"Deviation rate: 4%...Congratulations, you have passed the second test, and the third test will start in ten seconds."

"The third test?" Ash subconsciously made a defensive gesture. He had never received a notice of the third test, nor did he know what the so-called "third test" was. Without prior notice, the assessor directly merged the second test and the third test to the same day!

The mechanical synthesizer sounded again, with a little distortion of electric current, telling the content of the third test to Ash.

"The assessment area has been closed. After ten minutes, the nerve gas will be continuously injected into the assessment area from the ventilation opening. The candidates are required to escape before they lose consciousness, otherwise it will be considered as a failure of the assessment. In addition, the nerve gas is fatal, but the assessment party will not take the initiative to rescue the candidates before sending a signal to give up, even if the candidates fall into a coma within the assessment area."

The mechanical synthesized sound ended abruptly, and the silence in the room returned to its original state.

"Escape from the secret room..." Ashe murmured to himself. He was not unfamiliar with such a game. In the isolation area, due to the collapse of the ground, many buildings sank into the ground. If he wanted to obtain the supplies buried in the ruins, he had to drill into the narrow gaps from a very young age and groped in the dark and cramped space...

The more you are in this situation, the more you need to keep your mind calm. Since the assessor has made such a proposition, there will definitely be a solution, otherwise, the assessment will have no meaning.

And in the ruins of the isolation area, Ash dared not be 100% sure that the tunnels inside the ruins would not be a shortcut to death.

Ashes first walked to the only door, which had been locked from outside. It was a cast iron door that was as thick as a palm, and even a steam gun could not penetrate it, not to mention that Ashes was now unarmed.

There is a lockhole with a diameter of about one centimeter on the inside of the door, but when the door was closed before, Ash noticed the sound of gear rotation from the inside of the iron door... It was a mechanical lock with extremely complex structure and it had a "protective device" - if someone tried to "technical opening" with thin iron wire, "master key" and other tools, it would trigger this "protective device". The mechanical lock would be locked by self-destruction. By that time, there would be no second way to open the door except for violence.

Ashes fumbled through the iron door. All the walls of the room were poured with high-grade cement, and there should be steel bars used to reinforce the walls. Although the strength may be a little weaker than that of the cast iron door, they cannot be broken by bare hands.

The area of ​​the room is about 30 square meters, and there is no exit except the iron door. There is no gap in the wall, just like an iron bucket.

"Inject nerve gas from the vent... the vent..."

Thinking of this, Ash ran back to the table and moved the table to the wall - the ceiling height of the room was about 2.5 meters. With the help of the table, Ash could reach out to touch the ceiling above his head.

There are four vents in total, but what disappoints the ash is that the size of the vent can only allow arms to pass through, and it is not realistic to use the vent to leave the room.

Moreover, he had no way to block the ventilation vent to prevent nerve gas from entering the room.

What to do... What to do... Three minutes have passed, but there is still no idea about how to escape from the room.

Calm down, you must calm down... He pinched the fingertips of his thumb hard. Under the stimulation of the pain, Ash temporarily abandoned those distracting thoughts and began to look at the things in the room.

This test is more like a puzzle, with clues to the answer hidden in the room, and everything that seems inconspicuous may be a crucial prop.

Dipping pen, white paper, ink bottle, table... These things are put together and no matter how they are combined, they seem to be of no help to escape. The dim lights projected from the ceiling...

Um?

At first, the ashes didn't pay much attention to it, but now it seems that the lights of the incandescent lamp are too dark?

The table was dragged under the light again, and the ashes stepped on it, and the only light source in the room was observed up close.

"This is actually a... a car lamp?"

Ashes were a little surprised. Although the lamp had disguised itself as an incandescent lamp, one side of the lampshade even pulled out a wire and penetrated it into a small hole in the ceiling, when Ashes looked closer, he realized that the "incandescent lamp" turned out to be a gas lamp.

Moreover... the fuel used in this gas lamp is not the common kerosene or paraffin oil, but black gold powder with energy countless times greater than kerosene. The reason why the light is so dim is because the air valve limits the amount of oxygen entering the lamp, which greatly slows down the combustion reaction of the black gold powder. However, if the contact is limited, the violently reacted black gold powder will release a huge amount of heat...

And if this reaction is allowed to proceed in a sealed, narrow space, the combustion will turn into...explosion!

Ashes immediately turned his attention to the iron door... With the strength of the iron door, it is definitely not a problem to withstand an explosion of this scale, but the door shaft at the connection between the iron door and the wall is relatively much more fragile. If the door shaft can be blown up, then the entire iron door can be completely removed from the wall!

The problem now lies in making the container for this "bomb" - if the black gold powder is to be processed into a bomb, the shell must be hard enough. If the container breaks before the reaction is severe enough to blow up the door shaft, all the previous efforts will be wasted.

The ink bottle is made of very fragile ordinary glass, with an average thickness and cannot meet the requirements as a container. The pen holder used for dipping pen is walnut and tortoiseshell, which is not a common metal, and its strength is not as strong as that of glass ink bottles...

Metal container... Where to find a metal container?

Ashes squatted on the ground and pondered for almost a minute before suddenly lifting his head and looking at a dark corner.

In that corner, a loudspeaker was installed, and the previous mechanical synthesizer sound was transmitted from this loudspeaker!

Stepping on the table, Ash pulled the loudspeaker off the ceiling in an extremely rough manner, and successfully removed a piece of brass tube about the same length and thickness as his thumb from it.

The gas lamp on the ceiling had also been taken off. Ashes carefully poked a strip of paper from under the glass lampshade and approached the nozzle. After successfully obtaining the fire, he turned off the air valve. Without the oxygen that could react with the black gold powder, the light quickly went out.

With a ray of light emitted by the burning of white paper, the ashes began to dismantle the steam lamp, take out the black gold powder, and pour it into the brass tube...

It was almost at this time that a pungent smell spread in the air. It was the nerve gas injected into the room through the ventilation duct. Every second, the concentration of the poison gas in the room will increase by one minute...

The ashes had slowed down the frequency of breathing as much as possible, but the feeling of headaches gradually surged up. This was a sign of mild poisoning. For him, there was not much time left.

The body of the black gold powder bomb was completed quickly, and Ash even made a simple detonation device with copper wires and other parts in the amplifier. Now, as long as the bomb is placed next to the door shaft, everything is done.

But new problems immediately emerged... The power of the black gold powder bomb is not small, and the ashes of the manually detonated bomb will definitely be affected by the explosion. If you want to detonate it safely, you must have a "fuse" long enough.

Paper was originally a good material, but now the amount of paper left is not enough to make a lead that is long enough.

Ink! That bottle of ink!

This is a special alcohol ink. The alcohol content in the ink exceeds more than two-thirds. This is originally a pigment used for painting. After the alcohol evaporates, the pigments left on the paper will dye irregular color pieces, which will make the painting show a different sense of art. The Imperial Intelligence Department uses alcohol ink to transmit intelligence - those words written in alcohol ink will become blurred and difficult to identify after a period of time, and can play a certain role in keeping confidentiality.

For ashes, it doesn’t matter whether it is used to paint or copy secret letters. What’s important is that this ink is very flammable!

A "fuse" composed of ink extends from the door to the corner of the room. Ashes squatted behind the table that was being put down, holding a very fine paper rope in his hand. A small flame was flashing unpredictably at one end of the paper rope - this was the only chance. The pungent smell in the room was already very strong. He held his breath and lit the tail of the ink fuse.
Chapter completed!