Su Yan spent 350,000 gold coins to build an underground tunnel leading between the two bases.

And after the tunnel was built, the gold coins on him were completely bankrupt!

There are only more than 20,000 gold coins in the system.

But Su Yan doesn't have to worry at all, because there are still a lot of crystal nuclei in his hands.

The crystal nucleus in Su Yan's hand is worth several million.

After all, it was the crystal nucleus that was captured after massacring a whole wave of corpses!

"System, is the underground tunnel durable? Will it be dug through by some zombie rats in the underground?" Su Yan asked.

Although Su Yan is very confident in the system's products, there should be no collapse or the like.

But after experiencing the scene of mutated ants coming out of the ground not long ago, Su Yan knew that the underground is not very safe.

[Drip! Commander, please don’t worry, the walls of the underground tunnel are all reinforced bricks within one meter, which are anti-corrosion and compression-resistant!】

[If the commander wants to strengthen it, he can increase the thickness of the reinforced bricks. Based on the commander's current tunnel length and cross-sectional area, it will cost 100,000 gold coins for every additional meter of reinforced thickness|317

Su Yan: "..."

The dog system is thinking about how to cheat gold coins all the time.

The point is that he really wants to spend the money!

With Su Yan's level of caution, it is impossible for him to make the reinforced bricks of the tunnel only one meter thick.

"After returning to the base, exchange some gold coins with the crystal nucleus, and then strengthen the tunnel."

After all, with a one-meter-thick tunnel, Su Yan was really a little worried.

Su Yan looked at the fanatical people below, feeling calm in his heart.

There was a cold mechanical sound directly through the watchman's mecha.

"From today onwards, you will be protected by the Red Police Force! I will take you to rebuild your home in this abandoned middle school in the last days.

Su Yan's voice just fell.

Immediately, there was a thunderous echo from below.

They struggled too much in the last days, and now they finally saw hope again, and naturally became very fanatical.

Su Yan did not enter the base, he just placed the 200 Rhino tanks here.

Staying here with Rhino tanks are (bgee) hundreds of rocket pilots in the sky.

"Since the mission is completed, the soldiers stationed in those strongholds should also be taken back."

After all, there are nearly 900 temporary garrison points, but there are four to five thousand soldiers in them.

If these soldiers have been stationed there, it will definitely not work, they must be taken back!

These rhino tanks and rocket pilots of Su Yan are relatively safe here.

"War Fortress, follow me back to recover the soldiers!"

Accompanied by Su Yan's order.

The five huge war fortresses left the perimeter of the wall in a mighty way, along with those super personnel carriers.

Those people in the military region of province A were very confused when they saw the war fortress that was drifting away.

Why come and go?

But they didn't care about anything, because those people sent a lot of tanks, as well as those special soldiers flying in the sky.

"I'm going, so many tanks? Just give them away? These tanks look stronger than the strongest tanks in our base!"

"That's right, don't you look at who sent these tanks!"

"I was skeptical about this so-called Red Police force, but now I'm completely convinced!"

Chen Fan and the others standing on the wall finally came to their senses at this time.

"The soldiers follow me out and welcome all the tank troops outside into the base"

Soon, many soldiers came out one after another.

After these soldiers had close contact with the rhino tank and rocket pilots, they were surprised again.

Especially for some tank players, the structure and structure of the Rhino tank is simply beyond their cognition.

They can't even understand why there are tanks constructed in this way.

And the group of flying rocket soldiers in the sky is also very eye-catching.

These soldiers gathered around the tank to observe one by one.

It's much faster to go back the same way than when you came.

When the war fortress came, the ground had been run over once, and the zombies on the roadside were almost cleaned up.

The time to go back has been doubled compared to the time when he came, and he has returned to the minister of the base in less than three days.

As soon as Su Yan stepped into the base, the sound of the system behind him came out.

[Drip! Congratulations Commander Allied Warfare Laboratory has successfully completed construction]

[Drip! Congratulations to the commander for successfully unlocking new defensive buildings: Hyperspace Teleporter, Weather Controller]

[Unlock new tank modules: Prism Tank, Allied Missile Launcher]

[Unlock new soldier modules: Navy Seals, Time-Space Teleportation Troops

!!!

Su Yan froze in place.

He couldn't believe his ears.

Unlocked the Chrono Teleporter...and...the Weather Controller!!!

Unlocked two super weapons at once!

In Su Yan's view, the establishment of the Allied Forces War Laboratory can at most unlock a super weapon like a hyperspace teleporter!

But I didn't expect to be able to unlock the weather controller

This is an accident within an accident!

And not only have super weapons, but also unlock other types of arms and tanks.

【Hyperdimensional Teleporter: After establishment, it can teleport objects within a range to another place [a tenth-level superdimensional teleporter can only transmit objects within a range of 300 meters * 300 meters]

[The teleportation range of the hyperspace teleporter is limited to the super radar area, and the CD period for one transmission of the hyperspace teleporter is: 12 hours]

[Required gold coins: 50,000]

After Su Yan saw the hyperspace teleporter, his eyes were slightly disappointed.

The hyperspace teleporter is not as strong as he imagined.

It can only be teleported freely within the monitoring range of the super radar, and the CD period is as long as 12 hours. For Su Yan at the current stage, this hyperspace teleporter is useless.

use.

At this stage, it may not be able to reflect the power of the time-space teleporter, but unlocking the time-space teleporter also unlocks an additional unit.

Hyperspace Troops!

[Overtime Soldier: Holding a time-space teleportation gun, once hit by the time-space gun, it will be teleported to an unknown space instantly. A time-space soldier can teleport almost everything! And this soldier has unlimited teleportation ability, and can appear at will Anywhere within the monitoring range of the super radar. 】

[Required gold coins: 5000].

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