Zhang Xuan stood on the black rocky road, looking at the eighteen-meter towers in front of him, frowned and silent.

"Uncle Master, what did you find?"

The white-robed guest walked to Zhang Xuan and asked in a low voice.

Zhang Xuan shook his head slightly, "Have you noticed that the scene here has been described in some books?"

"Book?"

The white-robed guest looked puzzled. He thought for a while, then shook his head, "Uncle Master, I think I am well-read in ancient history and have never seen such a description."

"Of course not in ancient history, what I said is in the book."

Zhang Xuan said, "In the story of Shushan, there is a demon-locking tower, and a demon-suppressing sword on the top of the tower to suppress the evil spirits in the tower."

"Uncle Master, what you are talking about is a fairy tale novel!"

The white-robed guest had a speechless expression, "How can the things in the novel be put into reality? You don't think that all the demons and ghosts are locked in these towers, right?"

"You can't take the things in the novel seriously, but this tower is definitely something to be used for detention. Come with me."

Zhang Xuan raised his steps and walked forward.

The white-robed guest followed Zhang Xuan with confusion. After walking out for dozens of meters, Zhang Xuan suddenly stopped. The position he was standing at was in the center of two high towers.

“Look at this.”

Zhang Xuan paused and looked at the ground.

The white-robed guest's eyes followed, and a small piece of locking chain was printed into the white-robed guest's eyes.

The white-robed guest squatted down and observed the chain on the ground. The chain was less than twenty centimeters long, and one person had forearm as wide as his forearm, and there were broken marks on both sides. When the white-robed guest saw the broken part of the chain, his pupils suddenly shrank, "This..."                                                                                     �

"The chain is broken, not cut off by a sharp weapon, but by being pulled."

Zhang Xuan said lightly, "The material of the chain is unknown. Even though it has been buried here for so many years, it is still harder than steel."

The white-robed guest picked up the chain and found that the chain was particularly heavy, less than twenty centimeters long, only sixty kilograms.

"Come with me again."

Zhang Xuan waved his hand at the white-robed guest, then jumped straight to the top of the tower.

The white-robed guest came up from behind, and the two of them had already reached the top of the tower.

"Look at this."

Zhang Xuan reached out to the spire of the tower. At the top of the spire, there was an iron ring used to bind chains. At this moment, only a small part of the chain was left. The other side of the chain, just like the one Zhang Xuan and the others found on the ground, were forcibly torn.

Zhang Xuan continued to speak: "I just observed ten towers. Each one is tied up with chains, and there is a thin mark on the surface of the tower top. This is the mark formed by the chains being covered by wind and rain all facing one direction, which means..."                                                                                                 

Before Zhang Xuan finished speaking, the white-robed guest continued, "It was just that the chain was forcibly torn off."

"right."

Zhang Xuan nodded.

"But what is this for?"

The white-robed guest's face was even more confusing, "Every spire was connected with chains, and the chain was torn off by someone, but the tower had not been damaged yet."

"Instead of thinking about this, it's better to think about another question."

Zhang Xuan stood on the top of the tower and looked into the distance. It was pitch black. Even if Zhang Xuan was not sure what was left in the distance, it was like a new world.

"What?"

The white-robed guest asked subconsciously.

"I just said that what happened to the chain marks on the top of the tower are formed by the wind and rain for many years, so that a city that was originally on the ground could be saved for hundreds of meters underground. I think you might as well start from this aspect instead of guessing those clueless things."

Zhang Xuan spoke.

The white-robed guest's eyes lit up, "Yes, Uncle Master, why didn't I think of this? If I could figure out why this city was buried underground, I would definitely find useful clues, which is better than guessing like this."

"You didn't expect that you just saw such an unknown place and were just stubborn."

Zhang Xuan patted the white-robed guest on the shoulder.

The white-robed guest opened his mouth and was about to say something when he heard a burst of exclamation from below.

"careful!"

"retreat!"

The master of this exclamation came from the younger generations from the Ninth Bureau.

Zhang Xuan and the white-robed guest's faces changed, and they jumped down almost at the same time. The dungeon was too mysterious, and no one knew what was here and what kind of danger was hidden here.

When Zhang Xuan and the white-robed guest landed on the ground and ran a turn, they saw a member of the Ninth Bureau wearing an isolation suit flying backwards and slamming towards the ground. When he was about to fall to the ground, the white-robed guest reached out and took him down.

The white-robed guest saw that the member of the Ninth Bureau had blood on his mouth and a slender hole appeared on his isolation suit.

"What's going on!"

The white-robed guest asked with a frown.

"Instructor, there are enemies."

The member of the Ninth Bureau spoke pale.

"enemy?"

The white-robed guest was suddenly shocked. There was actually someone in this underground city! “You find a way to contact the above, I’ll go and have a look first.”

The white-robed guest said something and turned into a phantom and rushed forward.

Zhang Xuan did not immediately follow the white-robed guest. He looked at the gap in the isolation suit of the member of the Ninth Bureau. There were some copper residues on the edge of the gap.

"It's copper again?"

Zhang Xuan's eyebrows were slightly frowned. He always felt something was wrong. Recently, he had seen too many such things with copper chips, in the Loulan Sand Sea, in this No. 4 Underground Palace.

Zhang Xuan observed the architectural model and materials of this dungeon. It was impossible for him to develop to such a low-end as the Bronze Age. But the broken shield and the sharp weapon to cut through the isolation suits of the Nine Bureau members were all related to copper.

Zhang Xuan walked forward a few steps and saw the figure of the white-robed guest.

At this time, the white-robed guest was attacking with the other four people in the Ninth Bureau.

The White-Board Guest is the spokesperson of the Nine Bureaus, and his strength should not be underestimated. He also studied under Bai Jiangnan. He is one of the few masters. Although he did not hold a silver spear this time, his strength was a few points worse than his heyday, but not everyone can deal with it.

But at this moment, the White-Board Guest joined forces with four members of the Ninth Bureau to deal with the shadow in front of him, but he was unable to take it down for a long time. The other party ignored the White-Board Guest's anger and frequently smashed his fists at the White-Board Guest.

"Who are you!"

The white-robed guest dodged the other party's fist and shouted loudly.

Facing the white-robed guest's question, the other party seemed to have not heard it, and continued to punch, each punch hitting the fatal point on the white-robed guest's body.
Chapter completed!