The collection point of the Gubora excavation site is next to the railroad tracks in the middle of the mine. Fortunately, there is no need to carry the ore out of the bottom of the mine, and the ore can be transported up by rails. Otherwise, just this distance, Liu Xin will really doubt that anyone is willing to mine, if you want to carry the ore from the mine to the empty square outside, you need to climb out of the mine at least, and the road in the middle is at least a kilometer away, then it is really not a job that people can do.

However, even if it is a job that can be done by those people, it is possible for different people to try some challenges of different difficulty, such as choosing a pit that is far away from the rails, although the distance is much shorter, but at least you need to carry it to the side of the rails.

Liu Xin, who received a mine pickaxe and a mine basket, didn't care about the sky slowly getting dark, and plunged into the mine hole.

As soon as he entered the mine, Liu Xin saw that a torch was inserted on the surrounding walls at intervals, illuminating the originally dark mine. A large area of abandoned rubble was piled up haphazardly around, and for a long distance, there were such large and small rubble. Perhaps because of the long time of stamping, the ground in the tunnel is relatively flat, and there are no potholes and difficult to walk in the phenomenon.

As Liu Xin continued to advance, the torches around him pulled Liu Xin's figure out a shadow that danced with the light of the torch in the hole, and the shadow kept changing its position and moving forward with Liu Xin

There was a faint clanging sound in front, which was the sound of the ore pickaxe hitting the ore, Liu Xin continued to walk towards the cave along the railroad tracks, walking hundreds of meters, and felt that Liu Xin stopped only when he felt it. The sound of pickaxes striking stones echoed in the cavern, and the echo effect in the cavern made the sounds stand far and seem close.

Liu Xin looked around, he was half a miner and a forging master, and the distinction of minerals was enough to pass, and after only a while, Liu Xin found that the ores around him could only be regarded as medium to low quality. If you want to earn 5 gold coins in 2 months, it is difficult to rely on these low-quality ores, and you must find a piece of high-quality ore.

Looking at the potholes that began to appear around him, Liu Xin slowly closed his eyes, ready to rely on his intuition to choose a pit path, Liu Xin still believed in his intuition.

Following his own consciousness, Liu Xin entered a tunnel, and there were no torches in this fork-like tunnel. Those torches are only found on the main road with rails, and there are no torches on such branch lines, after all, no one has the resources to put torches in all the tunnels.

Liu Xin had to turn around and pick up a torch from the main road and continue to walk towards the fork in the road.

After several forks in the road diverted and winded, Liu Xin came to the place where he intuitively felt, a circular pit with a diameter of about 30 meters, compared with the pit with a diameter of only about two meters, it was much larger.

Liu Xin couldn't help but carry the torch and looked around, and muttered while observing: "The quality of the ore here has not improved much, even worse than the outside, what's going on?" ”

Liu Xin didn't quite believe that his intuition would make such a mistake, but after observing the four directions, the quality of the ore here can be said to be inferior, very inferior. The quality of each ore is divided into 5 grades from low to high in the same grade, inferior, low, intermediate, high, special and perfect, and all ores are distinguished by impurities in the ore. In a piece of ore, regardless of its size, if it contains more than 90% of the total amount of ore, it cannot be counted as a certain ore, if it exceeds 80% to 90%, it is counted as inferior ore, if it contains impurities between 50% and 80%, it is called low ore, if it contains impurities between 10% and 50%, it is called medium ore, and if it contains impurities between 1% and 10%, it is called high ore. Most of the impurities contained in the ore here have reached about 90%, and there are even a lot of ores that cannot be called ore.

Any blacksmith will use a minimum of above the medium grade, and if it is below the medium, it will take a lot of time to purify the ore, because of the different contents, the amount of lower ore required to extract the higher ore is also different. But there is also a general ratio, about 10:1, for example, ten pieces of lower ore can be refined into one medium ore of the same size, and 10 pieces of medium ore can be refined into one piece of higher ore.

As for the two grades above the highest, the two grades of special and perfect, which are called special ores with impurity content of less than 1%. As for the perfect quality ore, it has not yet appeared, and perhaps it should be said that Liu Xin has not seen it yet.

The legendary perfect quality ore does not have a trace of impurities, because all impurities have been removed, and the element content in the ore has reached the maximum, and then a certain part of it will produce some kind of mutation, or should it be said that some kind of evolution, leap towards a higher grade ore. And the part that does not mutate becomes impurities, and over time, this evolution will continue to increase until all impurities become a higher level of perfect ore, and evolve again to a higher level, and continue to evolve. After reaching a certain level, because there are not enough conditions to continue evolving, it begins to collapse, completely reverts to the most basic ore, and starts a new round of evolution again, and so on and repeats and cycles indefinitely.

Therefore, it can be said that all inferior ores are perfect quality ores, because they are all changed from low-grade perfect ores, for example, after the sand reaches perfect quality, it will evolve elements such as iron and copper, and sand becomes impurities, if it is according to sand, then sand is special, and copper and silver are impurities. After the copper reaches perfection, it will evolve into bronze or silver, and the copper will become an impurity, and the relative copper can also be special. However, the direction of evolution is related to a series of factors such as the surrounding environment, temperature, climate, time, etc., so the different evolutionary speed makes the types of ores more and more, and the various effects are also different. Even in the same piece of ore, there can be an infinite number of impurities in it, all due to the different evolutionary speeds, and miners can only locate the type of ore according to the most abundant element.

Countless ores and their circulatory systems thus make up the entire ore sphere, and they all evolved from the lowest level of basic elements, and after reaching a certain level, they began to collapse and start evolving again, so that the best ores of their kind were actually only at the top level.

The climate and geography of this Gubora Cave have led to the evolution of most of the ore here towards copper, and this has become a copper vein. The inferior ores in front of us are either due to other factors that have slowed down the evolution by half a beat, or there are special circumstances, where higher-grade ores are brewing, so copper ore and some other sandy soils are considered impurities.

So looking at this mine with a diameter of almost 30 meters, Liu Xin believes that the previous miner must have thought the same way, and even multiple miners have this idea. Like gamblers, they keep trying, keep digging, either find high-grade ore and get rich, or nothing, the bamboo basket is empty, until they feel disappointed after a period of time before giving up. Therefore, a pit with a diameter of 30 meters was dug up, and no new higher-grade ore was found, and finally it was abandoned, believing that there was no high-grade ore here.

At this moment, Liu Xin also fell into a choice, whether to believe in the experience of the previous miners, there is no high-grade ore here, or to firmly believe in his intuition.

Just after thinking about it, Liu Xin made a decision, he chose to trust his intuition, his intuition helped him countless times, let himself escape from death, and even got enough benefits, I believe that those miners before did not have such a strong intuition.

Standing in the middle of this hole, Liu Xin closed his eyes again and guided himself forward with his intuition. Liu Xin slowly walked around in this huge hole, one foot deep and one foot shallow, until he reached the place where he felt and then opened his eyes.

"Here?" Seeing that he had returned to the position more than a meter away in the passage that had just entered the pit, Liu Xin's eyes lit up slightly, if it was really here, those miners in front of him were all deceived by the first, maybe it should be said that they were misled by the first.

The first miner to discover this special place may have been careless and did not pay attention to the surrounding situation at all times, so he overdug himself, and by the time he noticed that the surrounding ore had begun to change, it was too late, and he had passed many meters. Then he began to dig around, and the passage he came over was subconsciously ignored by him, after all, when he came over, he dug a pit of about two meters, and he didn't find anything, so he ignored it.

After digging for a while, he realized that he had lost the bet and went to another place in discouragement. The second miner who entered also found a problem, and saw that the other party had already started to dig a part, and then gave up, so he firmly believed in his own judgment, and hit the other party for not having perseverance and perseverance, and began to continue digging.

As the miners who lost their bets left in frustration, the pit became bigger and bigger, and the sinkhole that made all gamblers red-eyed became deeper and deeper, and basically all the miners who entered here were pitted.

And there are many smart people among them, after digging for a while, they guessed whether the person in front of them had dug their heads, so they dug back in reverse, but they didn't stick to it. But these smart people are a minority after all, so they still haven't dug up the high-grade ores that have already rushed over, and those ores are still a meter away in the tunnel.

"Then, dig up!" Liu Xin looked at the pit in front of him with some excitement and began to wave his mine pickaxe. (To be continued.) )