"It's a bronze level 5 King Tower defense system, but, Your Majesty, the other party is asking for 108,000 Star Source Stones!" Lan Weiwei said.

"Is this price reasonable, Vivi, do you feel about it?" When Lu Feng heard such a terrifying offer, he immediately frowned deeply.

Frankly speaking, Lu Feng himself did not know the specific market price of the Interstellar Exchange's defense system for the King's Tower.

"Your Majesty, this price is relatively reasonable, after all, it is a bronze level 5 king tower large defense system, according to the description of the other party, equipped with a bronze level 5.5 national king tower energy defense shield, as well as 6 bronze level 5 all-round large 'queen bee rapid-fire cannon', this large rapid-fire cannon accelerates all shells through the dense electromagnetic coil in the body, each with 8 small cannons, is a very terrifying scattered kinetic energy weapon. Of course, the other party said that this King's Tower defense system is also equipped with other early warning systems, repair systems and other ancillary equipment. ”

"Okay, if Weiwei, you think the price is reasonable, then do it, I believe in your vision!"

"Well, thank you Your Majesty for trusting me!"

After another three days, the full set of equipment for the defense system of the King's Tower, called the "Iron Castle", was transported into Noah City by Vivi with the royal guards, and began the complicated construction project.

Under Lan Weiwei's sharp negotiation offensive, although the merchant on the other side did not reduce the price, he still made a certain concession and distributed 2 more "Queen Bee Rapid-Fire Cannons" in Noah City, because the other party happened to have inventory, and it had not been sold for a long time!

In this way, the King's Tower in Noah City not only has its own bronze 5.5 tower-shaped protective shield, but also is equipped with 8 powerful Queen Bee rapid-fire cannons, and its defense has risen by a large step.

In addition, Noah City's ace army, the Royal Female Guard, the elite troops directly under His Majesty King Lu Feng, are responsible for protecting the King's Tower to the death, and they are all equipped with the most advanced weapons in the city, which makes the internal and external defense of the entire King's Tower even more impregnable!

Noah City originally had a reserve of 181,000 Star Source Stones, but after deducting 30,000 to upgrade the King's Tower, 30,000 to purchase technology, and 108,000 to purchase the King's Tower's defense system, only 13,000 Star Source Stones were left!

Lu Feng suddenly fell into the old problem of egg pain again: Noah City is running out of star source stones again!

Moreover, the production of mechanical troops in the back also needs to buy a lot of smart chips, and this budget should be around 10,000 star source stones, which means that the star source stone reserves of Noah City have dropped to less than 3,000 embarrassing alerts.

Regarding the smart chip implanted by the Noah City Intelligent Mechanical Corps, Lan Weiwei and the mechanical team led by her have also been conducting in-depth research according to the "Machine Emperor (1/4)", because in this god-level technology, there is indeed a technology about robot intelligent chips.

But this kind of core technology, even if it is the most rudimentary, Lan Weiwei and her R&D team will take a very long time to overcome.

But once this core technology is conquered, even if it is only the most rudimentary, Noah City will not need to buy those expensive smart chips in the interstellar exchange, and its own mechanical army will be more intelligent, with a lower failure rate and faster operation efficiency.

Of course, the machine R&D team led by Lan Weiwei did not gain nothing, during this period of time, they finally developed a robot that can intelligently mine the veins of Xingyuan Stone, and Lu Feng named them - Exploration Machine!

Although the storage quantity of Xingyuan stone is average each time, it is better to move very fast in suspension, and the cycle of back and forth mining is fast, and it can do simple ore to rough and refine the processing, which greatly facilitates the preliminary operation of the rear plant line and refinery.

As long as the machines are well maintained, these probes can basically ensure that the whole line of mining is at least 20 hours a day!

When he learned that Noah City's intelligent mining machine could finally be officially put into production and use, Lu Feng was about to jump for joy, which meant that the small star source stone vein in the primitive tribal country that had been laid down at the beginning was now filled with red strong biochemical viruses in the whole area, and it could finally be officially mined by himself.

You must know that I am too short of star source stones now, and I don't dare to invest in human beings to mine, for fear of being infected by those fierce viruses and becoming zombies!

And the good news is always one after another, Dr. Fang He's side finally found the antivenom for the light green biochemical virus that the old king used to have, and Wei Wei also personally took Dr. Fang He and his team into the ruins of the old kingdom to conduct experiments and verification, and it can indeed completely detoxify those zombies who are still roaming after infection.

"Finally, the people there can rest in peace, and the old king in heaven can rest at ease......"

Looking at the zombie group in the ruins of the old king, after the antivenom spread in the air, they fell down one by one and rested in peace, Lan Weiwei was full of emotion, and Ling Yan's eyes were completely moistened!

Dr. Fang He and his virus gene team, the strength is really not enough, they were able to conquer the light green virus of the Biochemical Country in such a short period of time, and Lu Feng was completely impressed by them.

And next, their task is even more arduous, that is, the terrifying fierce red virus of the primitive tribal country, which should be a super evolved version of the light green biochemical virus, and it is also a super new virus that makes Lu Feng completely frightened.

Recalling the scene of the primitive tribal country, Lu Feng still trembled faintly in his heart!

Now the total population of Noah City has reached 107,000, including 43,000 military workers, 2,000 regular troops, and 700 royal female guards.

Lu Feng has assigned 20,000 military laborers to produce small spider-guardians, with an estimated output of 4,000 per month; Another 20,000 military laborers were divided into the production of Weiwei's newly developed medium-sized spider-pursuer, a new type of heavy firepower artillery unit, after a long period of testing, it was finally completely stable and officially put into the production line, and 20,000 people per month are expected to produce 1,000 heads!

The pursuers were about 1.5 meters tall and 2 meters wide, and they were also spider-like limbs, black metal, carrying two eight-barrel bomb magazines on their shoulders, equipped with 16 high-explosive missiles. When fighting, it can spit out a light cannon in its mouth, which is rapid-fire and fast, making it ideal for street and highland battles.

The pursuer is the second new type of intelligent machine combat unit developed by Lan Weiwei's team through the "Machine Emperor" technology after the "Small Spider-Guardian", with average movement speed, but quite fierce firepower and higher intelligence. Because of its huge size, the production time and cycle in the factory line are relatively long.