As night fell, Ye Nan and Du Lingyun were wearing black clothes, sitting in the shadow of the roof of the building, waiting quietly.

They were all dressed in black, and even had a black hood on their heads, leaving only a pair of eyes outside, and under the feet of both, 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."

Ye Nan nodded in a low voice: "Okay!"

The two stood up from the darkness, Ye Nan carried 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 connected a small steel rope to the crossbow gun. The steel rope looked very thin, but it was extremely tough and could bear at least one ton of load.

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 shooting on the floor, while the steel rope in front of Du Lingyun quickly decreased in circles.

Du Lingyun pulled the steel rope back, and the bounced steel crossbow arrow immediately grabbed 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.

There were two soldiers patrolling around the Mining Bureau, but the tiny steel ropes in the night sky could not attract any attention at all.

Ye Nan and the others carried their bags, put on gloves, and picked up the slip ring. When the soldiers patrolling below walked past, the two of them slid down the steel rope one after another, crossing a distance of about twenty meters, and slid on the rooftop of the mining bureau building opposite.

After checking left and right, the two men took out two powerful nylon ropes from the package, fixed them, and threw them down.

This is the infiltration location they selected through the structure map. Although it cannot directly reach the director's office, it is the most hidden and safest.

Although the director's office can also penetrate directly from the exterior wall if he destroys the windows, there is plenty of light and many guards. If he dives from there, the possibility of being discovered is very high.

The two of them slid down the nylon rope for about ten layers and then docked at a window.

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

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

The two men pulled out the anesthesia guns and carefully followed the corridor to the location where the director's office was.

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

The footsteps came towards Ye Nan and the others hiding. When a guard came out, Ye Nan rushed out, covered his mouth, and blew hard on his neck.

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

Ye Nan held the guard's ribs and dragged it to a hidden corner of the safety passage.

The two of them moved forward again. At this time, there was no staff member in the entire building except for the patrol guards.

Ye Nan and the others quickly touched the door of the Director of the Mining Bureau Office. Ye Nan was responsible for the guard, while Du Lingyun squatted down, took out a few unlocking tools, and began to tinker.

Du Lingyun is an agent, so he is naturally very proficient in these things. If Ye Nan had come here, he would probably choose to smash the door lock with a gun or break the door violently.

Different identities lead to different ways of doing things.

Du Lingyun's lock-opening ability was quite good. It took only twenty or thirty seconds before he heard a click and the door of the room opened.

Du Lingyun gently pushed open the door and walked into the door with his waist. Ye Nan looked around and looked around with caution. Just as he was about to turn into the room, Du Lingyun suddenly let out a low scream.

"ah!"

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

Someone!

Ye Nan was shocked. He never expected that there was someone in the director's office!

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

Invader!

Du Lingyun said that this document was just completed and placed by the director today, and a meeting will be held tomorrow. There are many countries who are very concerned about this mine vein, and this document is also something that many people want.

Then the people in the room were probably agents sent by other countries to steal this important information.

Ye Nan held the anesthesia gun in his hand and looked at the room with caution, feeling a little heavy.

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

Ye Nan leaned his head and looked inside. The people inside seemed to know that there was another person at the door, and they didn't move. They just hid quietly behind the director's desk, observing the door through the gaps in the desk, waiting for the opportunity to attack.

Ye Nan took off the backpack on his shoulder with his backhand. After watching the situation in the room, he raised his backhand and the long backpack had already flown into the room. He also rolled and rolled into the room.

"Bang!"

A slight sound rang in the room, and an anesthesia needle was added to the long backpack.

Ye Nan had already hid behind the leather sofa in the hospitality area of ​​the huge office. He reached out and dragged Du Lingyun, who was already motionless, to his side, and reached out to touch the artery on 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 with the hazy light coming in from the window, and then found a needle on his chest.

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

Anesthesia needle!

The other party should also use an anesthesia gun!

Although anesthesia guns are not as powerful as pistols, they are very effective in performing tasks and are even more useful than pistols.

Unless you shoot the head or hit the center of the pistol, it can make the other party die quickly, and other positions cannot be fatal immediately. If you are injured, you will make a warning sound, attracting a large number of guards. At that time, those who perform the mission will be in danger.

Anesthesia gun is completely different. It does not need to hit you at all. As long as it hits you, the anesthetic agent in the anesthetic needle will be injected into your body. A few hearts beat, and the anesthetic agent will spread throughout your body. It will completely anesthetize your whole body, causing you to lose your will and faint.

When anesthesia gun attacks, the person who gets the needle will feel like he was bitten by a mosquito. When he realizes that he is being plotted against, the effect of the medicine will often have already occurred.

Ye Nan withdrew his hand, held the anesthesia gun tightly, and looked outside against the edge of the sofa.
Chapter completed!