There is a term in sociology called path dependence.

The general meaning is that once people make a certain choice, the power of inertia will make this choice continue to strengthen itself, and people will not get out easily.

For example, if a country is accustomed to purchasing advanced foreign weapons, when its neighboring countries have more advanced weapons, its first thought is to purchase more advanced weapons instead of developing them itself.

For example, the government’s theory of making is worse than buying.

For example, the third brother next door.

After Zhang Tuohai gained benefits from breaking through walls, now when he encounters a wall, he usually breaks through it directly instead of going around it.

This factory uses a frame structure. In addition to the main supporting steel frame, there is a layer of iron outside, which looks like a plastic greenhouse.

The factory is filled with various machines, and groups of workers wearing blue overalls are busy on the production line. Noisy noises resound throughout the factory.

Zhang Tuohai glanced at it and was surprised, then his face showed joy.

He discovered that this was actually a steam tank manufacturing factory.

Tracks, gun barrels, and armor plates were transported from the production line and assembled into steam tanks.

"If we kill this place, the strength of Gray Rock City will definitely drop a lot!"

Anyway, he has a deadly feud with Gray Rock City now. If there is an opportunity to weaken Gray Rock City's strength, he will naturally not let it go.

Da da da!

Zhang Tuohai controlled the steam machine gun and fired several shots into the air.

The workers raised their heads blankly and looked at the intruder in shock.

"I announce that this place has been taken over. If you don't want to die, get out!"

In order to increase his persuasion, Zhang Tuohai pulled the trigger on several similarly assembled steam tanks.

Da da da.

The bullet hit the riveted armor and burned everywhere.

"Run quickly!"

The workers were stunned for a moment, then fled in all directions.

In less than half a minute, the entire factory became empty.

"Sure enough, this thing is still tough to talk about."

Zhang Tuohai patted the steam machine gun at hand, and then led his classmate Xiao Ai to throw anti-tank grenades everywhere.

Blow up all the machines that can be blown up, and throw one into the installed steam tank. Anyway, what Zhang Tuohai has to do is to destroy the factory's production capacity in the shortest possible time.

In addition to these machines, there are also mountains of metal ingots and metal parts in the factory.

All from level 1 to level 3.

These are the materials used to make steam tanks.

However, it all belongs to Zhang Tuohai now.

In the corner of the factory, Zhang Tuohai saw a huge canvas, which seemed to be covering something.

Out of curiosity, Zhang Tuohai pulled off the canvas.

Under the canvas is a metal box. This metal box is very huge, about 8 meters long, 6 meters wide, and 4 meters high. From the outside, you can see various complex gears hanging outside the metal box.

"What is this?"

Out of curiosity, Zhang Tuohai walked around the box and found a small door at one end of the box.

Zhang Tuohai opened the door out of curiosity.

Inside the metal box are also various complex mechanical transmission devices, as well as several things like mechanical arms, but they are all equipped with screwdrivers, pipe wrenches and the like.

What shocked Zhang Tuohai the most was that there was actually a helicopter inside the metal box!

Perhaps a rotorcraft is more appropriate.

This thing is like a chair with a propeller installed on it. There are some steam pipes and metal shields around the chair. The simplicity is shocking.

The only weapon is a steam machine gun.

It seems that the combat method is similar to that of the aircraft in World War I.

[You have discovered steam technology-specific level 4 auto parts: a repair factory that is extremely suitable for steam rotorcraft. You need to open the weird technology tree to install it. The test meets the conditions. Do you want to install it?]

[Steam rotorcraft is an extremely supporting repair factory: Steam technology-specific level 4 auto parts. After loading, the vehicle will have a steam-powered rotorcraft (helicopter). The driving method is manual driving. It can be used for armed reconnaissance. The airborne time is 2

hours. After damage, it can be repaired in the maintenance factory. Armament: one steam machine gun, ordinary rivet baffle.]

"Awesome!" Zhang Tuohai's eyes sparkled.

With this thing, he has air power, which is very useful for both reconnaissance and attack.

It greatly enriches his combat methods.

It’s exciting to think about adding a helicopter to an infantry fighting vehicle.

"Install!" Zhang Tuohai said loudly.

A white light enveloped the metal box and Zhang Tuohai's infantry fighting vehicle.

After a while, the white light dissipated and the metal box disappeared. Zhang Tuohai felt that the infantry fighting vehicle seemed to have been slightly stretched by about half a meter, and the rest remained unchanged.

"This thing also uses space expansion technology?"

Zhang Tuohai rolled into the car and found that the steam rotor counterattack and supporting factory had been installed at the rear of the infantry fighting vehicle, separated by a metal door.

Opening the metal door, the steam rotorcraft is parked there quietly, with hatches and lifting platforms in place.

Ready to take off at any time.

Zhang Tuohai touched the steam rotorcraft with joy and wished he could take it out and fly around now.

However, classmate Xiaoai interrupted his fantasy.

"Commander, a large group of infantry appeared at the gate of the factory, as well as the sound of steam tanks. The enemy is expected to arrive on the battlefield in 30 seconds."

"Use shrapnel to contain the infantry, then find the abandoned intercity subway tunnel and leave here."

Zhang Tuohai ordered.

"Understood!"

Boom, boom!

Two shrapnel shells were fired, blocking the infantrymen from outside the factory gate.

After suffering dozens of casualties, those infantrymen hid behind bunkers and did not dare to come forward again, waiting for reinforcements from steam tanks.

Subsequently, Zhang Tuohai found the entrance to the intercity subway tunnel under the prompts of the prompt system.

The entrance is sealed by a brass door, and there is a complex mechanical lock that requires three keys to be inserted at the same time to open.

However, Zhang Tuohai is not the kind of person who opens doors honestly.

Since the door is very strong, just go around it.

Zhang Tuohai took a few steps away, and then aimed the 75mm gun at the wall next to the gate.

Boom, boom!

Following several gunshots, the brick wall next to the gate collapsed and shattered, revealing the dark intercity subway tunnel.

Because it had been abandoned for a long time, it was dark inside and a damp smell came out.

"That's it, let's go!"

Zhang Tuohai turned on the headlights and rushed into the tunnel first.

Zhao Wanwan then entered.
Chapter completed!