When night fell, Ye Nan and Du Lingyun were dressed in black, and the two sat in the shadow on the roof of the building, waiting quietly.

They were all dressed in pitch black, and even they wore black hoods on their heads, leaving only one pair of eyes outside, and at the feet of the two, each with a package.

Du Lingyun raised his wrist, looked at the watch with the black strap on his wrist, raised his head and whispered, "It's time, let's start acting." ”

Ye Nan hummed in a low voice: "Okay! ”

The two stood up from the darkness, Ye Nan picked up a backpack, and Du Lingyun opened the backpack under his feet and took out a crossbow gun from it.

Du Lingyun quickly loaded the crossbow gun, and then attached a thin steel rope to the ballista gun, this steel rope looks very thin, but it is extremely tough, at least it can bear more than a ton.

Du Lingyun raised his crossbow gun, aimed at a steel frame on the opposite rooftop, and pulled the trigger.

The crossbow arrow shot out, accurately passing through the gap in the steel frame, and then shot on the floor, while the steel rope in front of Du Lingyun was rapidly decreasing one by one.

Du Lingyun pulled the steel rope back, and the steel crossbow arrow that bounced off suddenly buckled the steel frame, Du Lingyun straightened the steel rope, and then wrapped it around the top of the building, and a steel rope bridge was formed.

Soldiers patrolled the Mining Bureau in pairs, but the tiny steel ropes in the night sky didn't attract any attention.

Ye Nan and the two of them carried their bags, put on gloves, picked up the slip ring, and when the soldiers patrolling below walked by, the two of them slid down the steel rope one after another, directly crossed the distance of more than 20 meters, and slipped on the roof of the opposite Mining Bureau building.

After the two of them looked left and right, they took out two more strong nylon ropes from the package, fixed them, and threw the ropes down.

This is the infiltration location they chose through the construction map, although it cannot directly reach the location of the director's office, but it is the most hidden and safe.

The director's office can be infiltrated directly through the exterior wall by breaking the windows, but that side is well-lit and guarded, so if you sneak in from there, there is a high chance of being discovered.

The two of them slid down the nylon rope directly down a dozen floors, and then docked at a window.

Ye Nan kicked the wall hard, his body suddenly swung out into the air, and then bounced back, landing directly at the window of the building and swinging directly in.

Ye Nan landed steadily on the ground, and Du Lingyun followed behind Ye Nan.

The two men pulled out their tranquilizer guns and carefully followed the corridor towards the location of the director's office.

As they walked to the corridor, the two of them suddenly heard footsteps and quickly stopped at a corner.

The sound of footsteps came in the direction where Ye Nan and the two were hiding, and when a guard came out, Ye Nan suddenly rushed out, covered his mouth, and hit him fiercely in the neck.

Before the guard could see who was attacking him, his eyes were already dark and he fainted.

Ye Nan hugged the guard's ribs and dragged him to a hidden corner of the safe passage.

The two men walked forward again, and by this time there was no staff in the entire building, except for the patrolling guards.

Ye Nan and the two quickly touched the door of the office of the director of the Mining Bureau, Ye Nan was in charge of guarding, and Du Lingyun squatted down, took out a few lock-picking tools, and began to tinker.

Du Lingyun is an agent, so he is naturally very proficient in these things, if he were replaced by Ye Nan, it is estimated that he would directly choose to break the door lock with a gun or break the door violently with one kick.

Different identities lead to different ways of doing things.

Du Lingyun's unlocking ability was not low, and it only took twenty or thirty seconds before he heard a click, and the door of the room opened.

Du Lingyun gently pushed the door open, walked into the door with a cat bent waist, Ye Nan glanced at it a few times vigilantly, and was about to turn into the room, but Du Lingyun suddenly let out a low exclamation.

"Ahh

Ye Nan's heart sank, and he turned his head to look, but saw that Du Lingyun, who had just entered the door, was falling softly, and a black shadow flashed suddenly in front of him.

Someone!

Ye Nan was taken aback, he never expected that there would be someone in the director's office!

Without turning on the light, this person was hiding quietly in the house like this, obviously it was definitely not the director himself, nor should he be a guard, so there was only one possibility!

Intruder!

Du Lingyun said that this information was only completed today and placed here by the director, and there will be a meeting tomorrow, and there are many countries that are very concerned about this vein, and this document is also what many people want to get.

Then the people in the room are likely to be agents sent by other countries to steal this important information.

Ye Nan held the tranquilizer gun in his hand and looked at the room vigilantly, feeling a little heavy.

Du Lingyun had already fallen to the ground, silent, and Ye Nan didn't know if he was dead.

Ye Nan glanced inside, and the people inside seemed to know that there was another person at the door, and they didn't move, but just quietly hid behind the director's desk, observing the door through the gap in the desk, waiting for the opportunity to attack.

Ye Nan took off the backpack on his shoulder with his backhand, and after looking at the situation in the house, he raised it with his backhand, and the long backpack had already flown into the house, and he himself rolled into the house with a tumble.

"Bang!"

A slight thud rang out in the room, and an additional anesthetic needle was attached to the long backpack.

Ye Nan was already hiding behind the leather sofa in the hospitality area of the huge office, he reached out and dragged Du Lingyun, who was no longer moving, to his side, and reached out to touch the major artery in his neck.

The heart is still beating, even and powerful!

Ye Nan breathed a sigh of relief, and quickly scanned Du Lingyun's whole body through the hazy light outside the window, and then found a needle in his chest.

Ye Nan pulled out the needle, took a look, and breathed a sigh of relief.

Anesthetic needle!

The other party should also use a tranquilizer gun!

Although the tranquilizer gun is not as powerful as a pistol, it is very effective in carrying out tasks, even better than a pistol.

Unless you shoot the pistol in the head or hit the heart, it can make the opponent die quickly, and the other positions cannot be immediately fatal, and the injured opponent will make a warning sound, attracting a large number of guards, and the person on the mission will be in danger himself.

The anesthetic gun is completely different, it doesn't need to hit your vital point at all, as long as it hits you, the anesthetic in the anesthetic needle will be injected into your body, a few hearts beat, the anesthetic will spread all over your body, completely anesthetize your whole body, make you lose your will and faint.

When the anesthetic gun is taken by surprise, the person who is injected will feel as if he has been bitten by a mosquito, and when he realizes that he is being plotted, the effect of the drug has often been attacked.

Ye Nan withdrew his hand, clenched the tranquilizer gun, and leaned against the edge of the sofa to look outside.