We asked you to solve cases, and here you are sharing your criminal experiences?

The air conditioning in the hospital's security monitoring room was blasting.

Several large screens were lit up side by side, and members of the Major Crimes Unit were crowded around the control panels.

Lin Wan was typing on the keyboard, retrieving last night's video.

"Captain Gu, something's not right here."

Lin Wan pointed to the screen in the middle, "At 2:40 a.m. last night, the security camera in the pharmacy corridor captured a person."

On the screen, the long corridor was empty, with only the pale motion-sensor lights on.

A nurse pushing a double-decker stainless steel medical cart appeared at the end of the corridor.

She was wearing a nurse's cap and a mask that covered most of her face, and she walked quickly with her head down.

As she approached the pharmacy, the nurse stopped, took out her work badge from her pocket, and swiped it in the sensor area.

The door opened, she pushed the cart inside, and ten minutes later, she left the surveillance area by the same route.

Old Zheng stared at the screen for a long time, then scratched his thinning hair:

"She's just a nurse on the night shift, what's wrong with her?"

The head of the hospital's security department stood aside, shaking his head repeatedly: "Officer, we just checked the shift schedule. There were no nurses on this floor scheduled to go to the pharmacy to pick up medication between 2 and 3 a.m. last night."

Gu Tingchen braced his hands on the control panel.

"Lin Wan, slow down her movements as she enters and leaves the room."

Lin Wan immediately used the mouse to pull the progress bar back.

Song Qianxia, ​​who was originally standing on the outermost edge, squeezed right next to Gu Tingchen and stared at every detail on the screen.

"stop!"

Song Qianxia suddenly spoke up, pointing to the frozen image on the screen: "Rewind five seconds, play it three times at 0.5x speed."

Lin Wan did as instructed.

No one knew what Song Qianxia was looking at; they could only follow her finger and stare at the screen.

"Look at her feet."

Zhou Zheng leaned closer to the screen, staring at it with wide eyes for a long time: "What's wrong with your feet? Aren't these hospital flat nurse shoes?"

"Stride." Song Qianxia pointed to the gaps between the tiles on the ground.

"If you look closely at the distance she crosses these tiles, you'll see that the position of each step she takes is almost exactly the same."

"No matter how consciously an ordinary person walks, it is impossible to maintain such a precise mechanical stride. This is someone who has undergone rigorous professional infiltration training."

Song Qianxia continued pointing at the nurse on the screen,

"Look at the route she took. There are three intersecting surveillance cameras in this hospital corridor: the front, the middle, and the back."

"She pushed the medical cart, seemingly casually walking along the side against the wall. But notice the height of the cart and the angle of her body. She perfectly utilized the obstruction of the medical equipment and the shadow of the corner to avoid being directly captured by any of the probes."

"We looked for a long time, but apart from a back view and a small part of her profile, we couldn't even see what her eyes looked like."

Old Zheng was dumbfounded: "How well must they have memorized the hospital's blueprints to navigate so accurately?"

"And there's more." Song Qianxia paused the flat screen and pointed to the nurse's footsteps.

"Although the surveillance footage doesn't produce any sound, you can see from her heels that when an ordinary person walks, their heel strikes the ground first, which creates a certain impact. But when she landed, there was a very obvious cushioning effect; the outer edge of her toes touched the ground first, followed by the entire sole of her foot."

Song Qianxia concluded decisively: "This is a cat-like gait designed to completely eliminate the sound of footsteps in a quiet environment."

Zhou Zheng's voice betrayed his undisguised shock.

"This is stealth footwork! Even our special police assault team members need to practice for months and they might not be able to walk this smoothly."

Lin Wan, who was listening nearby, got goosebumps.

Gu Tingchen remained silent, simply listening quietly to Song Qianxia's analysis.

Song Qianxia reached out and tapped the screen.

"And this move too."

The image freezes on the nurse raising her hand and touching her work badge to the access control sensor area.

"Lin Wan, how do you usually get your access card?"

Lin Wan pulled out her police ID from her pocket, pinched the edge of the card between her thumb and forefinger, and made a forward-handing motion: "Just take it like that? Isn't that normal human behavior?"

"Yes." Song Qianxia nodded. "This is a normal person's habit."

She pointed to the hand wearing a medical latex glove on the screen.

"But look at her. Although she's wearing gloves, her fingers are curled up. She's holding the card between her fingers and using the second knuckles of her index and middle fingers to brush along the edge of the card."

Song Qianxia personally bent her fingers and demonstrated the action.

"Why are you doing this?" Old Zheng couldn't understand.

Gu Tingchen said in a deep voice, "To avoid leaving any fingerprints on the cards and access control machines."

Song Qianxia snapped her fingers: "That's right."

"This is definitely not some rookie mass-produced by an underground academy. Nor is it that fake Mirror who only knows how to show off his skills."

"Deliberately avoiding surveillance can be seen as scouting ahead, but this subconscious act of hiding fingerprints is a habit developed by an experienced fighter through countless real-world operations."

The members of the Major Crimes Unit felt a chill run down their spines.

Just how many monsters and scoundrels did that massive and mysterious Night Owl organization send to Jiangcheng? What exactly are they planning to do?

The hospital security office was extremely quiet.

Zhou Zheng stared at the fake nurse on the screen, stroking the stubble on his chin.

"This guy is no ordinary petty thief!"

Gu Tingchen turned to look at Xiao Zhang, who was busy in the technical department next to him.

"Did they find anything?"

Xiao Zhang sat at the security office desk, his fingers flying across the keyboard.

"No, the other party is really an expert; their operation was extremely secretive."

Song Qianxia suddenly raised her right hand.

"Sir, I would like to request permission to use the restroom."

Gu Tingchen turned his head, his gaze sharp.

"You were there just half an hour ago."

"Being nervous, frequent and urgent urination is an occupational hazard for modern workers."

Song Qianxia stood up and was about to leave.

As she passed by Xiao Zhang, she accidentally stumbled.

He crashed directly into Xiao Zhang's chair.

"Oh my god!"

Song Qianxia quickly grabbed the edge of the control panel to steady herself.

Fingers flew across the keys on the keyboard like they were playing the piano.

"Sorry, my legs are numb, my legs are numb."

Song Qianxia quickly put on a smiling face, but Lin Wan pulled her back.

"Are you alright? I'll go with you..."

Before he could finish speaking, a crisp "beep" sounded on the main control screen.

The scrolling code stopped instantly.

Immediately afterwards, a black dialog box popped up in the center of the screen.

Xiao Zhang exclaimed in surprise.

"It's solved!"

Everyone's attention was drawn to the screen.

Gu Tingchen glanced at Song Qianxia, ​​but didn't expose her little trick just now.

"Extract the core files," Gu Tingchen ordered.

Xiao Zhang was so excited that his hands were shaking as he pressed the Enter key.

A pattern made up of pixels slowly appeared in the black dialog box.

It was a silver bird about to take flight.

Below the bird's wing is a bright red cross.