Entering the center of the earth is definitely good news, and it can even be said to be another milestone in the cooperation between the two sides, but no one is as happy as anyone imagined whether it is advancing the base or the earth, but is very worried about the situation of the center of the earth.

After all, it is the center of Ganymede, the core of the alien forces, and if the resistance group makes some accidents, the forward base will not have time to rescue at all.

To put it mildly, now we can only pin our hopes on the integrity of the Resistance!

However, so far, the cooperation between the two sides has not gone awry, and unless there is a major change, it is unlikely that the resistance group will change its mind.

From this day on, the human technical team officially settled in the center of the earth and carried out a comprehensive and detailed study of the planetary engine.

Much later, this day will go down in history as an important page in the history of human spaceflight, but when historical events occur, no one realizes that they are making history.

From this day on, the study of planetary engines became the top priority of the Northern Capital, and everyone paid attention to the small base in the center of the earth of Europa, the seeds had been planted, but no one knew if they could wait for the day when they would blossom and bear fruit.

One of the most important tasks of Ye Han every day is to keep in touch with the geocentric base, inquire about the situation and research progress of the base, and then send engineering vehicles to go every once in a while to send the supplies needed by the geocentric base, and at the same time retrieve the domestic garbage and written research data of the geocentric base, and maintain the communication relay equipment along the way.

As the saying goes, Ye Han is in the forward base, and he can get in touch with the latest research data every day, but the more he understands the situation in the center of the earth, the more he is stunned.

Ye Han had long known that Europa had more than one planetary engine, but he never expected that there were more than seventy planetary engines placed in the center of the earth, with the largest diameter of 97 kilometers and the smallest diameter of more than 30 kilometers.

According to the information provided by the resistance, most of the planetary engines have been damaged during the long interstellar voyage, and only a dozen of them are still in work today, and they are all models of more than 30 kilometers, and all other medium and large models have been scrapped.

In order to avoid long nights and dreams, the geocentric base immediately engaged in intense surveying and mapping work, planning to record the data of a good engine as it is, and talk about the rest later.

In the next period of time, Ye Han will receive a large number of surveying and mapping data every day, as well as a variety of alloy composition lists and other peripheral data, and he can also receive a few scrapped engine parts every three or five times.

These parts are picked up from scrapped engines, and the main purpose of sending them back to the forward base is to find out what is going on with these alloys, such as mechanical strength, melting point, boiling point, tensile or compressive strength, and so on.

The research team hopes to use this data to analyze the role of these parts in planetary engines.

At the beginning, it was still a small part that was picked up, and it didn't take long for it to be cut from the corners and corners of the large parts, in order to facilitate the researchers to cut the parts, Beiyuezhou also specially sent a batch of high-power laser cutting equipment.

Ye Han was very strange, could it be that the resistance organization just ignored it and casually cut the research group around?

After asking the geocenter base, I learned that the resistance group didn't care about those abandoned planetary engines at all, and it was no problem for the research team to do whatever they wanted, but the complete engine was different, even if it was just approaching, it had to be accompanied by aliens.

If it weren't for the size of the scrapped engines, the research team would have even wanted to get a few back.

The heart of the resistance organization is also too big, Ye Han can't help but be stunned, this is so special that the cub sells Ye Tian and is not distressed!

He couldn't help but ponder, if it was replaced by an alien nobleman, he was afraid that it would be impossible for humans to even see the scrapped planetary engine, let alone directly send someone over to study it at zero distance.

In order to speed up the research, the northern capital has successively sent three additional manpower, so that the number of permanent residents of the geocentric base has reached more than 60 people, which has greatly accelerated the progress of the mapping of planetary engines, not only small engines, but also those scrapped medium and large aircraft are also within the scope of surveying and mapping.

Although the level of the research group is not bad, but the technology contained in the planetary engine far exceeds the level of human science and technology, the study of the planetary engine with the existing technical strength of human beings, just like the study of modern precision machinery with the technology of the industrial revolution period, the possibility of immediate results is very small, the purpose of the research is mainly to take advantage of this rare opportunity to retain the data of the planetary engine, and then organize people to study slowly.

Moreover, although there is a huge gap between the models of planetary engines, the principle should be common, and the results of research on small machines may also be applied to medium and large machines, so Beidu believes that it is necessary to retain the data of medium and large machines.

With a large number of additional personnel and a large amount of equipment, the progress of the research work was astonishing, but after the surveying and mapping work was completed, the research progress came to a sharp standstill.

It's not that the research team doesn't want to continue, but they don't understand the principle of planetary engines at all, and they don't know where to start, so analyzing the metal composition has become the main work of the research group.

However, knowing the metal composition can only be said to have found a research direction, and if you want to manufacture an alloy, you must also carry out a large number of experiments, and after the experiment is successful, you must figure out the industrial production process, which is an astonishing amount of work, and even the state finance may not be able to afford it.

In order to figure out the process of these alloys, Beidu first coordinated with the resistance organization through negotiation channels, hoping to get the formula of some alloys, but unfortunately the resistance organization has no concept of this aspect at all, and the formula has never been heard of.

In desperation, Beidu could only start to organize manpower research, and successively established Beiyuezhou Special Metals Research Office, Qiongzhou Special Metals Research Center and Beidu Special Metals Research Institute.

Ye Han also had his own opinion on this matter, and he felt that it was better to ask for it from the resistance organization than to start from the alien nobles. Although half of the alien nobles on Europa Zero can't be found, their residences, personal belongings, and so on are still there, right? Maybe you'll find something useful in it.

Ye Han handed over his opinion, and the negotiation team also communicated with the resistance organization, but for some reason, the resistance group rejected this proposal very firmly, saying that the nobles took everything they could with them before leaving, and those who did not take it were destroyed by the members of the radical resistance group, so the resistance organization did not have anything related to the nobility in its hands.

Just when engine research was gradually at an impasse, biochemical research achieved its first results since the cooperation.