Lin Ruo followed Ying Zixu's guidance and walked forward, he thought that this place would go somewhere, but after arriving, he was instantly dumbfounded.

There is no prosperity here, there is no sign of life, no matter how you look at it, this is a dead land.

White, gray, blue, all kinds of colors are slightly white blended together, here is a chaotic stone hill slope, flying white fly ash, like a white bone cemetery, such as a sorrowful cry, and like a hundred ghosts rampant sad feeling, so that Lin Ruo can't help but feel cold.

The people inside hunched their waists and held pickaxes, and they fell down one after another, and with each lift they lifted, the white powder would rise to the sky.

He and Ying Zixu could hear the voices inside, even, like a desperate wail.

This is a group of enslaved people, they are wearing rag clothes, and some people don't even have them at all, white fly ash falls on their bodies, and those red eyes are bloodshot, but not a single tear has fallen.

Someone fell on the ground, only to hear a snap, a black shadow swept through the air, and fell directly on the person who fell to the ground, and then the skin opened and the blood flowed.

Collided with the flying ash in the sky, it was just a little spark at first, and then exploded in an instant, but before the explosion passed, the fine sand in the air that came from nowhere directly drowned the person who had just been killed on the ground.

All this is just a few seconds of happening, and the movement caused by these few seconds is amazing, but the others seem to have not seen it, and are doing their own thing, they may have become accustomed to it, even numb, their eyes are empty, and there is no desire to survive.

"Saltpeter." Lin Ruo recognized at a glance what these white fly ashes were, especially the big explosion caused just now, which made him sure that this was a saltpeter mining site.

However, seeing such a saltpeter mining site here, I couldn't help but be stunned, such a huge amount of saltpeter, even if it is easy to destroy a country.

Although saltpeter has not yet become truly popular in Bluestar, many people still don't know about it, but the research institute of Xingsha Academy has long studied this thing.

Before Lin Ruo was admitted to Xingsha Academy, his master, Teacher Yu Jia, accidentally got a little saltpeter from a street vendor.

At first, he just thought it was strange that the thing was sealed in one place, so he asked the vendor why he had sealed a stone so tightly that it didn't seem precious.

The vendor laughed and told his master, Yu Jia, that this thing could not be dismantled, and said that his name was saltpeter, and that it would burn when it touched water.

His teacher was stunned for a moment, a little unconvinced, and the peddler had long known that his master Yu Jia would not believe it, opened a hole, poured a little powder everywhere, and poured it directly into the water cup, and the water cup burned instantly.

The water in the cup is real water and is not mixed with anything, so it only means that what the vendor said is true.

Then his master Yu Jia bought such a small piece of saltpeter at a high price.

Lin Ruo has been in contact with saltpeter since he was in the sixth grade, and he even put saltpeter into a small sealed vessel, and then used the spirit master's formation as an engine, so that after breaking free from his hands, it will explode at a long distance, and the power of the explosion depends on the amount of saltpeter inside, not the size of the bee vessel.

He told his master Yu Jia about his research, and then his master Yu Jia never let him touch saltpeter again.

But he knew that saltpeter bombs were circulating in the army of the Star Sand Empire, and even spread to other continents.

Lin Ruo fell into his own contemplation and woke up slightly, when he came in just now, he looked at the person in front of him, but he didn't notice the illusion around him.

White is the color of saltpeter, gray is the color left over from nature, and blue is the color of the sea.

He turned his head to look around him, and there was only a piece of glass blocking the saltpeter mine from the sea.

I don't know what this piece of glass is made of, it actually blocks the air pressure of the sea, there is no damage on the glass, the ground that connects the glass has become black, and there are several layers, it seems that there are traces of saltpeter after spontaneous combustion, obviously this piece of glass is not new.

However, this glass does not completely block the contact between the sea water and saltpeter, there is no vegetation or fish outside, and there will be bubbles rising up from time to time, and there will be some slight explosions that will shake the inside.

"Saltpeter, what is it?" After all, the main place where saltpeter mainly appears is only on the battlefield, Ying Zixu didn't know what saltpeter was, but looking at Lin Ruo's nervous appearance, he also understood that this was definitely not a good thing, so he asked.

"Something that can make ordinary people kill a life master." Lin Ruo said slowly.

It can make ordinary people kill the life master.

Ying Zixu couldn't believe it, the ability of the life master can be said to be unparalleled, how could an ordinary person defeat the life master, he was joking.

He glanced at Lin Ruo suspiciously, but thinking of what he had done in Star Moon City, he didn't say anything about this argument.

Lin Ruo will not care about Ying Zixu's troubles, he has never been to a mine that mines saltpeter, but he has overheard his master Yu Jia mention that there is no place in the Xingsha Empire where saltpeter is found, and the mining of saltpeter is also extremely difficult.

The process of mining saltpeter is definitely not something that anyone wants to do, so the higher authorities will enslave some lowly poor people to mine for them, and the poor people are not worth much in their eyes, no matter how much they die.

But since he came here, his ears have begun to ring, and the voice that called for help to him some time ago has become clearer.

"Help me, save me......" The voice kept ringing in his ears.

In a trance, he seemed to see an old man in front of him, leaning on his back, and the calluses on his hands seemed to be broken and raw, raw and broken, and now he was knocking on the saltpeter mine, but his head turned around, as if he saw them, and his mouth opened and closed, closed and opened.

Then a man in a protective suit pushed him and told him to hurry up and get to work.

However, the shape of the old man's mouth, Lin Ruo seemed to be the note that lingered in his ears.

Just when he wanted to move forward, when he pushed the old man away, Ying Zixu pulled him with a solemn face: "Go, go back, someone is coming from above." ”

So Lin Ruo could only leave with his best.