Yao Fei, Moonlight.

Yao Fei was a former colleague of Su Hui in the Behavioral Analysis Unit and someone he considered an adversary.

Su Hui’s lingering doubts finally found an answer.

Because of Yao Fei’s involvement, the current Bi Shanyu and the previous profile of him didn’t match at all. Their strategies against Bi Shanyu were completely ineffective.

Why would it be Yao Fei?

Had he really switched sides?

But if he had, why would he leave clues by making payments to them?

And why did he take away the bomb from Xu Shuang?

But if he hadn’t switched sides, why didn’t he report or contact the police? Why did he pretend to be Bi Shanyu?

Many things didn’t make sense. What was his relationship with the people behind the scenes?

Su Hui carefully recalled the events of the past six months. He felt like he held a handful of fragmented puzzle pieces and struggled to organize his thoughts, trying to piece together the past and uncover the one truth that had existed.

Su Hui gradually began to make sense of it all.

“I finally understand why Yao Fei disappeared. He must have discovered Bi Shanyu’s true identity during the Sand Case and has been tracing these clues.” Perhaps the real Bi Shanyu had already been under his control…

On the other end of the phone, Lu Junchi also realized, “If Bi Shanyu is Moonlight in disguise, then his target definitely won’t be the landmarks in the city center…”

“He might be targeting…” Su Hui said as he returned to the surveillance room. His mind raced, contemplating what Moonlight would do.

He was searching for memories of Yao Fei.

Yao Fei was someone who understood the criminals the most and was ruthless in his methods. He never played by the rules and was daring, capable of doing anything unexpected.

Su Hui turned around. He was now in the Huadu City Police Headquarters Command Center, where several officers were present.

The headquarters consisted of about ten buildings, with entrances on the front, back, left, and right.

Today, detectives and police officers from various departments had already set out. At this moment, the headquarters seemed the most empty… Could it be that the security here was relatively lax?

With this thought in mind, Su Hui coughed a few times and walked to the window, overlooking the headquarters’ courtyard.

They were on the upper floor of the main building, and as Su Hui looked down, it was hazy. He remembered that each of the four entrances below had at least two security guards…

To enter, there would be inquiries, registration, fingerprint verification, and facial recognition at the entrance of the main building…

It appeared impenetrable, with tight defenses and strict regulations.

But upon closer inspection, one would realize the numerous loopholes.

Entering this courtyard, one wouldn’t be searched or thoroughly examined. They only needed to fill out a so-called registration form, and the information on it wouldn’t be verified for accuracy.

The first-floor reception hall and several buildings behind it were practically accessible to anyone. The people coming in and out were a mixed crowd…

He could think of these things, and Yao Fei could think of them too.

When everyone else was being restrained by others, perhaps Yao Fei was executing his plan.

Su Hui recalled the route to the headquarters that Lu Junchi had told him. Even if it was a more circuitous way, it had been enough time to get here.

“I think his target might be the headquarters, and considering the timing, he might have already infiltrated.” Su Hui furrowed his brow as he spoke.

Lu Junchi also realized the gravity of the situation. “I’ll rush back to the headquarters immediately!”

Su Hui hung up the phone and turned around in a hurry. He, who had always been calm, finally showed a moment of panic.

He didn’t notice the trash can next to him and stumbled, falling directly onto it. The sharp corner of the table hit his old injury in the abdomen.

Su Hui was in pain, and his vision went black. He knelt on the ground, feeling a momentary shock of pain that seemed to stop his breath.

“Professor Su…” Qiao Ze was startled and quickly helped him up.

“I’m fine.” Su Hui took a breath and endured for a few seconds until he finally recovered. He didn’t have time to pay attention to the pain in his body. He let go of Qiao Ze’s supporting hand, turned around, and intended to go to Director Tan’s office nearby.

With his cane in hand, he walked quickly to the door of Director Tan’s office. But Su Hui suddenly stopped in his tracks.

This time, did he need to call for backup?

What if… it was another trap from the other side?

Would he end up endangering other people?

Su Hui closed his eyes, and the scene from two years ago reappeared in his mind.

He didn’t want to repeat that painful experience. He didn’t want to face more deaths.

He forced himself to calm down. The Yao Fei he knew, although aloof, was not someone who indiscriminately killed innocent people.

If Yu Yan’s death was truly a murder, and if Yao Fei’s resignation was also not without reason, just like his recent defamation, then was he here for revenge?

Yao Fei was always willing to take risks, and his actions were morally ambiguous.

If it was Yao Fei, where would he go?

In his heart, there was still a glimmer of hope. Su Hui didn’t believe that Yao Fei would plant a bomb in the headquarters and endanger everyone.

With this in mind, Su Hui turned around and took the elevator downstairs alone.

When he reached the first floor, he turned his head and looked at the greenery in the backyard of the headquarters, passing through a series of buildings and walking towards the back…

Just ten minutes ago, Yao Fei arrived at the side entrance of the headquarters carrying a black backpack.

A security guard stopped him at the entrance, asking, “What’s your business here?”

Yao Fei had a thought and looked up to see someone cleaning the exterior walls of the main building.

Every year at the end of October, the headquarters would contract an environmental protection company to clean the exterior walls. Due to the large number of buildings, the entire cleaning process would take about a week.

The police officers at the headquarters were used to this routine. Having worked here for many years, Su Hui was naturally well aware of it.

It wouldn’t be difficult to slip in during the chaos…

Yao Fei pointed and said, “I’m a window cleaner from the municipal bureau, and I came late today. I’ve already obtained permission from our supervisor.”

The security guard glanced at him and gestured behind, saying, “Go ahead.”

Although this was the headquarters of Huadu, not all security personnel were police officers. The police force was limited, so the headquarters had a dedicated security team. The chief and deputy chief of the team were police officers, and they would hire security personnel below them. Generally, there were two people guarding the entrance: one police officer and one security guard, identifiable by their identification numbers on their chests.

This security guard had been working here for several years. Every day, there would be hundreds, if not thousands, of people coming into the courtyard. He recognized Yao Fei and let him pass.

Seeing that the green light was given so easily, Yao Fei furrowed his brow and asked, “No need to register?”

A patrolling police officer came out of the security office, carrying an electric baton and wearing an identification number on his chest. He looked like he was part of the official personnel. He took Yao Fei’s suggestion and said, “Well, let’s register.”

The security guard lazily took out a register and said, “What’s your name? Write down your mobile number.”

Yao Fei casually wrote down a name and then a random string of numbers. In the last box, he wrote down the time of arrival.

“What’s in the bag?” the police officer pointed to the black leather bag he was carrying.

“They’re all cleaning tools and work clothes,” Yao Fei replied.

“How many more days will you be cleaning?”

“Probably four more days.”

The police officer looked up at the building and said, “It’s quite high. Be careful.”

“We have safety measures in place,” Yao Fei said, handing over the register. “I’ve filled it out. Take a look.”

“Alright, go ahead.” The security guard put away the register and waved his hand.

The police officer with the electric baton on the side said, “Remember to come earlier next time and go in together with them.”

Yao Fei smiled and adjusted his hat. “Officer, rest assured, there won’t be a next time.”

After speaking, he turned around, and the smile on his face turned into a cold smirk.

Nowadays, there are strict checks everywhere outside, but the headquarters is quite lax. He was able to easily infiltrate without much effort…

Perhaps these security guards, after working for so many years, had never encountered a criminal who willingly walked into their trap to commit a crime at the headquarters.

Yao Fei walked toward the main building of the headquarters, looking up at the twenty-two-story building. He had worked here for several years, and it didn’t seem to have changed much. Countless police officers hurried around, and the leaders also had their offices inside.

However, there was access control at the entrance. To enter, fingerprint and facial scans were required. It wouldn’t be that simple.

However, the security check at the adjacent administrative building was not as strict. There was a long elevated corridor on the eighth floor connecting the administrative building and the main building. The door there was always open, no access control needed.

He could blend into the administrative building and plant the bomb in the main building.

Or, if he wanted to be more ruthless, he could place it next to the main building’s load-bearing column. After a deafening explosion, the entire building would collapse…

The entire headquarters will turn into a hell on earth, with countless lives suffering.

More importantly, the headquarters of Huadu will become a laughingstock in people’s mouths, losing all credibility.

Quickly formulating a complete plan, Yao Fei’s mind was filled with scenes of sparks flying. He whistled in delight and walked inside.

Huadu Headquarters, 3:30 PM.

Su Hui entered a building located at the back of the headquarters, a place seldom visited by people. The building’s main door was unlocked, occasionally used for cleaning purposes.

Inside, it was deserted, with tables and chairs scattered in disorder, an office that had been abandoned for many years.

This was the place where Yu Yan used to work, and it was also agreed upon by him and Director Tan to be used as the Behavioral Analysis Unit. He once wanted to promote the development of criminal psychology as an essential department within the headquarters. The office, conference room, and archive room were all fully equipped, even larger than the Major Crimes Unit.

But life is unpredictable, and everything did not go as Yu Yan had imagined.

After Yu Yan’s death, this place was abandoned.

Even other departments felt it was unlucky and were unwilling to move in here.

In the blink of an eye, so many years had passed.

Su Hui recalled and walked in, his cane tapping on the ground, creating echoes in the empty office.

Before he could see if anyone was inside, he smelled cigarette smoke.

There was someone sitting in the office, smoking a cigarette.

“Yao Fei…” Su Hui pronounced his name.

The man with peach blossom eyes also looked up at him.

Su Hui was choked by the cigarette smoke and couldn’t help but cough a few times.

Yao Fei had a cigarette in his mouth and nonchalantly blew a smoke ring. “Poet, long time no see…” Then he leaned forward, carefully examining Su Hui. It seemed that he wasn’t surprised by his arrival at all. “You actually found your way here.”

“How long have you been here?” Su Hui asked.

Yao Fei flicked the cigarette ash and replied, “I haven’t finished smoking one yet.”

Su Hui calmly stood opposite him. “Where are the items?”

Yao Fei pointed to a black backpack nearby. “There are two of them here.”

“And one belongs to Xu Shuang,” Su Hui nodded, pulled a chair, and sat across from Yao Fei.

“These bombs are enough to kill both of us,” Yao Fei took a puff of smoke. “But the timed detonation is set for 5 PM. We still have time to chat. As a profiler, you should know why I’m here, right?”

Su Hui coughed softly. “This is the past, your and Yu Yan’s office. I think you returned to the headquarters to revisit the old place.”

When Yao Fei was still at the police station, Su Hui had seen him standing at the window of the main building, looking towards this place.

He would stand there for a long time, and his silhouette under the moonlight appeared lonely.

Yao Fei continued to ask, “So, what do you think I’m doing all this for?”

Su Hui replied, “I think you’re doing this for Yu Yan. Because you always felt that there was something wrong with Yu Yan’s case.”

Yao Fei squinted at him. “So, you do know this.”

Su Hui shook his head, closing his eyes. “I don’t know the details of Yu Yan’s case, nor have I conducted an investigation. I only know that for all these years, you have been haunted by this matter. The truth behind Yu Yan’s death is something you cannot let go of. That’s why your actions today should be related to this…”

He reconstructed everything in his mind, sorting through all the details.

After the Fine Sand Explosion case, Yao Fei was fired, and he was seriously injured. The Behavioral Analysis Unit fell apart and was forced to disband.

After leaving the headquarters that year, Yao Fei didn’t give up on finding the truth. He had been secretly investigating Yu Yan’s case, wanting to uncover the true cause of his death.

Yu Yan’s death may be related to the organization behind the scenes.

He must have found something.

Yao Fei said, “Then you should know my purpose.”

Su Hui replied, “I don’t think you came here for revenge.”

Yao Fei turned his head. “Why do you say that?”

Su Hui reasoned seriously, “If you wanted to kill someone, you wouldn’t choose the main building where there are more people. You wouldn’t choose such a secluded place. Even if there’s an explosion here, it would only kill the two of us at most.”

Yao Fei held his cigarette and said, “The main building? It’s not easy to enter there.”

Su Hui said, “You would probably choose the adjacent administrative building and sneak in from there.”

Yao Fei snorted. “I hate your self-righteous cleverness.”

Su Hui lowered his head without speaking. There was no color on his delicate face, but his heart was calm.

After years of working together, he was too familiar with the person in front of him. This was a reaction that only appeared when one’s weak spot was touched, indicating that his deduction was likely correct.

“Have you ever considered that maybe I’m deceiving you? Maybe I’m just here to stall for time, hiding and watching the show. Perhaps I have accomplices,” Yao Fei countered Su Hui. “Aren’t you afraid that I’ve already placed the bomb in the main building?”

Yao Fei possessed a pair of peach blossom eyes. When he smiled, it would relax one’s vigilance and make him feel trustworthy. However, when he lowered his eyelids, his gaze resembled that of a fierce wolf.

Su Hui whispered, “That’s why I came to find you.”

Yao Fei exhaled a puff of smoke, his gaze fixed on him. “I have some questions I want to ask you.”