After visiting the underground secret laboratory of the Central Academy of Sciences, Qiao Lu officially determined the exchange plan for civilization points:

[Symbiote Armament] + [Psionic Theory (Beginner)], a total of 45,000 civilization points.

The psionic theory is naturally to prepare for the control of the swarm, and after the Queen of Blades is beaten back to its original form, the swarm will fall into a leaderless state of division, which is a good opportunity for the wandering earth to take advantage of the situation.

On the other hand, only after mastering the psionic energy can the Wandering Earth reverse-engineer the previously captured Star Spirit Machine, or even repair it and put it back into the battlefield. This has a direct improvement in the combat effectiveness of the Wandering Earth, and it is undoubtedly the most suitable option at the moment.

As for the symbiote armament, in the short term, it is to improve the biotechnology of the wandering earth in order to better study these alien biological samples.

In the long run, after successfully taking over the swarm with the Mind Gem, if you want to combine the Zerg troops with the human forces to produce stronger combat effectiveness, the symbiote armament is undoubtedly an excellent way, and maybe even be able to create the next Blade Queen.

Just as World of Warcraft must have a Lich King, StarCraft must have a Queen of Blades to lead the swarm in the right direction, and both technologies are indispensable for that.

After exchanging [Symbiote Armament] and [Psionic Theory (Beginner)], Qiao Lu only has 10,000 civilization points left, which is not enough to exchange for other technologies.

That's all the help that the system can provide, and the rest is up to the efforts of everyone on the wandering earth.

Thinking of this, Qiao Lu prepared to go to Shanghai to see how the fortress was being built now.

Through the planetary engine teleportation tower, Jolu arrived in the blink of an eye in the city that had become the headquarters of the United Government. Two months later, the final battle between the Wandering Earth and the Queen of Blades will begin here.

After this period of construction, the Shanghai fortress of the wandering earth has begun to take shape.

The towering walls enveloped the entire city so tightly that even the air was covered by a barrier.

The walls are densely packed with heavy weapons, electromagnetic railguns for fighting large targets, large-caliber cannons for ground bombardment, and kinetic point-fire guns for intercepting small targets, which can cover the inside and outside of the city at any time.

At the same time, the entire city of Shanghai has been turned into a military base, and even if the outermost city wall is breached, entering the city is like a deep quagmire of fortifications, with machine gun turrets at almost every corner, and small prism towers can be seen everywhere like traffic lights.

In addition to the most important dungeon, there is a hidden and solid underground Great Wall under the city, dense tunnels up and down communication, the structure is extremely complex, like a long vine and a melon, the big hole can be used for trains, the small hole can be used for cars, the shape is like a maze but extends in all directions.

Even if the entire ground is occupied by the enemy, the defense forces can still move into the underground Great Wall to continue the battle. At the same time, these tunnels can also provide transportation support, so that supplies and soldiers can be sent to any place in Shanghai at any time.

These are just basic fortifications, and what really makes the Shanghai fortress the safest place on the wandering earth is the planetary engine here.

The first was the Shanghai No. 2 engine, which has now been officially transformed into the Shanghai Cannon. From the tens of thousands of meters high planetary engine, and then tens of thousands of meters high cannon barrels, let alone looking up at a glance can not see the end, even ordinary civilian helicopters can not fly, only military fighters such as Kun fighters and anti-gravity helicopters can reach the position of the gun.

As for the caliber of this planetary engine cannon, this is not something that can be intuitively felt with data. The only thing that is certain is that the so-called Gustav cannon is like a toothpick in front of it, and its caliber is large enough to stuff a frigate like the 10,000-year-old Blizzard directly into it!

Such an exaggerated weapon is naturally to deal with the flagship of the Queen of Blades, the Leviathan, which is the ultimate warship of the swarm, and the Wandering Earth also needs to come up with corresponding weapons to deal with it.

In fact, the Wandering Earth is ready for another round of Spring Festival 10,000 rings, no matter how many Leviathans the Queen of Blades brings by then, all of them will be beaten down for her!

As for the other planetary engine, the Shanghai No. 2 engine, it was transformed into a super fortress, responsible for guarding the entrance to the dungeon, and was the last line of defense on the surface.

The superfortress is naturally equipped with a variety of heavy weapons, including a giant prismatic tower located at the top vent of the planetary engine, which is only a little shorter than the Shanghai cannon, and when charged, it emits enough light to illuminate the whole of Shanghai as bright as day.

The Shanghai cannon is used for space defense, and the planetary engine fortress is used as the cornerstone of ground defense, plus a planetary engine to charge the keystone, which is the role of the three planetary engines located in Shanghai.

The fortifications that were so carefully set up really made Qiao Lu speechless. And these are only defenses visible to the naked eye, and God knows how many secret weapons are yet to be put on the table.

But what can be seen so far is daunting enough.

"It's really crazy."

Qiao Lu sighed as he entered the General Headquarters of the United Government, of course, the General Headquarters is located in the underground city under the Planetary Engine Fortress, which is also the core of the entire Wandering Earth Shanghai Fortress, and it is basically impossible for the enemy to invade here.

After passing through countless security checks and checkpoints, Qiao Lufang arrived at the general headquarters of the coalition government, which is also the new Earth Wheelhouse.

As expected, Luo Feng was nervously arranging the defense of the Shanghai fortress in the headquarters to prepare for the decisive battle in two months.

As mentioned before, this war determines the fate of everyone on the wandering earth, no matter how careful it is.

Luo Feng turned his head and saw Qiao Lu coming in, and he also ordered the work at hand first, before he came over and said hello:

"Welcome back, Qiao Lu, Ding Yi has already explained the situation to you."

Qiao Lu nodded and said, "Well, I've already heard him say it." ”

Luo Feng explained, "We should have consulted you, but when the keystone was sent back, you were still in a coma, so we made a decision first. ”

"It's okay, these things can't be delayed."

It is impossible for the coalition government to be unable to operate because of the lack of anyone, of course Luo Feng is right to do this, Qiao Lu has no opinion, it is better to make him more at ease.

This is the Wandering Earth! The Shanghai Fortress of the Wandering Earth!