Chapter 316: Shackles and Keys

The cold iron ladder finally climbed to the end, and above his head was a platform with a metallic texture. Lin Yu flipped up and found himself in the top-floor maintenance area. The air was dry to the point of being scorching, slightly cold, the smell of disinfectant was intensely pungent, and it was also mixed with a trace of ozone—the unique breath of high-precision instruments in operation.

Wang Gong's hoarse voice echoed in his mind: "Top floor East Wing... biological lock... Zhao Kang left a backdoor... beware of backlash..."

Not far ahead was the entrance to the "special monitoring area." The heavy alloy door was tightly closed, like the teeth of a giant beast. On both sides of the alloy door were heavily armed guards, like two silent statues, motionless.

Behind their helmet visors, the indicator lights on their respirators flashed with ghostly green light, showing cold efficiency.

Directly above the door, a ghostly blue scanning beam swept across the area in front of the door rhythmically—the iris and gene dual biological identification system declared that the defense here was impregnable.

Charging in was suicide.

Lin Yu quickly hid in the shadows of the platform, leaning against the cold metal wall, like a lurking leopard, carefully observing the guards' movements.

Shift changes every fifteen minutes, patrol routes fixed, as precise as a precision instrument, and vigilance was pulled to the extreme.

Time passed second by second, Xuanyuan Qing's condition was critical, every second of delay was accelerating her death. Lin Yu knew he couldn't wait any longer. Lin Yu moved silently to the edge of the platform, close to an inconspicuous inspection interface.

He nimbly pried open the cover plate full of dust, revealing the complex crisscrossing lines inside and a few old internal communication ports. This thing was still a "private good" he had tinkered with twenty years ago to take a shortcut; the authority was pitifully low, but it was enough to create a little chaos.

He took out a modified micro-signal generator the size of a matchbox from the first-aid kit, skillfully connected it to one of the ports, and his fingers tapped rapidly on the built-in micro-keyboard, inputting a string of abandoned command codes that had long been forgotten by the system but were deeply engraved in his mind.

"Warning! Warning! An abnormality has occurred in the B7 zone low-temperature storage unit! Temperature is rising rapidly! Fire risk detected! Repeat, an abnormality has occurred in the B7 zone low-temperature storage unit..."

The harsh electronic alarm sound exploded from the built-in communicators worn by the two guards. Although the alarm level wasn't the highest, keywords like "low-temperature storage unit" and "fire risk" still caused the two guards' movements to freeze for a fraction of a second.

The guard on the left subconsciously raised his hand to press the communicator by his ear, his body turning slightly, his attention completely attracted by the sudden alarm. The other guard also frowned, his gaze drifting involuntarily toward the direction indicated by the alarm source.

Now!

Lin Yu's figure was like a ghost, shooting out from the shadows! His speed was so fast he only left an afterimage, and before the guards could fully react, he had already closed in!

His right hand joined like a knife, precisely cutting into the vagus nerve node on the left guard's neck. Almost simultaneously, his left elbow slammed into the nerve point on the back of his waist. That guard didn't even have time to groan before his body softened like he had been drained of bones and collapsed.

The other guard just realized something was wrong, turning his head violently, trying to raise the high-pressure stun gun in his hand. But Lin Yu's movements were faster; he slid forward, his left hand lightning-fast, locking onto the wrist of the hand holding the gun, twisting and wringing with force! The stun gun flew out of his hand.

At the same time, Lin Yu's right hand already had a silver needle, piercing without hesitation into the gap of the guard's protective suit neck armor connection.

The whole process was clean and neat, fast as a rabbit, taking no more than two seconds.

Lin Yu didn't even look at the two fallen guards, quickly dragging them into a tool room piled with debris nearby. He nimbly stripped off one set of protective gear and identity identification card, put it on in three or two strokes, and hung the identification card in the designated position on his chest. The visor fell, covering his face.

He took a deep breath, calmed his breathing that was a bit rapid due to the intense movements, and then strode to the heavy alloy door, raising his hand to swipe the identification card in the access control sensing area.

"Beep—Authority confirmed. Level 1 access passed." The cold electronic voice sounded.

The alloy door slid open to one side silently, revealing a small buffer room behind the door. Directly in front of the buffer room was the biological identification scanner flashing with ghostly blue light.

Iris, gene, dual verification. This was the real difficulty.

The "backdoor" left by Zhao Kang... and Wang Gong's words "beware of backlash"... Lin Yu's heart sank slightly; this door was afraid it wouldn't be so easy to pass.

He didn't immediately step forward to scan, but carefully observed the side of the scanner. Sure enough, at an extremely hidden seam, he found a micro-inspection hole that was almost fused with the metal background—this was a physical port reserved on the design drawings twenty years ago but never made public, known only to a very few core personnel.

He slid a special, hair-thin metal probe from the inside of his sleeve, the end of the probe connected to another smaller, matchbox-sized black jammer. He held his breath, his movements as gentle as if he were disarming a bomb, carefully inserting the probe precisely into the tiny inspection hole.

The jammer's indicator light immediately began to flash crazily and irregularly, emitting an extremely faint, almost inaudible electrical humming sound.

The biological identification scanning screen in front was instantly covered by dense static and garbled code, various data jumping and refreshing crazily.

"Identity verification in progress..."

"Iris data does not match... Warning! Warning!"

"Gene sequence comparison failed... Warning! Warning!"

"External signal interference detected... Countermeasure program starting..."

On the screen, glaring red warning symbols flashed crazily, and in the buffer room, the internal alarm was about to be triggered! The beep-beep-beep warning sound had already begun to sound.

Cold sweat seeped from Lin Yu's forehead, but his fingers holding the jammer were as steady as a rock, adjusting the jammer's output frequency and waveform extremely minutely.

He had to find the specific trigger frequency of the "backdoor" program left by that dog Zhao Kang before the system was completely locked or the highest alarm was triggered.

This feeling was like walking a tightrope on a stormy ocean. This "backdoor" left by Zhao Kang was indeed extremely unstable, even embedded with some kind of trap; once an operation error occurred, or it was identified as a malicious intrusion by the system, it would immediately trigger a stronger defense mechanism, or even directly destroy the port. Could this be the "backlash" Wang Gong mentioned? ===== CHAPTER 317 =====