"Can you hear me now?" Zhang Yu asked with concern.

When the young man saw Zhang Yu's mouth move, he said, "What did you say?"

This is the same as Zhang Yu before.

Zhang Yu knew that she must not hear it, so he could only wait quietly. The young man began to press his ears constantly. After a while, she said, "I finally understand why the person who delivered the meal was deaf and blind."

"Why?" Zhang Yu asked.

"Just this formation, it is absolutely impossible for a normal person to walk over. Unless this person is a deaf person and can't hear anything." The young man said gritting his teeth.

"That's right..." Zhang Yu took a deep breath and said helplessly: "Then we can't even get deaf in order to get out..."

"This..." The young man showed a look of frustration. As Zhang Yu said, he couldn't make himself deaf.

She just leaned against the wall and stood up straight, but stopped leaning. Because of her frustration at this moment, her back unconsciously leaned against the stone wall again.

There was a light "bang" sound, and the back hit the stone wall.

She didn't feel anything, but Zhang Yu, who was standing opposite her, immediately realized something was wrong and said, "The wall behind you seems to be empty."

"Empty!" After hearing this, the young man immediately became energetic. She hurriedly turned around and patted the stone wall with her hand.

"Bang bang bang..." The sound of the stone wall was very thick, without any hole.

The young man said, "It doesn't seem empty?"

"There is a hidden mechanism here, which most people can't hear, but I can hear it!" Zhang Yu said affirmatively.

"If there is an organ... then you can take a look..." The young man immediately let the side.

Zhang Yu walked to the stone wall, raised his hand and tapped it a few more times.

The sound inside is very real, and it does not seem empty. If it were the case before, Zhang Yu would not be able to tell it. However, since he learned the art of mechanism, he could already tell whether there is a mechanism from the subtle sound.

He then tapped the surrounding area to determine whether there was any difference in the sound. Soon, Zhang Yu was able to be completely sure that there was indeed a problem here.

Zhang Yu made another fire-gathering talisman, which allowed him to clearly look at the stone wall. The stone wall was not particularly smooth, with bulges and sags on it. Zhang Yu's hand either knocked on the stone wall, or pressed the bulges and sags on it, feeling the sound of the stone wall making.

Soon, Zhang Yu discovered that when his fingers pressed the raised or sunken position with force, a faint sound of pulleys would be made in the stone wall. Although it was very slight, it could not be hidden from Zhang Yu's ears. Zhang Yu was able to confirm that this should be a clever mechanism, similar to a modern password lock. The raised and sunken areas on it are actually passwords, and they must be pressed in order to open it.

Cracking a password lock is a test of ear strength. Generally speaking, a password with a completely correct order can make the spring inside make the same sound and then open the lock. If different sounds appear, it means that the order is wrong.

Zhang Yu tried again and again, and this time, three identical sounds finally appeared in a row. Zhang Yu was completely sure that he had successfully found three orders this time, maybe one, or two, he should be able to open this mechanism.

Recalling the sound made when he pressed it before, Zhang Yu slowly moved his finger to a grooved ground.

He just pressed hard, and then with a "click", the stone wall in front of him moved and began to rise slowly.

"There is really a mechanism!" The young man was stunned when he saw the stone wall rising.

She really couldn't believe that there was actually a mechanism here. Zhang Yu had been studying it for so long, but he could actually open it.

As the stone door rises, there is another stone door behind the stone door. However, above the front of the stone door, there is a copper ring, which seems to be able to open the door by just pulling the copper ring.

Zhang Yu was not in a hurry. He first looked at it and grabbed the copper ring. He gently pulled it down, but he was also careful to avoid any mechanism traps. It’s true that there was no mechanism. As he pulled it, the stone door behind him slowly rose up.

When the stone gate rises, a cave appears behind it.

"There is a way..." The young man was overjoyed and couldn't help but scream.

There is no way to go to a normal passage. At present, this cave can basically be said to be the only opportunity for the two of them.

With a "puff", Zhang Yu entered a fire talisman to use it to illuminate it.

The cave is not long, and the end is about ten meters ahead. It is precisely because of its shortness that Zhang and Yu could see clearly that there was a turning passage at the right end.

"I'll go in and take a look first." Zhang Yu pinched the Seven Star Knife and walked in slowly.

The young man followed behind and walked very slowly.

The two of them walked to the corner one by one. As soon as Zhang Yu stepped onto the corner one foot, he heard a "click" sound, and the ground seemed to sink a little. Zhang Yu quickly took two steps back, and then heard two "clang" sounds behind him.

The two of them looked back together and saw that the stone gate that had risen before fell down at an extremely fast speed and smashed hard on the ground.

"How did this...the door close..." the young man frowned.

"It doesn't matter. This should be an automatic control agency. The purpose is to prevent others from discovering the stone gate of the agency here after entering." Zhang Yu said.

"So that's the case, what should we do now?" said the young man.

"There is no other way. We only have one way, which is to continue moving forward." Zhang Yu said.

"Yes." The young man nodded.

Since the two of them have opened the mechanism and come here, they cannot turn back, but can only continue to move forward.

Following the dark corridor, the two walked slowly forward. Zhang Yu threw out a fire talisman from time to time to use it for lighting.

As we walked, a double fork intersection appeared in front of us.

One road leads to the left and another road leads to the right.

Seeing that there were two choices, Zhang Yu stopped and looked at the young people around him, "I really didn't expect that this passage is not only quite long, but there are still two roads. Which one do you think is better to choose."

"This..." The young man was a little hesitant for a moment. God knew which road to choose is more reliable. After thinking about it, the young man pointed to the intersection on the right and said, "Otherwise, choose this... If it doesn't work, let's choose another one..."

"Okay." Zhang Yu nodded.

How to choose the two paths? For the two, they are actually similar. Let’s go one first and then talk about it. If it really doesn’t work, then turn back and walk another one.

The two of them then walked towards the intersection on the right and continued to move forward slowly along the corridor.

After walking for a while, I reached the end. There was a stone wall in front of me, and there was no more road.

"That's the end." said the young man a little disappointed.

"Let me take a look." Zhang Yu said, walking to the stone wall, and stretching out his hand to knock.

"Bang bang bang..." This sound is very similar to the sound of the mechanism before. Although it is real, Zhang Yu was sure that this was definitely a secret door of the mechanism.
Chapter completed!