Skilled in managing a house

"Of course there is a problem. If my guess is correct, this should be the portal to get inside." Zhang Yu said.

"The door to enter...how to open it...is there any mechanism..." The female driver immediately became energetic when she heard what Zhang Yu said.

"There must be a mechanism. I'll observe it first." Zhang Yu said.

"Okay." The female driver nodded and said nothing so as not to distract Zhang Yu.

Zhang Yu carefully observed the stone wall in front of him. On the stone wall, there were patterns on the outer circle and a "cross" line in the middle.

There is a groove in the four sections of the "ten" line. Looking at the cross line, it looks like a slide.

In addition, at the four intersections of the "ten" lines, there are a row of small stone balls with numbers engraved on them, all of which are "one, two, three, four, five, six, seven, eight, nine, zero" in traditional Chinese.

These four groups of balls have slides on them and can be connected to the "ten" line.

The entire stone wall looks like this and nothing else.

The female driver on the side was also observing. After watching it, she couldn't help but said: "Looking at it like this, it should be possible to move the ball to the end of the crosshair, and then the mechanism can be opened. I just don't know, what will the corresponding number be?" What is it?"

"That should be the truth." Zhang Yu nodded.

"But... I always feel... something is wrong..." the female driver said suddenly.

"Something's wrong? What do you mean?" Zhang Yu said curiously.

Although the female driver did not know any Taoist skills, Zhang Yu knew that she should be a thoughtful woman.

"If it is really what I just said, then why are the people who died here not here? This is where the agency is. Even I can see it. There are so many of them, so I shouldn't be unable to see it. That's right. Even if you don't know what the corresponding number is, with so many people taking turns trying it, you should be able to try it out..." the female driver said slowly.

"That's right." Zhang Yu couldn't help but nodded. He thought what the female driver said was very reasonable. Even if he didn't know what the numbers above were, he could figure it out sooner or later as long as he tried slowly, with a total of four groups.

Also, if there were hidden weapons above, these people shouldn't have died on the side entering the door, they should have died on the surrounding side.

But here, there is no hidden weapon at all. Even when he knocked on the wall, Zhang Yu didn't find any hidden weapons here.

"So... I'm more or less suspicious of whether this is a real agency... But right now, apart from here, there doesn't seem to be anything else suspicious..." the female driver said.

"You'll know after you try it first..." Zhang Yu said, stepping forward and taking only three steps, he came to the stone wall.

Then, he raised his hand and placed it on a small ball on the upper right side. The number on this ball is "one".

Zhang Yu is quite good at the art of mechanism. Although he is not as good as Zhu Jiuzhen, what Zhu Jiuzhen taught him was not a fake art of mechanism. Otherwise, Zhang Yu would not have been able to break so many mechanisms one after another. It's just that what Zhu Jiuzhen taught him was probably incomplete and must have been hidden.

However, Zhang Yu naturally ignored that now. He put his ear close to the ball. With his ability, he believed that with the sound, he could probably determine whether the placed ball could really open the mechanism.

After getting ready, Zhang Yu gently pushed the ball he was holding down the slide towards the "ten" line.

Zhang Yu listened carefully. The sound of the ball sliding was very soft, just making a slight "chi" sound.

With the movement of Zhang Yu's palm, the ball was slowly moved to the top of the "ten" line.

There was a soft "click" sound, and the ball landed directly.

The moment the ball landed, Zhang Yu suddenly heard a noise above his head.

"Click!"

Not only Zhang Yu heard this sound, but also the female driver standing behind him.

The two of them looked up almost at the same time. It was very dark here. Especially when they looked up, they couldn't see clearly at all. They couldn't even determine the height here.

But soon, Zhang Yu smelled a strange smell.

This smell, I can't tell what it is, it's a bit fragrant and a bit sour. But as soon as he smelled it in his nose, Zhang Yu immediately felt something was wrong, that is, he had a feeling of suffocation, as if he couldn't breathe. He quickly checked his body with his inner eye, but there was nothing abnormal in his body. In this way, he was absolutely sure that this should be some kind of poisonous gas.

"This smells so weird...I...I suddenly ran out of breath..." the female driver said nervously immediately.

"This is poisonous gas, hold your breath quickly!" After Zhang Yu finished speaking, he immediately held his breath.

The female driver also quickly pinched her nose, not daring to breathe.

At this moment, Zhang Yu finally understood why those officers and soldiers died on the other side. That's because there is poisonous gas here.

Also, because of the poisonous gas here, people will not be given so much time to test which small ball will be the number that actually opens the mechanism. Everything must be completed in the shortest possible time, otherwise, people will most likely lose their lives.

After confirming this, Zhang Yu did not dare to neglect at all. He immediately pushed the No. 1 ball back from the groove. This time, his movements were very fast, unlike at the beginning when he pushed slowly.

Time waits for no one, and no one can bear to hold his breath for a long time. He might be able to hold on for a while longer, but the female driver certainly wouldn't be able to hold on for long.

Zhang Yu pushed the No. 1 ball back to its original position, and then pushed the No. 2 ball along the slide toward the groove at the top of the "ten" line. During the pushing process, Zhang Yu's speed was still faster than last time, and the ball still made a "chi" sound. When the ball was pushed into the groove, it made another "click" sound.

Along with this sound, another "click" sounded almost simultaneously from above.

"It's ringing again!" The female driver couldn't help but scream when she heard the sound and looked up again.

Zhang Yu also raised his head, but couldn't see anything at all.

"Could it be that another mechanism has been opened...I...I'm so suffocated..." The female driver seemed weak even as she spoke.

"Don't be afraid! You lie down on the ground now and try to breathe as little as possible!" Zhang Yu said directly.

"Yeah." The female driver knew that Zhang Yu was right and immediately lay down on the ground.

She tried to breathe gently, but with just one breath, she felt like she was suffocating. This special feeling is so uncomfortable that it feels like you can't breathe, just like asthma.

Zhang Yu didn't care about the female driver now, he just pushed the No. 2 ball out of the groove and put it back in place. Then push the "three" ball along the slide and into the groove.

"Click!" After the ball landed, it immediately made a soft sound.

Then, almost at the same time, there was a soft sound above the head, "Click!"