Kaichi followed the guide's gaze and shone the light through.

As far as the light could see, the front suddenly sank, and Jia Yi stepped forward and saw a mine hall more than 10 meters high. Under the light of Jiayi's miserable white magic, the stones on the roof of the cave showed a variety of mixed colors such as yellow, blue, and purple.

"This is?" asked Raman, the captain of the Scarlet Rose.

The guide said: "This is the mine hall, it turned out to be the richest place for iron ore, we have been mining here for a long time, after mining here, we dug two more branch roads to both sides, the middle one is going down, and the two next two opened two smaller deposits out, originally prepared to dig through all the way, but before digging through, there was a problem." ”

"You've encountered monsters here?"

"No, the monster is still down there, but this is where the ore goes wrong, there are a lot of ores in this mine hall, we were very happy to dig at the time, but I didn't expect that the quality of the ore we dug out behind us is getting worse and worse. Then I continued to dig down, and it didn't get any better. The guide's voice was a little low, with some disappointment.

Jia listened one by one, went down the stairs next to him to the bottom of the mine hall, and then went along the wall to check the ore inside. Seeing Jia Yi go, the rest of the people also went down together, and the two mineral experts commanded the rest of the people to start mining, and at the same time touched the ore veins and explored the direction of the ore veins.

Kaichi changed the mode of his light technique, changing from a flashlight to an electric light, and at the same time increasing the supply of magic power, illuminating the entire mine hall. He walked in front of the two mineral experts, took a piece of ore, and the other party glanced at Jia Yi sideways, "snorted" and didn't say much.

Kaichi didn't care either, holding the stone, oh no, the ore. Judging from the appearance, there is nothing peculiar about these ores, perhaps because Jia Yi knows less about ores. However, this does not affect Kaichi's analysis of ores, he also has magic. Jia Yi put all the analysis spells he knew and improvised on this ore, and finally got some results.

The ore seems to have a high sulfur content, which is why the ore is brittle. In order to make alchemy explosives, he still knows a lot about triacids, and to make sulfuric acid, sulfur or sulfurous ores are indispensable.

However, although it was confirmed that iron ore contains sulfur, it is not known why. It is impossible that these iron ores originally contained such a high content of sulfur, otherwise some of the ores above would not contain sulfur, but the bottom would contain sulfur. Although otherworldly magic is not very scientific in the first place, some basic logic still needs to be explained, if there is no external force involved.

Everyone tacitly didn't say anything about the test results, so Jia Yi didn't know what conclusions others had reached.

After exploring and inspecting the mine hall, Kaichi and the rest of the group continued downward, preparing to detect the monster in the place where it was found, while the mine experts and guides would stay with a small group of people who were guarding them, and continue to investigate the quality of the iron ore here, trying to find out the cause and solution.

Jiayi has some ideas about the desulfurization of ores, although he doesn't know much about crushing, calcination, magnetic separation, and flotation, but he has also heard of it, but the requirements for industrialization are very high, and he has to find a way to operate Jiayi. But why the ore in the upper layer does not contain sulfur and there is sulfur in the lower layer, Jiayi is a little puzzled.

After settling the men to stay, Kaichi came to the cave that continued down, this mine was even smaller, and he had to bend down to walk in the mine, otherwise he would be knocked by the rocks above his head if he was not careful. He took out his newly made detection array disk, which was a plate-sized metal disc, with an ultrasonic emitter like a pig's nose on his head, and an erected disc behind the pig's nose, with a white circle in the middle of the disk, surrounded by a pair of bat wings, and felt a little strange in aesthetics.

It was actually a sound receiver, and the erected part could be lowered and placed on top of the disc like a lid, some of which looked like an oversized pocket watch. This takes up less space, but the sound wave is received outside the lid.

This detection array disk was made by Jia Yixin, and he didn't even choose a name, and now he is only called the detection array disk. This is also the confidence that he dares to come to the mine to explore alone.

Originally, the reception of sound waves was not refined enough, but now after he has improved it, he has used the eardrum of the big-eared demon bat to strengthen the sound reception part, which has reached or even exceeded Jiayi's original idea. And he also found that the wings of the demon bat can receive magic fluctuations, and find places or creatures with a relatively high concentration of magic around them, but this effect Jia Yi has just been installed, and it is not very easy to use, every time he detects, the direction with the highest magic power will always point to Jia Yi himself, just because Jia Yi is closer.

As soon as Jia Yi activated the array disk, the invisible sound of the two ears was launched towards the inside of the mine, and if anyone could hear these ultrasonic waves, then they would hear a continuous sound of "click" and "click".

Then a light appeared on Jiayi's array plate, and a winding cave appeared in front of everyone's eyes, like a small worm.

Jiayi looked at the bottom of the cave shown above the array, there was a noticeable void there, and what was behind the void did not come back, indicating that there should be a hole there, or something there was absorbing the sound waves. However, Jiayi knew that it was a hollow, because as mentioned earlier, when those miners were mining, they dug a hole in the ground and encountered monsters.

The rest of the people watched Jiayi's operation and gathered around.

"This is..."

"Topographic map of the mine?"

The two captains asked and agreed, and said their guesses.

Jia nodded and replied, "Yes, this is a newly made detector that can detect the terrain in front of you, and if something is moving, you can also see it." ”

Originally, because the reflected waves of the flesh and the rest of the objects are different, it should be theoretically possible to distinguish them, but Jiayi hasn't found a way yet, and now the imaging is good, but it's still not possible to distinguish the material of the object.

And this detection circle also has a small mechanism, this thing can detect solid and liquid, such as underwater and underground, and can not be displayed, directly into the user's mind, only he knows.

After reading too many novels about murder and treasure grabbing, Jiayi's sense of secrecy is still very strong.

"It's really a good thing. Bloomer couldn't stop envious, with such a thing, safety is much more guaranteed.

The group rested in the mine hall and ate some water, and then Rahman was in the front row, Jia Yi was second, followed by Bloomer and the others. Kaichi also gave Raman a Frost Armor to increase his defense.

However, Jiayi, who was following Raman, couldn't help but add a warm spell to himself, this is not a game, but there is no such thing as teaming up to avoid injury.

The group stumbled along the mine. Probably thinking of digging down as soon as possible to see if there is any better quality ore below, the hole along this deposit is not too wide, and there are still ores on both sides that have not been dug up. As a result, the mine cave is not only low, but there will be many stones sticking down from the top of the head, if it weren't for Jiayi's lighting technique, plus Raman brought armor, I don't know how many bags would be knocked out of my head along the way.

After a few more miles, we finally reached the bottom of the cavern, and not far away, a swarthy cave with a swarthy entrance that could accommodate a past, as if it wanted to devour everything that came close.