The one-meter-square steel plate is parallel to the concrete floor under the floor, with nuts on it, which can be connected to the floor above, and it looks like it should be integrated with the floor.

The reason why the floor on the steel plate is burned more seriously is that the principle is very simple, that is, the thermal conductivity of the steel plate is far stronger than that of reinforced cement concrete.

Brother Nine Fingers asked people to check it, and the steel plate was fixed very strongly. Brother Nine Fingers immediately ordered someone to smash the steel plate with a hammer.

When he came, Brother Nine Fingers was ready. Moreover, everything is ready-made, and when I searched before, it was impossible not to touch anything, and a lot of buildings were destroyed, and the result was nothing.

A sturdy horse boy came over with a hammer, and everyone's eyes fell on the steel plate. One of them muttered, "No wonder there are so many corpses here, it seems that they are all coming for what is hidden here." ”

Hearing this, Zhang Han's heart moved suddenly, and seeing that the strong man was about to smash it, Zhang Han hurriedly said, "Wait! ”

The strong man looked at Zhang Han in puzzlement, and then looked at Brother Nine Fingers.

Brother Nine Fingers said, "Brother, what's wrong? ”

Zhang Han said: "The boss here is good at using poison, I was poisoned by him before, but fortunately he didn't know my ability, so I took advantage of the loophole." So, I suddenly wonder now that so many people in the room could have died of poisoning......"

"Poisoned ......", "Poisoned ......", "Will it be poisoning?" …… Everyone present couldn't help but look at the surrounding corpses.

On the surface of the corpse, it must be impossible to tell whether it has been poisoned.

"I'm not entirely sure. However, if you can find the mechanism, this is the safest way. Zhang Han said.

"But...... It's all burned like this...... Wherever the mechanism can be, will it all be burned down......" Brother Nine Fingers said.

"This ...... I had people look at the floor just now, and it doesn't seem to be anything out of the ordinary. Otherwise, knock on the wall and see if you can find it...... By the way, you all go out first, wait in the corridor, you don't need so many people to ......," Zhang Han said.

Brother Nine Fingers immediately spoke and said, "Great heaven, take them all out." ”

"Yes, Brother Nine Fingers." Da Tiansan agreed, and then waved his hand and took everyone out.

In this way, Sister Maisi can only support Brother Nine Fingers.

Zhang Han asked Li Fan to knock on the wall, while he approached the wall and listened to the sound.

If there were a mechanism, the sound would definitely be different.

After tapping for a moment, Zhang Han suddenly heard the surprise of the voice.

In the center line of the steel plate, the sound of the wall is a little more muffled, and it is slightly different from the other positions, obviously there are a little holes.

Li Fan went to knock on other places again, and Zhang Han said, "Wait......"

"What? Did you find it? Li Fan looked at Zhang Han.

Zhang Han said: "It seems to be where you knocked on the wall just now...... You knock on the position just now......"

Li Fan immediately tapped on the position just now, and the slight hollow sound was estimated to be difficult for ordinary people to hear.

However, Li Fan tapped a few times in succession, and nothing special happened.

Zhang Han said: "It's still this position...... Tap upward...... Knock at least six or seven times in each place......"

"Okay."

Li Fan agreed, and according to Zhang Han's intentions, he tapped upward.

Zhang Han understands the principle of the mechanism, if it is empty, it means that there must be something connected to it such as wires. As long as you find the end of the series above, you will almost find the location of the mechanism.

Li Fan kept tapping upwards, and when he reached a position about 1.7 meters from the ground, he only struck four times, and there was a creaking sound on the iron plate on the ground.

Li Fan felt that the steel plate under her feet was slowly sinking, which startled her and hurriedly jumped to the side.

Then, they could see that the steel plate was sinking all the way down, very slowly, but without any intention of stopping.

It is now broad daylight, and I can see clearly from the height, although the steel plate is sinking slowly, it gradually has the height of a person. Moreover, it does not seem to mean sinking. On all sides of the steel plate, there were walls, and Zhang Han faintly realized that this thing could be an elevator......

If it's an elevator, it's sure to sink deep. The point is that Zhang Han has a concern, that is...... What should I do if the mechanism here can't control the steel plate to rise up......

If Zhang Han hadn't been injured on his back, he would definitely jump straight down. But right now, if you jump down, you will inevitably be involved in the injury on your back.

Forget it, let's take a look......

As Zhang Han expected, the steel plate is still sinking.

At this time, Sister Maisi said, "Doctor Zhang, you say...... Could this thing be an elevator......

"I doubt it too." Zhang Han said.

"Can you bring the mechanism up there again?" Maisi asked.

"It's hard to say." Zhang Han said.

However, Brother Nine Fingers smiled faintly and said, "Even if the mechanism above can't get it, it's not a big deal." You can find a rope to go down, I want to see how deep it can be. ”

After a while, the iron plate was no longer visible to the naked eye. Even Zhang Han's eyesight can barely see clearly. At present, it can be at least six or seven meters high.

"It's deep enough...... Maisi said.

Brother Nine Fingers said, "It's normal...... There is a basement here...... The large living room on the first floor has a ceiling height of about 5 meters, and the basement also has a height of about 3.5 meters...... It's definitely deeper than the basement...... Even if it's about 15 meters, it's normal......"

"It seems to be." Sister Maisi said.

Zhang Han nodded secretly, Brother Nine Fingers' estimation was similar to what he expected. This secret passage must be under the basement on the first floor, and it will be under the foundation.

After a while, even Zhang Han couldn't see where the steel plate was.

Li Fan took out his mobile phone to illuminate, even the flashlight of his mobile phone could not illuminate the situation in the depths below. Only Zhang Han can see that the steel plate is still sinking, and the height of the sinking is not easy to calculate, it is too deep.

There was a soft "click", I don't know if others can hear it, in Zhang Han's ears, it was indeed a very small movement.

At this time, the steel plate is no longer sinking.

Zhang Han said: "Let's see if we can knock the steel plate up." ”

"Good ......"

Li Fan handed the flashlight to Sister Maisi, and she walked around. It's a little hard to knock now, after all, the one-meter-square pit is too deep.

Li Fan held on to the wall with one hand and bounced over and knocked with the other.

After knocking several times in a row, Li Fan said, "How is it?" ”

Sister Maisi used a flashlight to illuminate, and she didn't know the situation below, so she could only look at Zhang Han.

Zhang Han measured it for a moment and found that it should still be in place just now, and he didn't move at all.

But Zhang Han didn't show how good his eyesight was, but said: "I can't see clearly, just wait...... If you can come up in two minutes, you can come up......"

(End of chapter)