That night, the darkness was as thick as ink, and Zhang Mingda was still working late in the office.
Suddenly, Guo Yi appeared at the door, still dressed in the same outfit he had worn when he first arrived: a black T-shirt paired with jeans.
With a serious expression, he said to Zhang Mingda, “We have some leads on the ‘Ghost Wall’ case. Please come to Su Xiaoshuang’s office to assist me with the investigation.”
“Oh?” Zhang Mingda perked up at this, eager to see what Guo Yi was up to, and readily agreed.
When he arrived at Su Xiaoshuang’s office, he was taken aback.
In addition to him, Guo Yi had also invited Su Yong, other colleagues from the company, and several people who had been present at Su Xiaoshuang's death. He recognized the locksmith they had brought in and the sixty-year-old female janitor. It turned out that Guo Yi had not invited just him.
The office was brightly lit, filled to capacity with people.
Suddenly, with a loud “bang,” all the lights went out.
A terrified scream erupted from the crowd, followed by someone shouting at the top of their lungs, “Look! Look at the ceiling!”
After this shout, panic spread through the crowd like wildfire.
“Ah! The ghost is coming! The ghost is coming!” people cried out in fear, their voices echoing in the cramped space, filled with terror and despair.
As some began to frantically search for an escape route, they realized with horror that the office door had been locked from the outside without them noticing, as if it were a deathly shackle trapping them in this room filled with unknown fears.
Just as despair threatened to engulf them all, without warning, all the lights flickered back on and the door slowly creaked open.
Guo Yi stood at the door with his arms crossed over his chest, his posture straight and unmoving, resembling a judge in control of the situation. His gaze was cold and sweeping as he surveyed the crowd, speaking steadily, "I have found the ghost."
"Where? Where?" Some people frantically shielded themselves with the amulets hanging from their necks, as if that could protect them from the ethereal yet chilling presence of the "ghost." Others tightly closed their eyes, murmuring incantations, attempting to dispel their inner fears through the power of religion.
"If you want to know the truth, then go to the conference room," Guo Yi's voice rang out again, firm and unquestionable.
To save costs, the office building featured a well-equipped shared conference room. Any company could use it as long as they paid the rental fee. It seemed that Guo Yi had already reserved this space in advance for the "Ghost Hunting" operation, making thorough preparations.
As everyone entered the conference room with anxious hearts, they noticed that the projection screen had been set up, and two unfamiliar individuals were diligently working on a computer and projector.
Next to the computer was a cardboard box covered tightly with red cloth, leaving everyone curious and tense about what mysterious items might be hidden inside.
Guo Yi stepped forward and introduced one of them as a professional photographer and the other as a Chinese translator he had specifically hired.
He looked at Zhang Mingda and explained, "Mr. Zhang Mingda is Su Xiaoshuang's boss and doesn't understand Thai, so I arranged for a translator for him."
Zhang Mingda nodded slightly, casting a grateful glance at Guo Yi to express his appreciation.
"Please take your seats," Guo Yi said before nodding toward the two individuals handling the equipment.
The projection screen then displayed the scene where everyone had been trapped in Su Xiaoshuang's office moments ago.
The scene captured the panic-stricken expressions and frantic movements of the crowd, pulling everyone back to that terrifying moment.
"I'm sorry for secretly filming you all without your knowledge," Guo Yi's voice broke the brief silence. "I installed several pinhole cameras in Su Xiaoshuang's office to catch the ghost when everyone saw it. Please enlarge the close-up of each person's facial expression at that time," Guo Yi instructed the person operating the equipment.
One by one, the screen displayed the terrified faces.
Some people, seeing each other's bizarre and ugly expressions from that moment, couldn't help but burst into laughter, trying to dispel their inner fear with humor.
However, this laughter felt particularly jarring and inappropriate in the tense atmosphere.
After it ended, Guo Yi asked, "Did anyone see the ghost?"
The laughter in the crowd abruptly ceased, and the entire conference room fell into a dead silence.
Suddenly, someone turned and ran frantically toward the door, only to be swiftly tripped by a police officer hidden nearby, falling over in a heap.
When the police pulled the person up, everyone was stunned to recognize that it was Zhang Mingda.
"He's the ghost," Guo Yi said, replaying the close-up footage once more.
In the footage, every person's expression was one of panic, except for Zhang Mingda, whose demeanor was unusually calm. A hint of disdainful amusement lingered at the corners of his mouth, as if mocking everyone's fear and ignorance.
Guo Yi's expression was serious as he began to reveal the truth. "Only those who create ghosts know that there are no ghosts. The terrifying patterns on the ceiling were painted by him. He used a special potion that causes the markings on the cement to gradually disappear. However, this potion contains phosphorus, which glows in the dark.
At that time, many people fled in panic after seeing those patterns. Since he was the one who painted them, he did not run away. By the time the police arrived, the potion had dissipated, so they saw nothing."
"Why didn't that 60-year-old Female Janitor escape?" someone asked, puzzled.
Even the Female Janitor herself looked confused, her eyes filled with bewilderment.
"Please come here," Guo Yi said to the Cleaner, pointing to a stack of colorful napkins on the table. "Please hand me the red napkin."
The Female Janitor stared at the colorful napkins on the table, looking lost and unsure.
Finally, with a hint of embarrassment, she said, "I am colorblind."
Zhang Mingda suddenly let out a cold laugh, trying to defend himself. "I heard this building was haunted, so I thought I would make a joke. I didn't expect to encounter Su Xiaoshuang's suicide. This doesn't prove that I have any connection to her death. Her door was locked from the inside. Didn't you say her death was due to the 'Ghost Wall'?"
"That's right," Guo Yi replied sharply, his gaze fixed on Zhang Mingda. "I mentioned before that her office was not just a mere locked room; it was a 'Ghost Wall.' The 'Ghost Wall' refers to a 'Psychological Chamber.' Someone exploited Su Xiaoshuang's psychological weaknesses and constructed an airtight 'Psychological Chamber.'
That person is you!"
Guo Yi pointed his finger at Zhang Mingda without mercy, loudly exposing his crimes.
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