On July 14, 139, a search fleet of the Tianhu Army finally discovered the existence of the Xuanwu Fortress Group. They immediately reported to their superiors. The tiger furiously understood that its troops had finally discovered the position of the enemy's home star and ordered the entire army to move towards the Xuanwu Star Zone.

Sun Tiejian also ordered the entire coalition army to withdraw the fortress and rest. The Tianhu Army had discovered the location of the fortress group, and it was meaningless to continue fighting. Therefore, we should withdraw first and rest for a while, and then we can continue to fight after we have a good spirit. In the future, we will usher in a very difficult battle period. All the soldiers are mentally prepared for this.[]

In the Zhuque Star Zone, the Yanhuang tribesmen are stepping up their mining of various minerals, and putting a large amount of metal into the liquid metal layer of the fortress. Now, the thickness of the liquid metal layer of the fortress has reached forty kilometers, which has exceeded the original design. It originally could only withstand the attack of the 31st-level main gun, and now it can withstand the attack of the 33th-level main gun. In addition to the armor and defensive formations in the fortress, the level 36 attack can no longer harm the fortress. It can be said that the fortress is stronger than the original design.

The Tianji Fortress located at the bottom of the Big Dipper is the fortress on the front line. Sun Tiejian set up the commander-in-chief here. In the command room of the Tianji Fortress, Yang Tiehui introduced the Xuanwu Fortress group in detail to Sun Tiejian and a group of senior generals.

"The Xuanwu Fortress Group is the same size. The diameter of the fortress is forty kilometers, the liquid metal layer on the surface is forty kilometers, the total diameter reaches eighty kilometers, the total weight of the fortress reaches 256 million tons, the gravity on the surface is five or four times the gravity of the earth, and the internal gravity reaches ten times, which is also suitable for everyone to practice."

"The armor thickness of the fortress reaches ten kilometers, all of which have been refined through our clan's weapon refining methods. The defense is very strong. In addition, the various formations we installed on the armor and the liquid metal layer, the defense of the entire fortress reaches level 36. During the war, the Xuanwu formation is activated and the Xuanwu clone is summoned, and the defense can reach level 39."

"We used a space formation to expand the internal space to a thousand times, that is, it turned out to be only twenty kilometers in diameter, and we have expanded to two thousand kilometers. Inside, we have sufficient space to install warships, various living facilities and other energy systems, and even various production lines, so there is absolutely no need to worry about space."

"The energy system of the fortress is divided into two parts. One part is its own element-gathering array. These element-gathering regions can continuously absorb the free energy in the universe and become part of the fortress' energy. The other part is the hydrogen and oxygen generator installed at the core of the fortress. Although the power of the hydrogen and oxygen generator is not too high, we have installed a large number and can be recycled. The power per hour is as high as 100 billion kilowatt-hours. Usually, the excess energy is stored in the element-gathering array. After the element-gathering array is fully stored, the extra part will be used to transform it into crystal stones and stored. With these energy reserves, it will not be a problem even if the enemy attacks continuously for several months."

"The firepower of the fortress is mainly two aspects. One is the main gun. Each fortress has twenty main guns. These main guns are not exposed normally. When they need to be used, they use the formation to separate the liquid metal layer and expose the main gun passage to attack the enemy. The power of these twenty main guns can only reach level 35, distributed on the surface of the fortress. They are basically installed on the side of the enemy's attack. After our calculations, there are no dead corners in the shooting. The launch frequency of the main gun is one shot per minute, which is already our limit. It will take time for us to study stronger main guns. As for the frequency of launch, our research is already a bit obvious, and I believe it can be solved within fifty years. In addition, there are three thousand sub-cannons with a power of level 32, which are mainly used to deal with small warships in the enemy with weaker defense."

"Because our army does not require various exits, there is no exit at all in our fortress. Everyone needs to jump out by themselves when entering and leaving. This will avoid the enemy's use of the gates of the fortress to attack and reduce the risk of the fortress being breached. Of course, doing so will cause some trouble for our fortress to enter and exit. However, based on the overall consideration, we still adopt this design."

…………

After listening to Yang Tiehui's introduction, Sun Tiejian said, "Tiehui, thank you for your hard work over the years." "What are you saying? It's hard for you to block the enemy's search over the years? I just moved my mouth, what's the hard work? But, Third Brother, it's up to you to the next one."

Sun Tiejian nodded and said, "The enemy's arrival this time should be the Fifth Front Army. It will not be too strong. With their current strength, they will not be able to capture our fortress. However, I will not dare to take over the next time. Also, Tiehui, you must buy time and study more weapons to kill the enemy on a large scale. Faced with the huge number of enemy troops, we can't rely on the main artillery."

Yang Tiehui smiled bitterly and nodded, "I understand what my third brother said, but it is not easy to study large-scale destructive weapons. Our army's current strength has reached a bottleneck. If we can break through the past, our strength will naturally be higher. If we cannot break through the past, we will probably have to stand still. However, this bottleneck is not easy to break through, and it requires us to break through all aspects. Therefore, I can't say how much time it will take, it may be one or two hundred years, or one or two thousand years. Everything depends on our efforts. However, this breakthrough is not just about hard work."

Indeed, the development of the Yanhuang clan is too fast now. One of the most important reasons is that it has obtained some of the technologies of the Tianhu Empire. With these advanced technologies, combined with the knowledge of the Yanhuang clan formation and cultivation system, the two have developed amazing strength. However, the Yanhuang clan has not been revived for a long time, and a lot of knowledge cannot keep up. Many scientific and technological knowledge only knows the truth but does not know why. Therefore, it is not so easy to go further. It takes a long time to supplement and improve all aspects of knowledge and lay a foundation that is already empty. Therefore, Yang Tiehui estimated that the two hundred years will be fast. If it is slower, one or two thousand years will be unsure, and even three or five thousand years will be unsure. There is no way to false science and technology problems.

Sun Tiejian said: "I understand, I will leave everything to you." "Don't worry, Brother Third, I will work hard and strive to be able to develop better weapons as soon as possible." "Okay, I am fully supportive of this. If you want people, I will give them, and I will give them things. In short, work hard."

Zhang Zeshan also told Sun Tiejian about the development situation in the rear: "In the past 30 years, our tribe has grown to more than 5 million, and the gods have also increased by more than 4 million people. The population of other tribes has also increased by a little. However, the number is not large, and the witch tribe is the smallest, and it has only increased by 5,000 people. Overall, the population is developing relatively fast, and these young people are progressing. It is estimated that in another fifty years, they will be able to go to the battlefield, and then they will be able to add a lot of new forces to us."

"In terms of logistics construction, we have invested heavily in production, new warships are being produced continuously, a large number of minerals have been mined, and the personnel of the Academy of Sciences are constantly making various magic weapons and pills. The current reserves are enough for us to use for more than ten years."

"We have no problems with other facilities such as education. The children are growing well. We can give them the best education and living standards. There is no need to worry about this."

Sun Tiejian patted Zhang Zeshan on the shoulder and said with a smile: "I am certainly relieved to Zeshan when doing things, but with too many people, we will have problems in the future. Zeshan, you have to find a way to find a new star area to accommodate our population. If the fortress is broken, it will not be so easy for us to fight guerrilla warfare in the future. Please consider this."

Of course, it is easy to obtain back-sources and sufficient logistical support when there is too much population, but too much population can easily form a burden. Once the population reaches more than one trillion, it is not so easy to fight guerrilla warfare. Therefore, Sun Tiejian reminded Zhang Zeshan.

There is absolutely no line of defense in this universe that cannot be broken. Everyone understands this. Xuanwu Fortress is indeed very powerful. However, even the most powerful fortress will be broken one day, which may be a year later, a hundred or even a thousand years later. Therefore, it is absolutely nothing wrong to prepare early. Otherwise, it would be too late to wait until the fortress is broken before preparing to move.

Zhang Zeshan nodded and said, "The third brother is right to remind me, I will pay attention." "Haha, you guys, don't worry, third brother, I'll go and prepare. We want to welcome guests, we can't be without any preparation. That will lose the tradition of hospitality in the Yanhuang clan." Everyone laughed and prepared. After fighting for so many years, they should vent their traits.

On September 12, 139, the vanguard of the Fifth Front Army arrived at a 90 million kilometers in front of Xuanwu Fortress. However, this vanguard was very unlucky, which caught the Yanhuang tribe off guard at the beginning, and they were in great trouble.

Theoretically speaking, if the enemy is 90 million kilometers away from the enemy, this distance cannot be attacked even if the enemy wants to attack. It should be a very safe area, because even if the enemy attacks, it will take more than ten hours before the main gun attack will reach the attack distance of the main gun. Therefore, the vanguard of the Tianhu Army was also careless and believed that there was no danger. Therefore, during the jumping process, even the force field cover was only opened to half of its strength.
Chapter completed!