The procedure for investigating a missing case is fairly simple.

Generally speaking, it starts with the missing person’s phone records, video surveillance information, and places they frequently visit.

The thing that took a little bit of time was comforting Wang Feng’s parents.

After Wang Feng was expelled from the police force last year, it was actually Wang Feng’s parents who were the most affected.

Because they didn’t know the real reason behind Wang Feng’s expulsion from the police force.

This is the most brutal aspect of undercover work. When Wang Feng, Yang Lin, Lu Chuan, and Zhao Tianyu were dining together and dared to mention something about their work, it was because they were all police officers.

But Wang Feng couldn’t reveal any information to his family or parents.

Because it’s best for family members not to know about his situation.

On one hand, if Wang Feng’s parents knew he was going undercover, regardless of whether they agreed or not,

what kind of work is undercover? Even ordinary people can guess. If his parents knew Wang Feng was doing this kind of work, wouldn’t they worry about him every day?

On the other hand, it was also to protect Wang Feng’s parents. If Wang Feng’s parents knew he was undercover, once the other party tried to test him through some means, Wang Feng’s parents might inadvertently give it away.

So, the best scenario is that Wang Feng’s parents don’t know the real reason he was expelled.

During this period, the relationship between Wang Feng and his parents was very poor.

The two elders worked hard to raise their son, who graduated from police academy and finally got into the police force, only to be expelled just days later, which felt like a lifetime of effort wasted.

How can a normal person accept such a result?

On the day Wang Feng was expelled, he had a big fight with his father, then took the chance to move out.

From that day on, Wang Feng started hanging around various entertainment venues, internet cafes, and karaoke bars.

The reason for his expulsion was very simple: he accepted a bribe from a suspect.

This was also the reason he got involved with the suspect who bribed him at the time.

That’s how he went undercover around Target Number 4.

For over a year, Wang Feng barely returned home and had very little contact with his parents.

This is also why Yang Lin called Wang Feng’s parents to notify them to report the case.

"Uncle, aunt, the situation of Wang Feng’s disappearance is very complicated, but we can’t divulge anything now. It’s partly for Wang Feng’s safety and also considering your safety."

Wang Feng’s parents are intellectuals, and with a slight hint from Lu Chuan and Yang Lin, they could roughly piece together the situation.

"Lu, I just want to ask one thing: did Wang Feng really not take any money at the time?"

Lu Chuan and Yang Lin exchanged a glance, did not speak, but lightly nodded.

Wang Feng’s father was stunned for a moment, and his eyes started to redden uncontrollably.

Ha ha!

He knew his son whom he raised for decades, how could he accept a bribe and be expelled?

But his son wasn’t really as he appeared during this period, which comforted Wang Feng’s father.

However, now that Wang Feng is missing, he started to worry again.

"Lu, Yang, you... you must bring him back!"

At this point, Wang Feng’s father, with a thousand words in his heart, could only say one thing.

Find his son first, and once he is found, everything will be manageable.

After sending off Wang Feng’s parents, the three began to discuss where to start the investigation of the case next.

Zhang Hui had extensive experience in this field, and the arrangement was well-organized.

Yang Lin personally applied to the director for a meeting room, where Zhang Hui and Lu Chuan worked.

"I just checked Wang Feng’s phone records before he disappeared, nothing special, he received one call at the time."

Yang Lin printed out Wang Feng’s phone records: "It’s confirmed, the call was from a food delivery guy. According to the feedback from his side and order verification, it was confirmed that on the night Wang Feng disappeared, he ordered fried rice cakes and a mango ice cream."

"What time was it?"

"Three nights ago at 11:30 PM."

"So late, and Wang Feng was having fried rice cakes, something that’s hard to digest?"

Zhang Hui frowned and looked at Lu Chuan: "When you were in school, did Wang Feng have a habit of eating late-night snacks?"

"No, Wang Feng was quite regular with his diet at school, not fond of snacks, and hardly drank beverages."

"Old Lu, there’s one more thing, do you remember Wang Feng seems to be allergic to mango?"

"Hmm?"

"He never ate mango in the dorm, I once forced him to eat two bites, and each time his lips swelled up like sausages."

Yang Lin’s words reminded Lu Chuan: "You’re talking about that time during sophomore year, right?"

"Yes, I remember it was sophomore year, hold on, I’ll call Wang Feng’s dad to verify this."

Soon, the call was connected.

"Uncle, it’s me, Yang... Hmm, we remember from college Wang Feng didn’t eat mangoes, he’s allergic to mango, is that right?"

"Alright, I understand."

After hanging up, Yang Lin nodded affirmatively: "Confirmed, Wang Feng is allergic to mango."

"Since Wang Feng is allergic to mango, why would he order mango ice cream in the middle of the night?"

"Simple, at that time in his apartment... he wasn’t alone!"

West Mountain Road, Huijia Garden District.

"After Wang Feng had a fight with his dad, he moved out of the house, but he didn’t rent another place."

Back then, Wang Feng had only just graduated from college a few days before, definitely with no savings, and after the argument with his family, where would he get the money to rent a place?

This is a place Yang Lin had visited once: "It’s an apartment allocated by Wang Feng’s dad’s early employer, very small, and had been unoccupied. After the argument with his family, Wang Feng moved in here."

"Let’s go up and take a look first. Later, Lu Chuan will conduct a survey here. It’s basically certain that Wang Feng’s disappearance time is three nights ago."

"If the other party had been in Wang Feng’s apartment, they would surely have left traces—fingerprints, skin flakes, hair—as long as we can identify these, we might be able to ascertain the other party’s identity." 𝘧𝑟𝑒𝑒𝘸𝘦𝘣𝑛𝑜𝘷𝑒𝓁.𝘤𝘰𝓂

Zhang Hui’s assessment was also shared by Lu Chuan.

"And Captain Qin mentioned, in some hidden place in Wang Feng’s home, there might be a hidden phone, see if we can find it."

Although Qin Yong didn’t tell Zhang Hui and Lu Chuan the specifics about Wang Feng’s undercover work, he did inform them about the emergency contact method with Cai Yongqiang.

Besides the agreement for Cai Yongqiang to meet Wang Feng alone at a specific place on the 13th of every month, they also had an emergency contact method.

Wang Feng would check a hidden phone daily or regularly.

The phone had no one’s contact information, and Cai Yongqiang wouldn’t send text messages, just make calls.

For safety, the phone used by Cai Yongqiang to call wasn’t his own or a landline from the Anti-drug Detachment but an unregistered number.

As long as Wang Feng saw a missed call, regardless of what number it was, it meant there was an emergency from Cai Yongqiang.

This phone most likely should be hidden in Wang Feng’s residence since he checked and charged it daily or regularly. It would be inconvenient if stored elsewhere.

"Finding this phone would likely mean Wang Feng is safe."

Lu Chuan and Yang Lin understood Zhang Hui’s implication: if the phone was still there, it indicated Wang Feng’s identity hadn’t been discovered by others, but if it was gone, Wang Feng’s situation might be dire.

Building 3, Unit 2, 402.