Xu Mo understood what the old Rapp meant, not that the world management organization would not save him when he saw death, but that the world management body simply did not have the strength to take action, not to mention the challenges faced by the Doraemon world itself, the existence of the star key not only protected the peace of the Doraemon world, but also limited its strength output. Pen, fun, and www.biquge.info

The history that has happened cannot be changed, even if you go back to that historical node and forcibly obtain a different result, the history that has happened still has not changed, but a tributary has branched off on the long river of time, and another possible future path has emerged, which is determined by the strong fault tolerance rate of the timeline.

The backbone world line is different, after the star key is constructed, the backbone world line, which is the anchor reference of space-time coordinates, is a coherent, concrete, and clear historical line, which is the most important, valuable, and indestructible one for human beings in the intricate timeline, and the fault tolerance rate is much worse than time itself.

A certain degree of change, as long as the remediation is appropriate, it doesn't matter, for example, a historical figure who exists as an important historical node, hangs up due to an accident or other reasons, gets a stand-in, or forcibly resurrects him or something, it doesn't matter, as long as he is allowed to complete the historical events that should be done step by step.

If the backbone world line is greatly damaged or changed, it is a big problem, which may lead to the collapse of this backbone world line, and then affect the space-time anchor of the entire star key system, thus causing a hole in the world defense line.

At the same time, the backbone world line also involves complex causal lines.

Take Nobita as an example, as an important historical node, not only because of his countless adventures with Doraemon, which created an opportunity for the unity of various civilizations in the entire world, but also because his descendants also have an important historical relationship - Nobita's great-grandson Nobishi Shu, who also has a very important weight in the backbone world line record of the world management organization.

Therefore, in addition to protecting Nobita's life, the world management agency and other departments must even escort his marriage, otherwise, Shishu will not be able to be born, which is also a big trouble that affects the stability of the backbone world line.

If it is in the normal timeline, Nobita will have countless possible marriage choices because of the circumstances of his life, but on the main world line, due to the shrinking of the fault tolerance rate, his marriage partners are also limited to two, that is, Shizuka and Fat Tiger's sister, and the option of Fat Tiger's sister is a relatively bad future, which will also affect the development of the world line, which is also the reason why the elderly Nobita and others finally decided to send Doraemon to Nobita in exchange for a better future.

At this time, on the main world line, Nobita's choice is actually only Shizuka, and the maintenance of the causal line is relatively clear, simple and convenient.

However, with the intervention of the space-time hub, the space-time anomaly was opened in Nobita's room, which not only affected Clem, almost made the Doraemon world lose the legendary astronomer, but also had a high probability that Nobita's causal line had other options, such as Lori Little Hill, the elf of Muluo Village.

That's right, due to his curiosity and love for the cute elf Lori, Nobita has a chance to choose Little Hill, which also shakes the cause and effect of the backbone world line, and it is also the reason why the world management agency closed Nobita's room to the space-time gate of Koya Star, built a chrono fortress outside the space-time anomaly, and issued an entry restriction order to Xu Mo.

All exchanges and exchanges in other worlds may have an impact on the backbone world line, which is the stabilizer of the star key system and the weakness of the defense system, and is the object of key protection by the space-time management bureau and the world management agency.

This effectively limits the outward motivation of the Doraemon world, forcing the emergence of a limited policy of "closing the country to the world", which is implemented not by the world government, but by the world governing body.

In other words, while protecting the Doraemon world, the Star Key also forced the Doraemon world into some kind of limited seclusion, which is a double-edged sword.

This is also the fundamental reason why Doraemon World urgently needs information from other worlds, but has to ask Xu Mo.

Xu Mo frowned a little: "No wonder you can't send troops, if a large number of soldiers are involved in the cause and effect of other worlds, it is likely to change quantitatively into qualitative changes, causing turbulence in the time and space of your own world......"

The old Rapp said: "There is always a balance in this world, what you get, you always have to pay the corresponding price, you also get the star key system now, in the process of operation, you will naturally slowly discover it." ”

Xu Mo groaned, no wonder Qiongye didn't think much of the star key system of the Doraemon world, it turned out to have such a huge flaw, fortunately, after Qiongye recovered, he was able to improve this system, and many of the supporting facilities of the star key are now very useful, he doesn't need to choke on food, especially the invaders of the new world can control the elements of the world, in order to counter the other party, it is impossible to put ready-made equipment without it.

"I see, but the space-time hub is indeed in a critical state right now, and needs your help, and it can't send a regular army, so the intelligent robot force should be able to, right? I need a strong intelligent robot unit, as well as other unmanned combat units, as well as other weapons support. ”

When the space-time hub city was designed, the industrial zone had a considerable degree of capacity design, but a bunch of messy emergencies affected the assembly progress, just like the star key system, it has not been in place, and the current resource points of the space-time hub are mainly concentrated in the resource field of the ancient demon forest, and the mining degree is limited, which also affects the supply of raw materials for the automatic production line that has been in place.

The world management agency is different, the system is complete, the reserves are abundant, the production capacity is also very amazing, and it is impossible to directly send troops to participate in the battle, in the current situation, providing logistics support is undoubtedly the best choice, the elderly Rapp also feels that Xu Mo and others are in trouble, but they are not pulling out a dime, it is not a matter, and they are full of promises to Xu Mo's request, and promises that if the output of the world management agency is not enough to meet the needs of Xu Mo's side, the world government at other points in time can also be mobilized to cooperate, It must meet the war needs of the space-time hub.

Seeing that the goal was achieved, Xu Mo did not delay, and immediately rushed back to the space-time hub.

On the way, he thought about it, whether it is an intelligent robot or an unmanned unit, although it is easy to use, but this war is probably not enough to rely on these, and he has to find more insurance methods, by the way...... Is it possible to get rid of some guys who are not very reassured? Like, goblins or something.