Xiao Yu's current flagship is the Shanghai, because the original flagship, the central computer of the Beijing was seriously damaged by the logical lock attack of the water droplet. Xiao Yu did not plan to repair the central computer of the Beijing, but planned to directly equip the Beijing with this new generation of computers after the development of the ternary computer.

At the same time, Xiao Yu is still deducing the opponent's level of science and technology and the way of war.

After a lot of calculations, Xiao Yu believes that the symbol that divides the second-level civilization and the third-level civilization should be the protective shield technology. Protective shield technology already exists in Xiao Yu's theory, and Xiao Yu is confident that it will be realized within 30 years, which means that protective shield technology is no longer far away from Xiao Yu. As long as Xiao Yu has a deeper understanding of the nature of high-energy photons, Xiao Yu will be able to develop a primary energy shield immediately.

Of course, in order to enter practical application, it is necessary to solve a series of problems such as energy system, maintenance system, material process and so on.

In the logbook of the water droplet, it divides itself into a second-level peak civilization, which is enough to explain the problem.

"Protective shield technology, simply put, is to bind high-energy photons through a strong magnetic field, forming a protective layer on the surface of the spacecraft, within the range of the force field, the temperature of the protective layer will reach hundreds of millions of degrees, which can vaporize any close entity, as well as defend against various forms of energy attacks. This shows that the high-velocity machine guns, when faced with the energy shield, basically lose their effectiveness. Because of the way the entity physically attacks, the energy it carries is too small. So...... I'm going to get a big upgrade to my ship, weapon system. ”

To this end, Xiao Yu has conducted a lot of research and developed a new type of weapon, which is still based on a high-velocity machine gun, but Xiao Yu installed an ultra-miniature nuclear bomb in it, and the moment he got close to the opponent's spacecraft, the nuclear bomb exploded instantly, and a high temperature of up to 100 million degrees broke out in a small range of a few cubic decimeters. This kind of bullet is cheap to build, and in Xiao Yu's inference, it will be extremely efficient in dissipating the energy of the opponent's spaceship's protective shield.

The nuclear bomb will be used on a large scale as Xiao Yu's conventional weapon, in addition, Xiao Yu has also constructed medium-sized weapons based on high-yield hydrogen bombs and high-energy laser cannons, which will be the main attack to destroy the opponent's spacecraft in an interstellar war.

The high-end weapons deployed by Xiao Yu are energy weapons that have obtained manufacturing methods from the lizardman civilization. During this time, Xiao Yu made many improvements to these energy weapons, making them more powerful and firing faster. In addition to this, Xiao Yu has also developed a small energy weapon, which is equipped with this weapon for all township and village-level spaceships.

Xiao Yu also developed a new type of weapon, which is similar to a laser cannon, but this weapon is not equipped on a spaceship, but operates on the four orbits of the Celestial Garden, powered by stellar light energy.

This kind of weapon, there is a giant solar sail with an area of several thousand square meters, this giant solar sail will provide sufficient power for this weapon, and in the event of war, the energy provided by the solar sail will be converted into a high-energy beam, which will be launched and irradiated on the enemy spacecraft, directly causing damage to it.

Although the attack power and flexibility of this solar sail weapon are a little lower, its advantage is that it does not require Xiao Yu to directly control it, and its large number does not require additional energy. Xiao Yu had produced hundreds of thousands of such weapons, all of which were arranged on a track that was only 10 million kilometers away from Tianyuan 4. Among Xiao Yu's weapon, Shiyan, the killing range of this solar sail weapon reached an astonishing 200 million kilometers. That is to say, before the Lucca Civilization fleet breaks through the Tianyuan B defense line and reaches the asteroid belt, it will first face the attack of the solar sail weapon.

Under the pressure of terrifying survival, Xiao Yu's construction speed has reached an astonishing level.

A year after the Water Drop Incident, Xiao Yu created a new city-level spaceship. This spaceship was named "Xingtai" by Xiao Yu after his hometown.

The Xingtai has no less attack power and protection than the four spaceships such as the Beijing, and even surpasses it. This is mainly due to Xiao Yu's scientific and technological development during this time.

The four large particle colliders around the Tianyuan have also been repaired as before, and a large number of collisions are being carried out intensively. These shiyans cannot bring about the improvement of science and technology in the short term, but these shiyan data will support Xiao Yu's scientific development for thousands of years after escaping from the Tianyuan Four Galaxy.

Xiao Yu is making all-round and all-round preparations. Of course, all these preparations are premised on victory in the war against the Lucca civilization.

The research on the shell material of the water droplet has been intensively carried out. After two years of research, Xiao Yu still has not been able to grasp the specific parameters of this material. But Xiao Yu had another gain.

That is, if this material is fired in the same way as an energy cannon, it will burst out ten times as powerful as a conventional energy cannon. Xiao Yu has a total of about a thousand water droplet shell fragments, which means that Xiao Yu will be able to fire a thousand times with this energy level energy cannon.

Within five years, with the addition of the original four municipal-level spaceships, Xiao Yu had a total of ten municipal-level spaceships. These precious fragments of the shell of water droplets were evenly equipped on the ten city-level spaceships, and each city-level spaceship received a hundred fragments.

Tianyuan A and Tianyuan B are two interstellar fortresses, respectively equipped with two municipal-level spacecraft, namely Xingtai, Handan, Tangshan, and Langfang, and at the asteroid belt, it is equipped with a municipal-level spacecraft, which is Baoding. At the base camp of Tianyuan A, a total of five city-level spaceships were equipped, in addition to the four spaceships at the beginning, there was also a Shijiazhuang.

These ten city-level spaceships constitute Xiao Yu's highest-end combat power.

The construction of the interstellar fortresses of Celestial Garden C and Celestial Garden B has also been completed, and it has been greatly improved compared to before the Water Drop event. Originally, there were a total of eight armed satellites, but now the number has been increased to fourteen, six at Tianyuan C and eight at Tianyuan B. In addition to these fourteen armed satellites, Xiao Yu also installed a large number of space-based turrets in orbit around these two planets, and the overall combat effectiveness of the interstellar fortress has made a great leap.

The research and development of ternary computers has been successfully completed, and Xiao Yu has built a total of ten ternary supercomputers, which are equipped on ten city-level spacecraft. Xiao Yu's computing power has been increased tenfold, which represents a more powerful fleet control. Although Xiao Yu can only stay on one, this total of ten spaceships undoubtedly provides Xiao Yu with more back roads. After the destruction of one city-level spaceship, Xiao Yu will have the opportunity to escape to another city-level spaceship to avoid the fate of death.

Preparations have been going on for five years. In fact, if there is enough time, Xiao Yu will continue to create new spaceships and continue to improve his combat power. However, time is running out.

After Xiao Yu built 130,000 solar sail weapons, one of Xiao Yu's satellites in the four star systems of Tianyuan detected a strange fluctuation.

Xiao Yu saw that in an orbit 45 billion kilometers away from Tianyuan, a strange-shaped spaceship suddenly appeared. This spaceship was about 1,300 meters long, a little larger than Xiao Yu's city-level spaceship.

The ship is irregularly shaped and dark green throughout. The moment it appeared, it did not accelerate away, but began to defend around a point in the void, and at this point in the void, new ships kept popping up.

One, two, ten, hundred...... A full 7,000 ships appeared.

These spaceships are large and small, the largest is larger than the city-level spacecraft, and the smallest is smaller than the village-level spacecraft. Of these, there are five of the largest ships. Xiao Yu, who saw this scene through the monitoring satellite, deduced that it should be the flagship spaceship of the Lucca civilization.

After all seven thousand ships appeared, they began to speed up. Xiao Yu saw that on the surface of these spaceships, a dark green light suddenly appeared, like a cover, enveloping the entire hull. After a while, Xiao Yu suddenly lost the image data of these spaceships.

"They destroyed my satellite." Xiao Yu knew it in his heart.

Along the way, Xiao Yu never saw the images of these spaceships again. But through the location of the destroyed satellites, Xiao Yu can still clearly deduce the location of these spaceships at the moment.

"They are approaching at a speed of 2,300 kilometers per second. It is expected to reach the Tianyuan C orbit in two months. Here, it will be my first battlefield. ”

"There's no doubt that they have shield technology, but I don't know what other weapons they have beyond my imagination besides shield technology. In my deduction, high-energy laser weapons and super energy weapons are on the same level as shield technology, and they should have both. For the rest, material annihilation weapons, proton-neutron decay weapons, should not be there yet. In other words, their ships have an average combat power between three and ten times higher than mine. ”

"It is worthy of being a third-level civilization, and the combat effectiveness of a single spaceship with the same volume and quality can be so much higher than mine." After making a slight estimate, Xiao Yu was secretly surprised in his heart.

"But! They only have 5,000 ships, and I have 100,000 ships! I have twenty times more ships than they do! Add to that the Star Fortresses of Celestial Garden C and Celestial Garden, as well as the Solar Sail Weapon, the Asteroid Belt Weapon, and I will have a good chance of winning! ”

"You want to catch me, and then keep me in captivity, you can dream about it." Xiao Yu gritted his teeth and thought, manipulating all the spaceships in the four star systems of Tianyuan, ready for battle.

The big war is coming!