Black Iron City, a historic city, the city wall, extremely towering, spread to the end of the line of sight, still out of sight, it can be seen that the area of this Black Iron City, how big is it.

Lively, spectacular.

Entering the Black Iron City, Ling Yun looked at it, and when he saw the various buildings full of historical memories, he also exhaled deeply, such a huge city is like a small country.

On the road that extends in all directions, people come and go, and it looks extremely lively, and this kind of popularity is much stronger than other cities that Ling Yun has seen.

The shouts from all around were endless, and Su Ling'er's eyes were also looking left and right, looking left and right, as if she was interested in everything.

"Lingyun, look, that wood carving is so cute......"

"Lingyun look, that dress looks so good, isn't it very suitable for me to wear it. ”

"Ling Yun, that noodle shop looks good, it smells good, do you want to try it." ”

"Lingyun ......"

After a while, Ling Yun was disturbed by the girl's chattering words, and finally he simply turned off his divine sense and stopped paying attention to Su Ling'er.

Being idle is also idle, Ling Yun spent some spirit stones, and also got a lot of information about Black Iron City from the hawkers on the street.

According to the information obtained from the hawkers, the number of large and small forces in this Black Iron City is extremely large and complicated, and the conflicts of interest involved are also very complicated.

Among the many forces, there are four directions, which can be called the master of the Black Iron City, and among these four forces, Ling Yun is more familiar with one place, that is the city lord's mansion in their mouths before, and the other three major forces, Ling Yun has never heard of, they are called the Human Sword Gate, the Blood Hall and the Xiao Gate.

Of course, the headquarters of the three major forces are not located here, it is only a branch of the three major forces, but around this, that kind of strength is not comparable to the rest of the forces, therefore, the pattern of this black iron city is also four-legged, and most of the resources in the city are also divided by these four forces.

Ling Yun couldn't help but sigh, just with one branch, he was able to have such a status in Black Iron City, the strength of these major forces was indeed quite terrifying, I am afraid that compared to the Ziyang Sect, they were not much weaker.

Ling Yun was not interested in the conflict of interests of several major forces, and the purpose of this trip was also to go to the underground exchange to see if he could find something valuable.

The underground exchange does not belong to the four major forces, but to a large family, the Leng family.

The Leng family may not be as strong as the four major forces, but the Leng family is extremely large, and the number of clansmen is extremely large, far exceeding the sum of any major forces, which also makes the Leng family have a huge network of relationships.

And only the Leng family, which has a huge network, can recruit talents from all over the world to create such an underground exchange to meet the needs of people from all walks of life.

Moreover, the things in the underground exchange are good, and if you are lucky, you may be able to find a very precious treasure.

The underground exchange is located in the south of the Black Iron City, where the Leng family is located in the Black Iron City.

In the trade fair, there are a lot of good things, and the transactions in it are extremely simple and convenient, and the four major forces also acquiesce to this existence, after all, it is convenient for everyone.

The underground exchange presided over by the Leng family of the Black Iron City is quite famous in the nearby area, not only the people of the Black Iron City like to trade here and exchange some things they need, even if it is some nearby cities, they will often come here.

When Ling Yun told Su Linger that he was going to the underground exchange, Su Linger was also extremely excited and very interested in it.

Originally, Ling Yun wanted to go alone, but under the latter's strong opposition, he reluctantly agreed to Su Ling'er's request and took her to the underground exchange with him.

When Ling Yun and Su Ling'er came to the underground exchange, looking at the black crowd inside and the boiling sound rising to the sky, the former couldn't help but sigh, this Leng family's network is indeed huge, and it can attract so many traders.

And this underground exchange is indeed the most influential exchange in the area near Black Iron City, and this flow of people is simply terrifying.

"Let's go, but don't get me in trouble. Ling Yun said to Su Ling'er.

He was worried about Su Ling'er, who had such an eccentric personality and was likely to get him into trouble.

"Hmph, is Miss Ben that kind of person, don't worry, go quickly, I can't wait......"

Su Ling'er protested dissatisfiedly, and then glanced at this underground exchange with some peculiar eyes, she has always been locked up at home, she has never been to this kind of place since she was a child, after all, she is a seventeen-year-old girl, no matter what, there is always some curiosity and expectation for this kind of place.

As soon as they entered the underground exchange, Ling Yun and Su Ling'er also felt that there was a lot of strong aura around them, obviously, none of the stall owners in the underground exchange were simple people.

Ling Yun was not surprised by this, to say that they didn't have a few pounds and a few taels, it was obviously impossible to be convincing.

In the underground exchange, the dazzling array of items is dazzling, although the underground exchange area is very large, but in that terrifying flow of people, it still seems a little crowded.

Ling Yun had only walked far before he was already sweating profusely, and he didn't want to continue.

However, Su Ling'er is completely different, without the slightest tired look, and her interest is extremely high, and her beautiful face becomes red because of excitement, and she is charming, like a yellow sparrow's silver bell laughter, which attracts a lot of attention, and then after seeing the girl with a beautiful posture and skin like snow, those eyes are full of obsession and amazement.

Ling Yun couldn't help but shake his head and smile when he compared the phenomenon, Su Ling'er was indeed an extremely beautiful woman, and it was very normal to attract so many eyes.

Ignoring the girl's "mad" state, Ling Yun's gaze slowly swept over some of the messy items on the stall, glancing at the items and quotations in them.

Millennial Cordyceps, which has the effect of nourishing the mind and improving the quality of the elixir, is an important elixir for alchemy, and the specific effect varies from person to person, and the price is 300,000 spirit stones.

Purple Star Furnace, excavated by tomb robbers, is an indispensable item for alchemists, and the price is 800,000 lower grade spirit stones.

Tiger Power Pill, made of the blood of the fourth-order demon beast Earth Splitting Tiger, has the effect of skyrocketing power in a short time, the higher the user's martial arts cultivation, the lower the effect it plays, it is the best elixir to burst out of combat power in an instant, and the price is 400,000 spirit stones.

Flowing water swordsmanship, Xuanjie lower grade swordsmanship......

............

Ling Yun crossed these, but he did see a lot of things recorded in rare books in some places, and some people were not literate, and sold some thousand-year-old elixirs as ordinary rare items, but even so, Ling Yun was not interested in this, after all, he was not an alchemist, and it was useless to buy it.

After a few steps forward, I saw several hardcover men standing in the back row of the stall, standing in a row, with slaves engraved in different positions on the bulging muscles, and there were several cages next to them, holding some young girls, and the girls looked extremely frightened one by one, and they did not dare to look at the crowd.

Ling Yun originally wanted to ignore these directly, but he stopped under Su Ling'er's protests, took out a part of the lower grade spirit stones and bought these poor girls, and then let them go.

After dealing with it, Ling Yun continued to push forward, and finally stopped under a small stall.

In the stall, there is an old man wearing Taoist clothes, his dry palms look like he should be nearly sixty years old, but his sitting posture is extremely steady, and his martial arts cultivation has also reached the middle stage of the Xuanlun Realm, and his body exudes a powerful momentum, which makes people dare not look down on this old man in the slightest.

When the old man saw the arrival of Ling Yun and Su Linger, he also touched his goatee, and said with a smile: "This little brother and little girl, the old man's stall is all boutique, do you like it?" ”

Ling Yun also spoke, casually looked around the stall and touched it, and after walking for a distance, he saw something good, a simple and dilapidated scroll, revealing a hint of mystery, Ling Yun's eyes swept to the scroll intentionally or unintentionally.

Thunder light boxing, Xuanjie upper grade boxing method......

The rest of the introductions Ling Yun didn't see clearly, just a few words on the Xuan Rank top, which made Ling Yun's eyes light up, this grade, even if it was placed in the Ziyang Sect, was a top-notch martial art.

However, Ling Yun's gaze did not stay on this Xuan-level high-grade martial art for too long, but shifted his gaze to the inconspicuous place of the stall, where there was an iron box with a slightly dull color, and in the iron box, there was a black tissue paper.

When Ling Yun saw the black paper in his sight, he could feel that the stone tablet in his body that had not reacted for a long time seemed to fluctuate slightly at this moment.

The fluctuation was extremely subtle, but it was still perceptible to him, and immediately his pupils were imperceptibly slightly condensed, and his heart couldn't help but surge.

The stele had a total of three reactions, the first time was when Ling Yun entered the pale space, the second time was a black paper he saw at the auction, and the third time was the black paper he saw at this time, and he was surprised to find that this black paper was very similar to the one he had purchased before, except for the different shades of color.

The next moment, he hesitated slightly, just took a few steps, and under the old man's gaze, he held the iron box in his hand, and then raised his head and smiled at the old Taoist priest.

"Sir, how much does this tin box cost?"

The old man in the Taoist robe, obviously stunned by Ling Yun's words, immediately narrowed his eyes, looked at Ling Yun, and said with a light smile: "Oh, little brother, why are you interested in it." ”

"I think this is interesting and I want to study it. ”

Ling Yun smiled helplessly, his face did not show anything abnormal, he naturally knew that the people who dared to set up stalls in the underground exchange, although they didn't even know what they were from somewhere, they were very shrewd.

After all, in their eyes, anything present can become a treasure.

There has never been an example of what was garbage before, but then it became a treasure.

The old man in the Taoist robe narrowed his eyes slightly at Ling Yun's reply, obviously not convinced by Ling Yun's words, and immediately looked at the rusty iron box again.

After more than ten seconds, his eyes were taken back, every thing in this stall was studied by him for an unknown amount of time, and he naturally would not take out valuable things and sell them.

Of course, the same is true of the iron box, he has also gone through many researches, and even invited people to see them, but in the end nothing has been researched.

"Does the old gentleman know what this thing is?"

While the old man in the Dao robe was thinking, Ling Yun also asked lightly.

He naturally saw the old man's suspicions, and immediately took the initiative to open his mouth and threw the question to him.

"Hehe, it's funny, little friend, if I knew what kind of treasure this is, maybe you wouldn't have seen it. The old man in the robe squinted, touched his goatee and said.

"I don't know how much it costs? This thing looks interesting, so I'll go back and study it." Ling Yun asked lightly.

The old man in the Dao robe paused, thought about it for a while, and then said, "Ten million spirit stones." ”

Hearing this, Ling Yun's heart was suddenly shocked.