Since Zhuge Wushuang and Lu Yingying discovered the message of the Martians, there is no secret in the entire Martian city, and in the following month, a large number of troops have been continuously invested in the underground city, on the one hand, to speed up the process of exterminating mutated Martian creatures, on the other hand, it is also hoped that in the process of exterminating these mutant monsters, the run-in of the reorganized troops will be accelerated, and a combatable division will be created as soon as possible. Pen, fun, and www.biquge.info

The resources of the Martian city are still quite abundant, not to mention anything else, just those metal resources are quite a lot. Although the fleet has also collected a large number of metal resources in the asteroid belt, most of them are relatively low-grade metals, most of which are common metals in the universe such as iron and nickel, and as for other metals, the stock is quite poor. This is probably the reason why the Martians collected it once in advance. Just look at how scarce energy spar deposits are in the solar system. And the entire underground city of Mars is made of metal, and even the road surface is made of metal, which shows how extravagant the Martians were at that time. Although they are all low-grade alloys, the fleet is not eye-catching at all now, but if a little recycling can get a large number of pure metal and rare metal resources, such a work can still be done, and by the way, the size of the fleet can be expanded, and some escort frigates and destroyers can be added.

A large number of swallowing vines were sown into the underground cities of the Martians, and in less than a week, all the originally tall underground buildings were swallowed up, turned into batches of metal resources that were continuously transported back to the fleet, and quickly turned into batches of regular parts through the smelting center, which were transported to the space dock for assembly under the operation of artificial intelligence, and in a few months a new batch of frigates and destroyers will be offline. The productivity of the fleet now is not at all comparable to that of the original Earth. The power of artificial intelligence can only be highlighted in the large-scale construction, the computing power is almost limitless, countless industrial robots in the large production line and assembly workshop are working day and night, the efficiency is not the general efficiency, the scene inside the dock is changing every day, the keel was just laid yesterday, and the cabin inside the assembly is already being assembled when it passes by today, and it will take a look after a week or two, and the shell may have been installed. The entire battleship was built as quickly as a giant assembly toy.

It is not the number of warships that limits the size of the fleet today, but the size of the population. The number of humans is too small. Sixty-five billion people, which sounds like a lot, but this is only confined to the earth, and once they leave the earth, they are pitifully few. The various battle positions of the battleship, the command centers at all levels, the logistics center, the maintenance center, and so on, add up to the basic operation personnel of a large frigate 10 kilometers long, and the basic operating personnel must be several hundred or even thousands, and this is still a standing personnel, and in wartime, considering the casualties of the fleet, there must be substitutes. And that's just the operators of the battleship itself, and even more if you add the landing force. The population of the fleet, excluding the old, weak, women and children, is not much in total, and the number of warships piloted by extracting technical arms from it is even more insufficient. Moreover, the fleet is also equipped with aerospace aircraft carriers, which are equipped with thousands of aerospace fighters, and the pilots required for this are technical arms, which are not at all comparable to those armies that have become an army in three months, and these pilots have to be recruited from among the pilots of various countries. How many fighter pilots are there on the entire planet? Moreover, the technology is uneven, and if it is strictly screened, it may not be enough to equip two aerospace aircraft carriers, and at this point, it may not be enough to exterminate the larger space pirates. Therefore, we can only improve our technology, implement the elite army plan, and use the weapons of the fifth and sixth levels of civilization to fight against the massive enemy, and to achieve this, we need to cherish the mineral resources. Otherwise, building those fourth- and fifth-level civilization warships is simply to deliver food to others. It was because of the lack of cherishing resources that the fleet came up with such a lame freak warship as adding a sixth-level civilization weapon to a fifth-tier battleship. Now that I have found so many precious resources, of course, I have made use of them to improve the scientific and technological level of the warship in an all-round way. It is expected that this harvest will be enough for the current small number of main legions to be reequipped with sixth-level civilization warships.

The most precious thing in the Martian city is those biological crystals, according to Natalie, there are no such biological crystals in the proven civilizations of the galaxy, this is simply a kind of creature. Even the crystal seeds of the silicon crystal family can only be sprinkled into the energy crystal ore to absorb the surrounding low-grade energy crystals and grow into high-grade energy crystals, which is just an enrichment and improvement of the quality of the original energy mineral deposits. The biocrystals in the Martian city are like the modified plants of the greenskins, which can absorb all resources and convert them into high-quality energy for storage, and through experiments, it is found that it will not take long to get a larger and energy-rich high-quality purple crystal tree by placing the crystals of the biocrystals near the stars. With it, the fleet simply has at its disposal a high-quality, inexhaustible source of energy. Later, during the voyage, as long as there are stars, the fleet can carry out rapid replenishment. This biocrystals have been collected by fleets as a strategic resource, and it is forbidden for anyone to sell crystal seeds to other races. However, the processed ones are still okay. Crystals that have been machined have no growth properties other than the property of storing energy.

The collection of biological crystals is mainly operated by robots, and all the crystals from them have been collected and handed over to Chen Peilin for safekeeping, and only when they need to be used will they apply to receive them from Chen Peilin. Moreover, there are strict image materials in the process of use, and there is a special person responsible for each step, which can be said to be not strict. There are also many mature biological crystals harvested by the fleet. Martian cities are huge, and the crystal jungle is full of Martian cities. As a result, the mountains of various colored crystals piled up made the managers in charge of storage helpless, and in the end, Chen Peilin stepped forward and put all the crystals into the folding space to solve this problem. In the future, the fleet will only distribute finished crystals to ordinary people, and the crystal tree will fade out of people's sight.

The harvest season is always full of joy, and with the efforts of the whole fleet, the empty and huge Martian base ended up with only an empty underground cavern, not even a large metal block left, and some people who visit here again in the future may only think that this is just a huge underground cavern. Who would have thought that there would ever be an underground city here?