High-level martial arts: Contract cashback, invincible starting from the Zerg.

The 22 guards quickly arrived at the first line of defense leading to the underground city—the Firepower Corridor.

This is a long corridor that was once called "the throat of hell" by the people of the Great Xia Kingdom at that time.

The metal rock walls on both sides of the corridor were covered with charred burn marks. Next to the rock walls were even numerous molten remains of giant beasts. Originally as hard as steel, they were now curled up into charred lumps like the cheapest waste.

"Look!" Xiao Wei suddenly pointed ahead and said.

Ahead lies this seemingly spacious passageway, yet it is filled with the aura of death.

There was a gun emplacement every ten meters or so, but only one out of every two or three emplacements had a triple-mounted cannon from that era, and only one of them maintained its overall functionality.

These cannons, their barrels covered with claw-like cracks, stubbornly remained aimed at the front of the corridor.

It was as if when the behemoth triggered the sensor again, these powerful cannons would roar once more and fire powerful metal projectiles—tearing the behemoth's minions, which were as strong as armored vehicles, to shreds.

"These cannons are called Light Rippers. Back then, they used tungsten steel armor-piercing shells. Five consecutive hits could penetrate the skull of a Xuan-rank Taotie behemoth. Even now, they can still be seen on the borders of the Great Xia Kingdom, only now the fire control system is much more advanced."

Ye Qingnan looked at the huge three-barreled cannon above and explained to the crowd.

However, Chen Feng seemed to see in his eyes a fear of the power of artillery.

Indeed, this is the case. Human beings at the Earth Rank have greatly improved their physical attributes and even have the strength to contend with Earth Rank behemoths and Earth Rank demons.

However, when facing artillery systems created by humans themselves, the enhanced physical agility of Earth-rank human powerhouses is more than sufficient.

Its ability to resist attacks, however, proved to be of little use.

Even weapons from hundreds of years ago can, under certain circumstances, directly kill a human Earth-rank expert!

Chen Feng looked up and gazed ahead...

The corridor before us was shrouded in a darkness filled with death, and its true length could not even be measured by the naked eye. However, according to the guard's records, the corridor was at least 3 kilometers long.

Furthermore, according to Chen Feng's highly sensitive information, the "Light Ripper" left in this corridor is not the only lethal weapon!

"We need to hurry on our way; it's not safe here," Chen Feng warned.

Ye Qingnan nodded.

"We're racing against time... As long as we can get through the gates of the Firepower Corridor, we can get to the control room of the dungeon as quickly as possible."

"clear!!"

As all the guards hurried forward down the long corridor, aided by beams of light, they made their way through the area.

But they didn't notice...

A small red light lit up on a sensor they had passed by.

In the completely dark corridor, the small red light seemed like the eye of Satan, radiating a dangerous aura.

......

Li Chongji, who was in the control room at this time, had already discovered the presence of the guards.

He secretly turned his head to glance at the Green Harbor holder.

They discovered that his nominal owner was still fast asleep on the bench in the control room.

So he reached into his pocket, his hand trembling.

He then took out a metal hard drive and connected a wire from the control panel in front of him to the metal device.

Soon, rows of parameters flashed across the screen of the metal device.

Meanwhile, Li Chongji's eyes were rapidly searching for the sensor signals in the firepower corridor.

"Give me just two minutes, and I can fool everyone," Li Chongji murmured, his forehead beaded with sweat from nervousness.

Li Chongji looked back uneasily and found that the Green Harbor holder was still asleep.

However, his sleeping posture was no longer lying on the bench, but with one hand supporting his chin, and his heavily closed eyelids facing Li Chongji's back.

It seemed he had already sensed Li Chongji's plot...

It was as if he would open his eyes at any moment and walk up behind Li Chongji with that cold dagger in hand...

Li Chongji swallowed hard, but continued to look at the metal device in his hand, his eyes searching for the crucial signal code among the countless rapidly flashing codes...

As time ticked by, Li Chongji felt his unease growing rapidly...

Just then, footsteps came from outside the control room.

The footsteps of one... three... a total of six people were gradually approaching.

Li Chongji's eyes hardened, and he immediately pressed the switch on the metal device, then secretly put the device back into the hidden compartment of his clothes.

When he turned back to look at the greenport holders again...

At some point, although he was still resting his chin on his hand, he opened his deep green eyes and stared intently at Li Chongji in front of him.

However, those devilishly deep eyes did not frighten him. Li Chongji forced himself to remain calm and walked out of the control room, turning his gaze to the doorway where the footsteps were gradually approaching.

"Thank you for your hard work these past few days, Mr. Li." The owner of Green Harbor smiled.

His smile was so genuine that even Li Chongji couldn't see any flaws.

However, when Li Chongji learned how many perverse things he had actually done, he discovered that his scheming was as unfathomable as an abyss.

As the owner of Green Harbor spun his chair and lazily looked toward the door of the control room.

A man wearing gold-rimmed glasses, along with several of his men, entered the control room of the underground city.

And that man was none other than the greedy demon who had swiftly dismembered Wei Yang!

"Welcome... my strategic partners..." The Green Harbor holder's lips curled up slightly, revealing a seemingly warm smile.

But that smile was like an icicle in the dead of winter.

It was icy cold, devoid of any warmth.

He seemed to despise this group of demons from the bottom of his heart, but he cleverly concealed this emotion beneath his fake smile...

When the man with the gold-rimmed glasses saw Li Chongji still lounging in the chair, he immediately frowned.

"My men told me that the Starfish City Guard has already set off..."

Upon hearing this, the holder of the Green Harbor simply smiled calmly, slowly turned the bench he was sitting on, and looked at Li Chongji...

This time, the Green Harbor holders' eyes seemed to have lost all malice and instead held a hint of unfathomable goodwill.

He looked at Li Chongji with a half-smile.

"Is he right, Mr. Li...?"