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

Director Wang slumped in his chair, his face ashen, like a terracotta warrior just unearthed from the ground.

Gu Tingchen looked down at him.

"A three-minute gap in surveillance footage. Such a huge security breach, and not only did you not report it, you helped cover it up. Director Wang, you're going to jail for good!"

Director Wang covered his face and wept bitterly, his voice trembling.

"I genuinely thought it was just a system glitch! I checked everything, and it's all there. Who would have thought someone would be so audacious as to pull this switcheroo right under the noses of city leaders!"

Hearing this, Old Li gasped, his hand trembling as he pointed at Director Wang: "You...you're going to ruin the century-old reputation of Jiangcheng Museum!"

Deputy Curator Chen, who had previously been so arrogant, still stubbornly argued, "The seal was indeed intact at the time; who knew the security system would malfunction..."

Song Qianxia leaned against the display case and rolled her eyes dramatically.

That old man is both stupid and greedy.

Even if this level of security system malfunctions, it will immediately trigger the backup power supply and independent recording module.

The screen went completely black for three minutes, clearly indicating that someone had pulled the plug from the management end.

Song Qianxia cleared her throat.

"Director Wang, when I used to work at an escape room, the boss installed this kind of infrared surveillance to prevent people from skipping out on their bills."

"The instruction manual clearly states that this device will not completely collapse unless it encounters a targeted external attack."

"If it had really been hacked, the system's defense mechanism would have automatically locked all access control systems. How come your front door is still intact?"

Gu Tingchen turned his head and glanced at her.

Song Qianxia immediately stood up straight. "Reporting to Captain Gu! This is common sense for working people!"

Gu Tingchen gave a light hum and pointed out the key point.

"So it wasn't an external attack, it was an internal access control shutdown."

Gu Tingchen turned to look at Xiao Wang from the technical department who had come to provide support.

"Go to the server room and check the system logs, focusing on the period three days ago. Who accessed the main console?"

Xiao Wang grabbed his laptop and ran off in a flash.

Gu Tingchen looked at Director Wang, who was still wiping away tears.

"These exhibits were transported from the underground vault to the special exhibition hall three days ago. Which route did they take? Show us around!"

Director Wang dared not utter a single word of objection, and scrambled forward to lead the way.

The group came out of the special exhibition hall on the second floor and walked down the internal staff passage.

Song Qianxia followed behind Gu Tingchen, looking around like a country bumpkin visiting the city for novelty.

This road is very well secured.

Three fingerprint locks and two retinal access control systems.

The corridor is lined with stainless steel explosion-proof walls. Even if they were given three hours, let alone three minutes, they wouldn't be able to do anything big inside.

Lin Wan watched as Song Qianxia took two steps and touched the wall every time, and couldn't help but ask, "What are you doing? Do you think we're playing an escape room puzzle?"

Song Qianxia spoke nonsense with a straight face: "I'm looking at the feng shui here. These walls are too cold, which is not conducive to the accumulation of wealth."

Lin Wan chuckled and patted her on the shoulder, "What time is it and you're still being cheeky?"

At the end of the passageway is a dedicated freight elevator.

After exiting the vault, you must take this elevator to reach the second floor.

Outside the elevator door is a transfer room with an area of ​​about ten square meters.

It is usually used to park carts and temporarily check the exhibit list.

Song Qianxia stopped in her tracks as soon as she stepped into the transfer room.

She looked up, her gaze sweeping over the three hemispherical cameras on the ceiling.

Gu Tingchen also stopped and looked in the direction she was looking.

"Captain Gu, this place is interesting." Song Qianxia pointed to the camera in the upper left corner that was facing the freight elevator door.

"There is a blind spot between this camera and the wide-angle monitor in the corner."

Gu Tingchen immediately summoned the local police officers who were with him.

"Go to the monitoring room and switch the live feed from these three cameras to my tablet."

Less than a minute later, the tablet in Gu Tingchen's hand lit up.

Song Qianxia walked to the intersection of the two cameras and began to measure the area with her footsteps.

She walked with her head down, toes touching heels, completely focused.

"One step, two steps, three steps..."

She stopped in front of a metal cabinet against the wall.

"Captain Gu, can you see me?" Song Qianxia waved from the corner of the wall.

Gu Tingchen frowned slightly as he looked at the screen on the tablet.

Song Qianxia was not seen in any of the three surveillance videos.

Song Qianxia jumped out from the blind spot and dusted off her hands.

"I just measured it with my feet. This blind spot is about two square meters. There's definitely no problem for three or four adults to stand in it."

Lin Wan asked in surprise,

"How come the security company didn't notice such a large blind spot during the setup?"

"Of course it was left there on purpose." Song Qianxia pouted. "This metal cabinet was supposed to be placed against the wall, but someone moved it a bit outwards. With the pillar blocking the view, it created a two-square-meter safe zone."

Gu Tingchen handed the tablet to Lin Wan and strode to the blind spot.

"Debriefing the scene. Lao Zheng, you stand over there as a guard. Lin Wan, you're in charge of pushing the cart."

Everyone immediately got into the zone.

Gu Tingchen pointed to the elevator door.

"Three days ago, the genuine item, packed in a temperature-controlled box, came out of the vault and arrived at this transfer station."

"At this point, the security personnel responsible for escorting the goods need to scan the code here to confirm the list."

Gu Tingchen walked over to Lao Zheng and said, "At the very moment the QR code was being scanned, the surveillance cameras suddenly went completely black."

Song Qianxia immediately picked up the conversation and gestured to indicate the name.

"In those three minutes, the mole pushed the box containing the genuine item, quickly took two steps back, and entered this two-square-meter blind spot."

"And here, an identical counterfeit box had already been placed beforehand."

"One person was responsible for hiding the real box behind the metal cabinet, while the other person pushed the fake box back into place."

"Then tear off the electronic seal from the real box and stick it on the fake box."

"If you're quick, two minutes should be enough!"

Gu Tingchen looked at the metal cabinet that was half a person's height.

"The surveillance footage was restored in three minutes. The security personnel still saw the sealed boxes. No one would suspect anything."

"And just like that, right under everyone's noses, they pulled off a sleight of hand."

Old Zheng broke out in a cold sweat upon hearing this.

"This plan is too meticulous. They not only calculated the timing accurately, but also designed the blind spots of the surveillance and the positions of the personnel in detail."

Director Wang leaned against the wall, swaying precariously.

"Three days ago... it was during the pre-exhibition rehearsal. Everyone in the museum was busy on the second floor, and the transfer room was indeed a mess."

Gu Tingchen turned around, his gaze cold and sharp.

"Who was in this transfer room at the time?"

Director Wang shakily pulled out his phone and looked through that day's work log.

"Yes... there's Deputy Curator Chen, who's in charge of access control. And there's Security Supervisor Liu Dali, who's in charge of verifying the seals."

"And there's one more person. Liu Cheng, the old restorer in the restoration room. That day, the base of a bronze artifact on the second floor came loose, and he came down to get his special restoration tools."

As soon as he finished speaking, the eyes of the task force members instantly turned like sharp swords towards Deputy Curator Chen, who was hiding at the back of the crowd.

"What are you looking at me for!" Deputy Curator Chen exclaimed like a cat whose tail had been stepped on. "I was indeed responsible for accessing the database, but the surveillance cameras were off, and the room was dark and messy. I didn't do anything!"

Old Li pointed at his nose and cursed, "Chen Jianming! I see you're not only academically dishonest, but you were also desperately insisting that the fake was real just to cover up your fraudulent scheme!"

"I didn't! Old Li, you stubborn old man, stop spouting nonsense!" Deputy Curator Chen retreated in a panic, trying to run towards the exit of the passage.