Meng Yanchen looked at Fan Shengmei, his eyes filled with both worry and trust. "Approaching Chen Feng is dangerous; you must be careful. We can't alert him again. This time, we must strike decisively." Fan Shengmei smiled slightly, her eyes resolute. "Don't worry, I know what I'm doing. I'll approach him from the sidelines, without letting him notice anything amiss." The two exchanged a glance, their minds in perfect harmony. A secret investigation into Chen Feng was about to begin.

The next morning, sunlight streamed through the window onto the desk piled high with documents. Meng Yanchen and Fan Shengmei, looking slightly tired but focused, discussed their investigation plan for Chen Feng. Meng Yanchen tapped his fingers lightly on the table and said, "We'll first arrange for reliable people to collect evidence of Chen Feng's connections with the outside world, especially his dealings with competitor companies. You approach him from within the company and see if you can get any useful information out of him." Fan Shengmei nodded, "Okay, I'll find an opportunity to contact him, but I'll need a suitable reason."

After making the arrangements, Fan Shengmei began to keep an eye on Chen Feng's movements within the company. While reassuring the employees, she inadvertently wandered near the break room. At that moment, she overheard two employees whispering. "Do you think the company's plan leak might be related to Manager Chen? I heard he's been acting a bit strange lately," one voice said. The other voice responded in a low voice, "Shh, don't talk nonsense. It'll be terrible if they hear us. But I also think it's a bit suspicious; he asked me some details about the plan before."

Fan Shengmei's heart skipped a beat, but she remained outwardly calm and continued walking as if nothing had happened. After the two employees left, she quietly turned around and began to secretly investigate them. She started by checking their personnel files, reviewing their work experience and daily performance, but found nothing obviously abnormal. However, she did not give up and decided to investigate their daily behavior and social relationships.

Meanwhile, Meng Yanchen sat in his office, carefully analyzing the recent attack methods of his competitor. He frowned as he looked at the numerous documents spread across his desk. These attack methods seemed chaotic at first glance, but upon closer examination, he discovered similarities to clues from the mysterious investment group he had encountered previously. The precise targeting and the familiarity with the Fu Group's weaknesses were beyond the capabilities of ordinary competitors. A sense of unease rose in Meng Yanchen's heart; he suspected that the mysterious investment group was behind this escalation of the attacks.

Meng Yanchen picked up the phone and called the investigation team. "Focus your investigation on any recent activities related to the mysterious investment group, especially their connections with competitor companies. Also, keep this confidential and don't alert them." After hanging up, he leaned back in his chair, his gaze deep as he considered his next strategy.

While investigating two employees, Fan Shengmei discovered through the company's surveillance system that they frequently visited a secluded coffee shop after get off work. She decided to go there herself. That evening, Fan Shengmei arrived at the coffee shop and chose a corner seat. A short while later, the two employees entered and sat near the window. Fan Shengmei ordered a coffee and casually observed them.

After exchanging a few quiet words, one of them took out his phone, seemingly checking some information. A thought struck Fan Shengmei. She quietly got up and moved to a seat closer to them, pretending to get some seasonings. Just then, she glimpsed a transfer notification on one of their phone screens, the recipient being an unfamiliar account. Alarmed, Fan Shengmei returned to her seat and quickly took a picture of the account with her phone.

Upon returning to the company, Fan Shengmei immediately handed over the account information to the technical department, asking them to help investigate the account's origin. After some effort, the technicians told her that this account had frequent financial transactions with a mysterious account, and that the mysterious account's transaction records were very complex, seemingly concealed by multiple layers.

Fan Shengmei told Meng Yanchen about her discovery. Meng Yanchen looked at the account information displayed on the computer screen, his expression turning serious. "It seems the person behind this mysterious account is no ordinary person; they are very likely the key figure we're looking for. Let's dig deeper and see if we can find any connection between this account and Chen Feng or the mysterious investment group."

Fan Shengmei returned to her office and continued investigating the clues surrounding the mysterious account. She discovered that several large sums of money had flowed into the account a few days before the company's plan was leaked, but the source of the funds was untraceable. She followed the flow of these funds, trying to find more clues.

As the investigation deepened, Fan Shengmei became increasingly convinced that the two employees were involved in the leak of the plan. However, without concrete evidence, she couldn't act rashly. She decided to start by investigating the two employees' social circles to see if she could find more clues.

On Meng Yanchen's side, the investigation team reported that they had discovered a competitor had recently been in contact with a mysterious organization whose modus operandi was remarkably similar to that of the mysterious investment group. Meng Yanchen's suspicions deepened; he knew this crisis was far more complex than he had imagined.

While investigating the social relationships of the two employees, Fan Shengmei discovered that they also had dealings with several marginalized figures within the company. Through contact with these individuals, she subtly inquired about their backgrounds. One of them casually mentioned seeing Chen Feng talking with the two employees in a secluded corner of the company, looking extremely nervous.

After Fan Shengmei told Meng Yanchen the news, they both realized that the relationship between Chen Feng and the two employees was unusual. Meng Yanchen said, "It seems we're on the right track. Chen Feng is very likely one of the moles, and these two employees are his accomplices. Now we need to find evidence as soon as possible and bring them all to justice."

Fan Shengmei continued her search for evidence within the company, meticulously examining the company's web logs, hoping to find records of communication between the mysterious account and company personnel. After several hours of careful investigation, she finally discovered some clues. The web logs showed that the mysterious account had briefly connected with Chen Feng's work computer the day before the company planned to leak information.

Fan Shengmei excitedly told Meng Yanchen about her discovery. Upon hearing it, a cold glint flashed in Meng Yanchen's eyes. "Good, this is important evidence. But we need more evidence to ensure we're absolutely certain. Continue the investigation and see if we can find out the specific content of their communication."

Fan Shengmei didn't slacken her efforts; she continued her investigation. She tried to find more clues by recovering deleted files from Chen Feng's computer. After much hard work, she finally found an encrypted file. Fan Shengmei handed the file to the company's technical experts, and after decryption, the file's contents were astonishing.

The document detailed how Chen Feng and the person behind the mysterious account planned to leak the company's plans, as well as the distribution of profits among them. As Fan Shengmei and Meng Yanchen read the document, the mysteries in their minds gradually unraveled. But they also understood that this was just the tip of the iceberg; the mysterious investment group behind it all was the real threat.

However, just when Fan Shengmei and Meng Yanchen thought they were about to uncover the truth, a new problem arose. Technical experts told them that while the document could prove Chen Feng's involvement in the leak, its source might be disputed, and it might not be strong evidence under the law.

Fan Shengmei and Meng Yanchen fell into deep thought. They knew they needed to find more conclusive evidence to bring Chen Feng and the forces behind him to justice. Meanwhile, the company's crisis continued, and the attacks from competitors did not stop despite their investigation.

In the company corridor, Fan Shengmei watched the anxious employees coming and going, secretly vowing to find out the truth as soon as possible and help the company overcome the crisis. Meng Yanchen stood in front of the floor-to-ceiling window in his office, looking at the bustling city outside, pondering his next plan.

Were these two employees the mole who leaked the plan? Who is behind the mysterious account? Will Fan Shengmei and Meng Yanchen be able to find conclusive evidence and uncover the conspiracy of the mysterious investment group? Everything is still unknown, and their investigation continues…