The pitch-black Unimog RV, after leaving the Mengde Nuclear Power Plant, galloped all the way in the direction of Mengde City, and did not encounter any twists and turns on the way back, only encountered dozens of ordinary zombies that did not have long eyes, and then returned to Mengde City.

"Rest for the night in the city tonight, and start again tomorrow." After returning to Mengde City, the sun was already a little westerly, and Han Feng shouted to Ning Xueru, who was sitting in the passenger seat, wearing a maid outfit.

"Understood, then I'll go cook first." Ning Xueru naturally did not have any objections to Han Feng's order, she immediately nodded her head, then stood up, walked into the RV living area, and began to get busy.

When a braised chicken thigh with an attractive color and a portion of shredded potatoes with green pepper were served on the table, while Ning Xueru was serving the rice there.

Han Feng looked at the dishes on the table, secretly said sorry in his heart, and put two small white pills in the braised chicken thighs.

Those two small pills are actually two sleeping pills.

He had already made up his mind, and after dinner, he began to upgrade the mechanical core, and the mechanical core was the biggest secret in his body, he didn't want anyone to know this secret, so he could only let Ning Xueru fall asleep as soon as possible.

"Hey, why are you so sleepy after dinner today, maybe my nerves are too tense at the end of the day, or should I rest first?"

When Ning Xueru finished dinner, cleaned up the pots and pans on the table, and took a bath, the effect of sleeping pills had completely come up, her eyelids gradually shrugged together, and her body fell straight on the bed.

Han Feng looked at Ning Xueru who was lying on the bed, picked her up who was already asleep, and after getting off the RV and setting it in, he took out a silver-white suitcase and walked quickly to the front of the Unimog RV.

At this moment, the RV's physical material conversion cabinet has bounced out of the vehicle's chassis, and it looks like it is ready to absorb the nuclear fuel rods.

Han Feng, who had already stepped out of the RV and was standing in front of the car, saw the physical material conversion cabinet that had popped out, and slowly opened the suitcase made of tungsten alloy in his hand, and the nuclear fuel rod in the box suddenly revealed its true face.

The nuclear fuel rods that reveal their true colors are cylindrical, and the two ends of the cylindrical shape are not completely closed, but half-open, and its honeycomb-like internal structure can be seen along the half-open fuel rods.

Han Feng looked at the nuclear fuel rods lying quietly in the suitcase, took a deep breath, and then quickly placed the fuel rods in the physical material conversion cabinet.

When the physical material conversion cabinet was slowly withdrawn, the familiar electronic sound sounded in Han Feng's mind again: "Five kilograms of nuclear fuel rods have been detected, the mechanical core breakthrough task has been completed, the mechanical core level is being upgraded, the countdown is ten minutes, the mechanical core fusion, the Unimog RV is temporarily unusable." ”

After the electronic sound, a clock with a ten-minute countdown appeared in his mind, and the red hands turned backwards 'tick, tick'.

"It took ten minutes to upgrade the mechanical core."

Han Feng was also stunned when he found that a countdown clock appeared in his mind, no matter what the upgrade of any project before, the mechanical core was completed in an instant, and this time the level was raised, it actually took ten minutes, and the RV was disabled.

Over time, as the upgrade progress of the mechanical core slowly improved, the Unimog RV underwent visible changes to the naked eye.

The original body length of the RV was just over six meters, but it slowly became longer at a speed visible to the naked eye, and the body length of the entire RV has now reached eight meters.

And the equipment manufacturing workshop, which was originally only connected by hooks and dragged behind the RV, has also been connected to the RV.

Pieces of black metal plates, from the rear of the RV, gradually extend backwards, wrapping the equipment manufacturing workshop that originally existed independently in the RV.

At this moment, the appearance of the Unimog RV has completely changed, from the original two-axle RV to a three-axle RV, and the length of the body is as long as a small bus.

When the countdown clock in Han Feng's mind returned to zero and the mechanical core upgrade was completed, the hologram of the Unimog RV in his mind reappeared, and the information of various parts of the RV was marked on the hologram one by one, and the detailed information of the vehicle also resurfaced in his mind.

Model: Unimog U4000 RV

Brand: This time

Power: Gasoline powered

Engine: /2 engine

Fuel tank: main fuel tank 340L / auxiliary fuel tank 180L

Water tank: 200L

Mechanical core fusion transformation:

Weapon Modification: Sky Dome Super High Energy Electromagnetic Cannon Module, each fire calls 200L of fuel to convert into high-energy electromagnetic waves, causing a wide range of damage, and the cooldown time is 1 hour.

Protective modification: The shell is modified to alloy armor level, which is equivalent to about 500 mm of homogeneous armor (resistance to general impacts)

Fuel Tank Modification: The vehicle fuel tank has been upgraded to increase the capacity of the 180L fuel tank and improve the robustness of the fuel tank.

Engine modification: The vehicle engine is upgraded to increase the engine speed and reduce the engine fuel consumption

Tire Modification: Vehicle tires are upgraded, vehicle tires are replaced with run-flat tires, no matter how broken they are, they won't burst!

Power retrofit: Upgrading the power system to nuclear power (powered by a miniature nuclear reactor)

Special Modification: 10L of extra-dimensional storage space

After Han Feng saw the information of the whole row of Unimog RVs, his face showed an excited look.

The RV in front of him now is his strongest killer weapon and the most stable haven in the last days.

One of the most significant changes after this mechanical core upgrade is the integration of the RV and the addition of a miniature nuclear reactor at the rear of the RV living area to supply energy to the vehicle.

With this miniature nuclear reactor, the energy system of the original car can take a back seat.

The Unimog RV, which was originally a fuel guzzler, has also completely gotten rid of this name, the reason is that the car is now completely gas-free.

And the Sky Dome ultra-high energy electromagnetic gun module, which originally consumed a lot of fuel, no longer has to worry about fuel consumption, as long as the cooling time of the barrel is up, it can be fired again, so that the frequency of its use is greatly increased.

"After the mechanical core is upgraded, in addition to the changes to the body and the addition of a miniature nuclear reactor, where can the entire Unimog RV be further improved?"

At that time, the evolution system of the RV shocked Han Feng.

With questions, he clicked on the hologram of the RV, and then new evolution options appeared in front of him.

When he saw these evolutionary contents clearly, his mouth opened uncontrollably again, and the evolutionary contents of each line were really beyond the limit of his imagination.

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