circle in the twelfth lunar month.

No one was found.

At the weapons testing site, weapons testers followed standard procedures and fixed the Yasin 105 to the launcher. Then, they tied the firing rope and then stepped back little by little.

This is the first time a weapon is tested, no matter what, being careful is the best policy.

After retreating to a safe area, the tester handed the rope to Jiang Song. Jiang Song took it and handed it to Lin Yu next to him.

With a hint of flattery on his face, he said: "Director, come on."

Reaching out to take the rope, Lin Yu glanced around to make sure it was safe, and then pulled the rope hard.

The pull cord was stretched straight, instantly triggering the launcher.

The trigger moves and collides with the rocket launcher's primer.

Flames are ejected from the rear of the launch tube, and the rocket in front is pushed out of the launch tube under the reaction force and hits the steel plate in front.

boom.

There was an explosion.

Behind the bunker, Lin Yu released his hands covering his ears, turned to look at the person in charge of weapons testing next to him, and asked:

"How long has passed since the launch of the explosion?"

The weapons tester lowered his head to look at the stopwatch in his hand, raised his head and reported a few numbers: "The target is 200 meters away, and the time from pull to explosion is 2.76 seconds."

Hearing this time, Lin Yu estimated the moving speed of some tanks and shook his head unsatisfied:

"The initial speed is a bit slow."

"Come on, let's go see the target."

Soon, a group of people crossed a distance of more than 200 meters and came to the target.

The so-called target is six homogeneous steel plates stacked together with a total thickness of 600 mm and a size of 1 meter × 2 meters.

It’s not because you can’t afford a whole piece, but because 6 pieces stacked together are more cost-effective.

The launched rocket blasted a large hole in the lower left corner of the homogeneous steel plate.

And because of this big hole, the entire homogeneous steel plate is a little skewed.

But the rocket aims at the middle of the homogeneous steel plate.

There, someone used pink chalk to draw a cross.

Using a tape measure to measure the distance from the center of the big hole to the center of the pink cross, Lin Yu shook his head: "It's too heavy."

"There was something wrong with the flight attitude and it fell seriously."

"The last thing is the initial speed of flight, which needs to be improved."

"Shoot the remaining rounds together."

Beside him, Jiang Song wrote down these words as quickly as possible, made sure they were not missed, and immediately called the weapons testers to continue the test.

This time, the testers moved the aiming position a little higher.

Along with the countdown, another rocket was fired, but the impact point fell on the lower right side of the target.

There is still a little distance from the pink chalk cross.

The data was recorded and the weapons personnel continued testing.

Luo Ping, who had been waiting for a long time, finally found an opportunity and quietly came to Lin Yu: "Director, our tunnel has been dug. Please take a look."

Lin Yu nodded and told Jiang Song to pay attention to safety. Then he turned around and walked to their training ground with Luo Ping.

Soon, the two came to the entrance of the tunnel.

Looking at the several large mounds of soil piled at the entrance of the tunnel, Lin Yu said nothing. He just took out his notebook and used a tape measure to measure the size of the mounds and the distance from the entrance of the cave.

Record the data and follow Jiang Song into the tunnel.

The dimensions of the tunnel were dug according to the height of the big men in Shandong Province.

Lin Yu, who was 1.78 meters tall, stood in the cave with about 20 centimeters above his head and about 1.2 meters wide.

Very spacious.

Luo Ping walked in front and kept introducing to Lin Yu: "We have widened this place and it can be used as a lounge."

"This is where the ammunition is stored."

"Here, we are going to put two table tennis tables, so that we can play table tennis and relax during training."

"Then, I'm going to put some books here."

"..."

Following his introduction, Lin Yu quickly walked through the tunnel.

Returning to the entrance of the tunnel again, Lin Yu's notebook was also full of writing.

Using the light from the entrance of the cave, Lin Yu asked curiously, "I remember I gave you the drawings, right?"

"On the drawings, I have clarified the excavation requirements for this tunnel."

"Permanent fortifications. They need to be supported, and they are multi-layered. They also need to be protected against flooding, fire, smoke, and enemy attacks from tunnel entrances."

"Look again at the tunnel you dug."

"We are right at the entrance of the tunnel. Apart from this exit, you only have one other exit left. If the enemy blocks the two exits, they will flood the tunnel with fire and smoke, or directly mobilize people to force their way in through this hole."

"what would you do?"

"You are the turtle in the urn, waiting to be caught."

"You don't even have ventilation here."

"Also, authentic drainage."

"That is to say, the digging is not deep now, and it is still winter and there is no rain."

"If it rains, your tunnel will turn into an underground river. When the time comes, I'll see if you can evolve... No, you will degenerate into fish-men."

"Moreover, you only dug one layer. My drawings clearly require three layers."

"Tear down these tunnels and dig them again."