The secondary spiral arm and the main spiral arm of Orion can be said to be a relatively parallel position, of course, this is only in the plane of the Milky Way, in fact, the distance between the secondary spiral arm and the main spiral arm is about 300 light years, and the border between the two is more than 1500 light years long and hundreds of light years thick.

There are only three routes connecting the main and secondary arm, the Sirero route, the Seville route, and the Blanca route, because these three routes have star systems connecting the main and secondary arm, and the civilizations on the arm can be connected by the space-time currents between these star systems.

Otherwise, without mastering the warp engine, if you want to fly more than 300 light years between each other, even at the speed of light, it will take more than 300 years, such a long time, even if you finally fly over, the daylily will be cold.

The three golden routes were now firmly under the control of the Empire, and through the three routes, the Empire relied on the sale of arms and weapons to obtain countless wealth from the many civilizations above the main spiral arm, but the Empire was not dazzled by the current prosperity and huge wealth.

The Empire knew from top to bottom that the first battle in the Sirero system had only just begun, and that the war with the Kolov Empire was far from over, and it was not even a halftime break now.

In the void of the Sirero Galaxy, Li Fu arrived here on the Empire's latest technological bio-space battleship, and this time he was going to inspect the Empire's second-spiral arm defense system that had spent countless efforts to build.

Because the Kolov Empire is a civilization that can contact the center of the galaxy, the empire also concludes that the Kolov Empire can definitely buy warp engine space warships from the center of the galaxy, and it is obviously unreliable to rely on the three golden routes to defend against the attack of the Kolov Empire.

The Kolov Empire's warp engine warships can easily bypass the three routes and reach the subspiral arm without passing through the space-time current, and if there is a sneak attack on the Empire and go straight to the Centauri Galaxy, the central galaxy of the Empire, the Empire will not have time to defend at all.

Therefore, from the very beginning, the upper echelons of the empire formulated a plan to build a huge defense system in the void between the secondary spiral arm and the main spiral arm, and this defense system did not need to produce any attacks on the enemy, only needed to find the enemy's traces.

Once you can know that the enemy wants to enter the Empire by flying at warp speed, then the Empire can respond accordingly without being beaten by someone without knowing anything.

Although it is just to build a system that can detect the empire, this is definitely a huge project, there is a distance of 300 light years between the secondary and main spiral arms, 1500 light years long, and hundreds of light years thick, it is definitely not easy to build a surveillance and defense system in such a large area.

The spaceship that Li Fu was riding flew directly in the void at warp speed, and soon came from the Sirero galaxy to the void of the dark abyss between the secondary spiral arm and the main spiral arm, the origin of the dark abyss is because there are no stars in this area, and it is pitch black, so it is called the dark abyss.

"Your Majesty, because this Sirero system is the closest route to the other side of the starlight, it is also the first choice for the Kolov Empire's army to attack, and at present, we are also focusing on building a defense system near the Sirero route, and first complete the defense arrangement on the side of the Sirero route."

By Li Fu's side, Wu Gang, the person in charge of building the secondary spiral arm defense system, opened the virtual imaging and began to explain Li Fu in detail.

"Although it is only necessary to find warships flying at warp speed, the scope of the project is so wide that it is also very large."

"There is no distinction between up and down, left and right, front and back in the void of the universe, it is completely three-dimensional, so we must build a monitoring system on the entire scale."

"Your Majesty, please see, we have launched a lot of monitoring detectors into the void, this spherical detector, its diameter is only 10 meters, but there are various detection systems on it, energy detectors, space fluctuation detectors, gravitational wave detectors, etc., the monitoring detectors have the latest technology magnetic field batteries to provide energy, enough to support its intact operation for 500 years."

"In the dark abyss, we place one of these surveillance detectors every 100,000 kilometers, and every eight detectors form a three-dimensional space with a length, width and height of 100,000 light years, and everything within the three-dimensional space can be detected clearly."

"When countless such monitoring detectors are connected together, a large area of the void can be monitored, and then the void between the entire secondary spiral arm and the main spiral arm can be monitored step by step."

Wuhan Iron and Steel explained while demonstrating on the virtual imaging, a point represents a monitoring detector, countless such points are connected to each other, and soon, a three-dimensional network is constructed, forming a huge net sandwiched between the main and secondary spiral arms of the dark abyss here.

"The distance of 100,000 kilometers is the result of our strict calculations, and the general warp speed flight, if it is a relatively large number of space warships and spaceships flying at warp speed together, its fluctuation range is absolutely impossible to control within the range of 100,000 kilometers, even our empire's most advanced level 5 warp speed engine is unable to control the space fluctuation in such a small range."

"When the time comes, if the army of the Kolov Empire wants to enter the sub-spiral arm to sneak attack our empire through warp speed flight, it will be discovered by our monitoring system as soon as possible, and we only need to calculate the time, direction, and jump distance of their warp speed, and then we can come to a counter-sneak attack and catch them off guard."

Wu Gang looked more excited when he said this, and he thought that the defense system he had built might play a big role in future wars, and he would do so.

"How's it going?"

Li Fu nodded with satisfaction, he wanted to make the secondary spiral arm into an iron bucket, and building a monitoring system was only the first step, the first thing to do was to keep flies flying into the secondary spiral arm and not want to hide it from the eyes of the empire.

Originally, the second spiral arm has a natural geographical advantage, but this geographical advantage is of course absent in front of the warp engine, which is like the ground age, the steep terrain will be very weak after having an aircraft, and the enemy can easily use the aircraft to easily cross the defense line you have carefully constructed.

Now it's the same way, in the face of civilizations that have not mastered the warp engine, the empire can be very clear, only need to hold the three routes between the secondary and main arms, but when encountering the warp engine space battleship and spaceship, the enemy can directly reach the secondary arm through the dark abyss.

"The progress is very unsatisfactory at the moment, just the surveillance and defense system has been deployed within a few hundred light-years around the Sirero route, and even 10% of the total has not been completed, and we need more manpower, more resources, and more warp engine spacecraft to complete the deployment."

Wu Iron and Steel shook his head helplessly, the scope that needs to be arranged is too wide, and I don't know how many monitors need to be put on it alone.

"Only 10%? It's too slow, I will continue to send you more manpower, you don't have to worry about resources, as for the warp speed spaceship, I will also allocate as much as possible to you, and your side must complete the defense system as soon as possible, 50% in 5 years, and all in 10. ”

Li Fu frowned dissatisfiedly, the Kolov Empire didn't know when it would use force against the Empire again, but there was no doubt that the more prepared he was, the better, and the empire's army had not stopped expanding over the years, and what he was afraid of was the Kolov Empire's army that might come at any time.

"50% in 5 years, 100% in 10 years, Your Majesty, this task is simply impossible to complete in such a short period of time, the scope that needs to be arranged is too wide, even if you add 1 times the manpower to me, it is impossible to complete it in such a short time."

Wu Gang shook his head, and when he heard Li Fu's words, he was immediately under great pressure.

"If there is not enough manpower for 1 time, it will be 2 times, if it is not enough for 2 times, it will be 5 times, and if it is not enough for 5 times, it will be 10 times, in short, half of it must be completed in 5 years, and it will be completed in 10 years."

Li Fu's eyes flashed, compared to the pressure of Wuhan Iron and Steel, the pressure on Li Fu's shoulders is really great, the rise and fall of the empire, the future of the nation can not be careless at all, especially in the interstellar universe, there are too many powerful civilizations, too many.

"Yes!"

Hearing Li Fu's words, Wu Gang also nodded very decisively, Li Fu's will is the will of the empire, as long as the empire goes all out to do something, it can definitely be done.

"Now that we've done some of it, let's test it out and see if the system works."

Li Fu looked at the star map on the virtual imaging, and there was a large network around the Sirero route, which was an area that had been built and was covered by the monitoring system.

The spaceship that Li Fu was riding was accompanied by bursts of void fluctuations, and a space wormhole was opened, and the spaceship that looked like a shark was like a loach drilling into the space wormhole.

In the dark abyss somewhere between the main and secondary spiral arms, with bursts of spatial fluctuations, the spaceship that Li Fu was riding flew out of the space wormhole again.

"Buzz! Airplanes! ”

There were bursts of alarms on the spaceship, which was the alarm sound from the monitoring and defense system, Li Fu looked up, and found that there was an extra red dot in the network monitoring system, and the location was the location of his spaceship.