One, two, and three building openings are all closed, so that door can only be the fourth building opening.

But the sound of iron rods across the concrete floor is getting closer and closer. From the sound, it can be concluded that the Qingtong people have already reached the third floor and can walk out of the safety door at any time. They have no time to run to the fourth hole and can only enter the third floor. Loudong, bet that the ascending stairs of the third building hole did not lock the door.

Fortunately, the iron door on the stairs on the third floor was open.

The two of them didn't care where Qingtong went, they went upstairs and went straight to the fourth building hole.

The ascending door of the fourth building was locked, and one had to find another door to go up to the roof.

The two looked down the aisle behind them together.

The aisles here are all connected, and the four safe passages, just don't know where to go to the rooftop.

Jiang Lou said: "Get the key first."

Gu Xiaofeng nodded, and the two quickly went downstairs together.

The rear entrance of the fourth building was bricked to death, and there were many sundries piled up in the opening, but the small iron gate leading to the first floor was open.

After going down to the first floor, the two heard the sound of iron bars hitting the stairs above their heads, and it was obvious that the person with green eyes had also entered the fourth hole.

The two found the second room next to the first building hole.

The door is not locked.

Although Gu Xiaofeng ran all the way after entering the dormitory, he also noticed that the doors of all the dormitories were closed, but the door of this dormitory was ajar.

Obviously, after being opened, the door was deliberately left open in order to save them time.

Gu Xiaofeng pushed open the door, looked at the devices in the room, but instantly felt like a fucking dog.

The room was empty except for a table in the middle with a stack of Jenga music on it.

The supporting point under the Jenga is two stacked glass balls. The lower glass ball contains two keys, while the upper glass ball contains a self-explosive device.

Resting on the ball is a crossbar more than ten centimeters high.

The crossbar is not horizontal, but slightly inclined, and the long and short wooden strips above are built on this inclined crossbar.

This Jenga is more than forty centimeters high, and it is built very cleverly. Every point is calculated to the extreme. If there is a slight deviation, the entire Jenga will collapse.

This stance can be seen at a glance. As long as you move the ball with the key below and change the force, it will trigger the self-explosion device in the ball above.

As for the power of this self-destruct device, it is natural that the person and the key are gone.

Gu Xiaofeng went to the table, looked at it for a while, and understood why the middle-aged woman had reached the first floor, and instead of taking the key away, she took the trouble to sell the map: "Or go directly to the rooftop to see if I can get it." to something?"

"I can't get it." Jiang Lou bent down and stared at the two glass balls below.

Gu Xiaofeng: "How do you know?"

"If you don't need these two keys and can get the things above, that woman will take the things and kill that guy herself, and won't sell the picture."

"why?"

"If you kill the green-eyed person, you have a chance to get something. No matter what it is, its value is far above 200 million."

Two keys, when picking up things from the rooftop, it is most likely that two people need to cooperate.

At this time, trust and tacit understanding are indispensable.

In order to make each other trust, Jiang Lou chose not to hide.

Gu Xiaofeng looked away from Jenga, and looked at Jiang Lou: "Can you take out this thing?"

This stack is tall, except for the ball with the key at the bottom, everything is connected to infrared rays.

Each infrared ray activates a self-destruct mechanism in the second ball, which means that apart from the ball containing the key, nothing can be removed.

This was almost a dead end, but he couldn't make Jiang Lou's face more paralyzed, Gu Xiaofeng had an intuition that this guy had a solution.

Jiang Lou: "I need a substitute."

Gu Xiaofeng: "What substitute?"

Jiang Lou: "Ball."

Gu Xiaofeng: "What kind?"

Jiang Lou pointed to the ball below: "The size is exactly the same, and the weight is no less than this. Go out and look for it, and see if you can find it."

Gu Xiaofeng: "I can handle the ball, but I need a piece of wood and a knife, the knife is sharp."

Wood is easy to handle.

The beds in those dormitories are all wooden canopy beds, and a single foot of the bed is enough to cut a ball out.

Jiang Lou looked away from the stack, glanced at Gu Xiaofeng, turned around and walked towards the door without asking any further questions.

They had to get the key before the green pupil came.

Every minute is very precious, but after Jiang Lou left the room, he did not open the door of the nearby dormitory, but walked to the door of the dormitory a few rooms away, and then took out a card to unlock it.

The door opened, and a bloody smell wafted into the nostrils. When entering the door, there were bloodstains all over the place, and the bloodstains were no longer fresh.

It can be seen that this is the dormitory where the body was first found.

Gu Xiaofeng looked around for a week, bent down to look at the bottom of one of the beds, and met two pairs of eyes that seemed to have seen a ghost.

There were two women lying under the bed, one of them was the middle-aged woman he had seen before, and the other was a young pregnant woman.

When hunters chase their prey, they usually search places they haven't been to first.

The Qingtong people have committed crimes here, and the chances of coming here will be small before searching other places. Therefore, the entire farm dormitory, for the time being, will be the safest place here.

It is indeed a smart person for a middle-aged woman to hide here.

Jiang Lou didn't seem to notice that there was someone under the bed, pulled up his trousers, pulled out a Swiss Army short knife tied to his calf, and slashed at a bed leg as fast as lightning.

Gu Xiaofeng: "..."

Middle-aged woman: "..."

Pregnant woman: "..."

Jiang Lou caught the cut-off foot of the bed with one hand, hooked his foot over the chair next to him, and supported the bed with a missing leg.

The bed did not collapse, and the two people under the bed breathed a sigh of relief.

Jiang Lou turned the blade of the knife, the handle of the knife was facing Gu Xiaofeng, and passed the knife along with the bed leg.

Gu Xiaofeng took it, and the short knife was extremely heavy in his hand, and when his fingertips were close to the blade, he could feel the chill emanating from the blade: "Good knife."

Jiang Lou glanced at Gu Xiaofeng, tapped the edge of the bed with his fingers, and said coldly, "Come out."

The two people under the bed crawled out in panic.

Jiang Lou took out the map and pointed at the middle-aged woman, "This broken map doesn't even have a road sign, how dare you ask for 200 million?"

Gu Xiaofeng is rubbing the map, the money is not paid by him, and he has no right to speak, so he watches the show with his hands in his hands.

The middle-aged woman laughed and said, "It's not that I don't want to mark the route, but the lock will change. I ran several times, and the route is different, so I can't mark it."

Jiang Loudan looked at the middle-aged woman, noncommittal to her words.

The middle-aged woman felt hairy all over Jiang Lou's eyes, and the smile on her face became more and more bitter. When she was about to lose it, Jiang Lou said again: "The law of change."

The middle-aged woman said with a bitter face: "I have been in the hospital for too short a time, so I didn't get it out."

She and Gu Xiaofeng entered the door together, and something happened shortly after entering. There are dozens of locks in this dormitory building, and it was difficult for her to figure out the opening and closing rules of so many locks in such a short period of time.

But Jiang Lou didn't let her go, but changed the question: "How often does the lock change?"

The middle-aged woman answered very straightforwardly this time: "Three and 10 minutes."

Jiang Lou continued to ask, "When was the last time you changed?"

If you know how often those smart locks change, you will naturally know when they last changed.

Sure enough, the middle-aged woman said, "Ten minutes ago."

After 10 minutes, the locked status of the iron door in the dormitory will be refreshed, which means that after 10 minutes, they have to find their way again.

Finding the way again will increase the difficulty.

They have to get everything together within 10 minutes if they want to get it right.

Jiang Lou asked the middle-aged woman, "What time did you get on the rooftop?"

The middle-aged woman said a time.

Gu Xiaofeng looked at his watch, the middle-aged woman went to the rooftop four or ten minutes ago, and now the smart lock has changed: "Do you know which door can go to the rooftop now?"

The middle-aged woman shook her head and looked at Jiang Lou with a guilty conscience, fearing that if this man opened his mouth, he would deduct 100 million from her.

Jiang Lou looked away from the middle-aged woman's face, folded the map expressionlessly, and stuffed it into his pocket.

The middle-aged woman just breathed a sigh of relief, but saw him turn his head towards the door, "Go and lure that guy away."

The pregnant woman opened her mouth wide in shock, unable to believe what she heard.

The middle-aged woman pointed to her nose: "Me?"

"Otherwise?" Jiang Lou squinted at the pregnant woman: "Or she will go, or you can take care of that thing next door."

The middle-aged woman struggled for a while, looked at the pregnant woman's big belly, and resigned to her fate: "I can only last 10 minutes."

Jiang Lou looked at Gu Xiaofeng.

Gu Xiaofeng: "I need 6 minutes."

Jiang Lou nodded: "Just 10 minutes."

The middle-aged woman breathed a sigh of relief, ran to the door, pricked up her ears to listen, then opened the door lightly and went out.

Jiang Lou didn't leave the room immediately, but stood at the door, listening to the movement outside.

The sound of iron rods being dragged across the concrete floor came from far and near, and the pregnant woman turned pale with fright.

Jiang Lou glanced at the pregnant woman. The pregnant woman met his cold eyes and shivered suddenly. Jiang Lou said coldly, "Hide well."

The pregnant woman quickly climbed back under the bed.

Regardless of the sound of footsteps approaching this way, Gu Xiaofeng seized the time, cut off a piece from the bed leg, and started chopping wooden balls on the spot.

Just as the footsteps of the green-eyed man were approaching the door, there was a knock at the door in the corridor, followed by hurried footsteps rushing upstairs.

The sound of iron rods across the ground paused, and he chased towards the stairs.

The three people in the room took a breath at the same time.

No one knows if a middle-aged woman can really hold back the green-eyed man, if not, the blue-eyed man will fall back soon.

Time is tight.

Gu Xiaofeng was anxious, but his hand to chop the wood ball was steady.

Jiang Lou's short knife can indeed cut iron like mud, and the blade can cut hard wood, as easily as cutting tofu.

Five minutes later, Gu Xiaofeng threw a wooden ball to Jiang Lou.

Jiang Lou raised his hand to take it, weighed it in his hand, and opened the door without saying a word, Gu Xiaofeng followed closely.

The author has something to say: My Xiaofeng Xiaolou is actually pretty good.Begging for collection, seeing that the word count is almost reached, but the collection has stopped, so anxious~~

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