"Lord of the Underworld?" Gu Xinyu's tone trembled a little and asked knowingly, as if this could alleviate the indescribable sense of fear when he was watched by a terrifying being not long ago.

And Lin Feng is much calmer, for Lin Feng, this feeling of being watched by a high-level existence, he doesn't seem to know how many times he has experienced it.

From being almost wiped out by the attention of the guardians of the Holy Land when he was weak, to now he has entered the category of second-level civilization, and his strength in reasoning is not bad, but there are still higher-level existences, which attract the attention of these existences, and they still have to admit it.

Gu Xinyu said again, the trembling in his tone had not disappeared, "The underworld... The Lord... Why would they notice us two ants, even if we are friends with the tombstone, we shouldn't be! ”

Lin Feng looked at the gate of time and space that had been opened, and at this moment, the origin-class warships and various transport ships that had already received Lin Feng's information had begun to pass through the gate of time and space.

"It's my fault, opening the door of time and space in someone else's territory, the master must see what is going on, fortunately we are friends of the tombstone, and this lord of the underworld did not embarrass us." Lin Feng shrugged and said.

"Okay, you stand aside, don't get in the way of me directing the engineering robots to work." Lin Feng looked at Gu Xinyu, who was staying on the side and blocking the road, and pushed down.

"Oh, good!" Gu Xinyu didn't seem to have recovered from the fear just now, but when Lin Feng said this, he nodded hurriedly, and then walked to a remote place, which would not hinder the engineering robots working back and forth in the mining area at this moment.

And Lin Feng didn't pay too much attention to Gu Xinyu, after all, Gu Xinyu was also the controller of the main god space, and it would be good to come in a few more times for this kind of thing.

"Yes, yes, this way, this way. There is also a temporary base building built here, and the mineral research laboratory is built next to the temporary base...... "Although there are managers who help Lin Feng manage it, since Lin Feng himself is on site, he wants to build this bone condensation vein mining area according to himself.

"Lin Feng, there's nothing to do with me here, I'll go back first!" When Lin Feng was in full swing directing the engineering robots to build all kinds of buildings according to his own ideas, Gu Xinyu, who should have recovered from the shadow of fear, came to Lin Feng's side and whispered to Lin Feng.

"Well, you go back first! I'll go back when things are arranged here, but I won't be able to leave your Tower of Eternity. Lin Feng said.

"Okay, I look forward to the next time we meet, you and I will be able to control ourselves." After Gu Xinyu dropped a sentence, he opened a one-person space-time door beside Lin Fengfeng, and then stepped in without looking back. It seems that Gu Xinyu was stimulated, and the degree was not small.

This time Gu Xinyu opened the door of time and space, and the gaze of the Lord of the Underworld did not appear, and it seemed that the existence of the two had been acquiesced.

Three days later.

This area of bone coagulation veins has been transformed from a barren area into a very large mineral mining base.

From time to time, there are Yuanqi-class warships patrolling the sky, of course, there are not many of them, but there is no problem in ensuring the safety of this mining base.

On the ground, countless mining buildings dedicated to the mining of bone coagulation ore are arranged in an orderly manner on the originally barren ground.

Countless ostocosis mining robots travel to and from the mining complex.

In the past three days, the scientific researchers dispatched by Lin Feng have conducted a very thorough research and analysis of the bone coagulation.

came up with a result that made Lin Feng very happy, that is, the alloy made of bone coagulation doped with other metals would gain memory, immortality, and very terrifying hardness and so on.

Even these researchers even did an experiment, that is, after smashing a war robot made of an alloy doped with bone condensate doped with other high-grade metals, they were able to rely on the memory immortality of the alloy itself to autonomously restore it into a war robot after ten hours.

This is the bunker, when Lin Feng knew this, the whole person felt that he was surrounded by an indescribable joy, and the immortal civilization had begun to advance towards the immortality that was being made.

You must know that even today's nanorobotic insects can't achieve this effect, nanorobotic insects need to constantly devour various substances to be able to repair the damaged places, and the alloy doped with bone coagulation automatically has the ability to repair itself, and the effect does not seem to be as good as nanorobotic insects.

Of course, Lin Feng could not abolish the research on nanomanichodes because of the coagulation minerals, but thought that if the materials used to make the nanometronics were also doped with these osteocolytes...... Lin Feng was excited as long as he thought about it.

However, the meal has to be eaten one bite at a time, and these have been thrown by Lin Feng to the scientific researchers to solve.

Bone coagulation ore has such an important role, doesn't Han Bairong know? Don't the other creatures of the underworld know about it?

In fact, the role of bone coagulation ore is not well known, but anyone who knows a little bit can know a little, but the underworld creatures are not like the immortal civilization, all of them are mechanical life, although these bone coagulation ores are rare ores, but for the underworld creatures, it is a little more important, and it is only an auxiliary mineral that can be mixed with some personal weapons when forging some personal weapons.

This is also cheaper Lin Feng, originally Lin Feng thought that Han Bairong might just take a relatively rare mining area to make up for himself.

Of course, Lin Feng actually didn't know how rare and important the ** chaos species he had captured, it might be the only blood realm chaos species in the underworld that had been captured alive so far.

As the daughter of the Lord of the Underworld, Han Bairong is still a little arrogant, and the interests of her greedy friends are not something she can do, so she is ready to choose this bone condensation mine, which has a very big effect on the mechanical civilization, as compensation.

Another three days passed.

Lin Feng looked at the hundreds of transport ships that had been filled with bone condensate ore, and sighed at the strength of the Immortal Civilization's current industrial power, and the terrifying efficiency of mining minerals.

Then, Lin Feng opened the gate of time and space again, allowing these fully loaded transport ships to sail through the gate of time and space and enter the spaceport in the space of the mechanical source realm.

Just yesterday, Lin Feng estimated the storage capacity of this bone condensation vein area, where it will take thirty years, and it will only take ten years Lin Feng can pat his chest to ensure that all the bone coagulation ore in this bone condensate vein will be mined, and there is no waste residue left, and the industrial strength is strong, so confident.

Stepping through the gate of time and space, Lin Feng returned to the mechanical source realm, looking at the spaceport that was lively at the moment because of the arrival of more than 100 transport ships, Lin Feng also relaxed, and only when he stayed in his old nest mechanical source realm, Lin Feng could relax himself so much.