"Is it because of Liu Qin's incident that our police asked you to cooperate with the investigation, which puts you under pressure?"

Han Feilu was not just talking. He was indeed very concerned about Zhou Song and began to analyze the reasons for him.

Zhou Song was indeed under pressure, but not because of Liu Qin, but because of the box of watercolor brushes and other items sent to his home. He was worried that he had quietly split into two people without knowing it. Before meeting the psychologist, he had been worried about this matter, and after meeting the psychologist, it was better not to see him. However, at this time, Han Feilu seemed to have replaced the psychologist. Although his words were rough and he was not very patient, he had a lot of sincerity, so he felt good about talking to him.

Zhou Song smiled and said, "If I said yes, would you no longer bother me because of Liu Qin's affairs?"

Han Feilu told the truth: "No. I will always bother you until the end of this case."

There were not many people in the square, and the eyes were filled with green trees and the breeze was blowing, which was cool and pleasant. Zhou Song said: "Let's go."

The two walked slowly in the lawn road, and Zhou Song asked, "So this time you are looking for me for Liu Qin's case?"

Han Feilu raised her hand and folded a willow branch, held it in her hand and played with it: "For Liu Qin and Pan Shaojie."

Zhou Song: "What's wrong with Pan Shaojie?"

Han Feilu: "I suspect that he and Cai Minmin's death are inseparable. He has a man named Feng Danian. Do you recognize him?"

Zhou Song: "Although I am closer to him, I don't know any of his friends."

Han Feilu: "It's not his friend, but the manager of the nightclub lobby. On the day Cai Minmin died, he sent Cai Minmin home. Although Cai Minmin was alive at that time, he died the next day. We found a few grams of methamphetamine at Cai Minmin's house, and Cai Minmin died of overdose, so we thought Cai Minmin's death was an accident at that time. Until yesterday I found the source of the drug. The few grams of methamphetamine at Cai Minmin's house were goods from a dealer named Xiong Liang. Xiong Liang admitted that he went to the back door of Tianshang and Earth to deliver goods to Feng Danian at around 11 pm on May 14. But the next day, the goods appeared at Cai Minmin's house."

Zhou Song: "You suspect that Cai Minmin died in a trap now? It was Feng Danian who intentionally instigated Cai Minmin to take drugs, which led to her being poisoned and died?" He shook his head, "This plan is not very operational. Even if Feng Danian really intends to kill Cai Minmin with this plan, how can he guarantee that Cai Minmin will voluntarily inject excessive methamphetamine? As you said just now, Cai Minmin died the next day, and she was the only one in the family at that time. Does Feng Danian have a way to remotely manipulate her actions?"

Han Feilu wrapped the willow branches in circles and into her hands: "This is the suspicion. Last night we went to find Feng Danian. He was missing. His disappearance just proves that he is suspicious. I suspect that he was the murderer who killed Cai Minmin, but I don't know what method he used. Even if Cai Minmin is addicted to drugs, he is unlikely to get up in the morning, and he will inject meth into the night before when she was in a hangover the night before. And she should be very clear about how much dose she can bear, and there is no reason to make a mistake to kill herself. Could it be that Feng Danian is waiting for her to make mistakes? Then the uncertainty of this plan is too great."

Zhou Song frowned and thoughtfully, and walked aside the willow branches on his shoulder for a while before saying, "You have always said that Cai Minmin died of excessive drug injections. She didn't take it, but she was injected with a syringe, right?"

Han Feilu: "Yes."

Zhou Song: "When you found the body, how many syringes were there?"

Han Feilu: "A dozen or so, seven or eight have been used, and a few have not been opened."

Walking out of the small path, I arrived at a fan-shaped square, with a sculpture standing in it, and a vending machine next to it. Zhou Song said, "Wait for me here." After that, he walked towards the vending machine, scanned the code to buy two bottles of cold green plum green tea. He walked back with the drink and saw Han Feilu looking at the sculpture in the center of the square; it was an irregularly shaped sculpture nested together by several elliptical rings, each of which was painted with paint of different colors. However, it has been a long time since the wind and rain, and the paint has fallen off severely, revealing their gray-brown appearance.

He handed a bottle of drink to Han Feilu and smiled and said, "This is an apology."

Han Feilu turned her back to the statue a little deliberately, and caught the drink: "You can only make up for the trauma in my heart if you give me Yunnan Baiyao."

Zhou Song's eyes flashed lightly from the statue, took a sip of water, and asked again: "Have you done an autopsy for Cai Minmin?"

Han Feilu: "It only started yesterday. Because no traces of criminal crime were found at the scene, Cai Minmin's parents did not agree to the autopsy. Yesterday, Xiong Liang was found, and Cai Minmin's family agreed to the autopsy. However, it took several days to delay."

Zhou Song: "Have you checked her case and medical records?"

Han Feilu: "I checked that she came to Yucheng for a year and only stayed in the hospital for two days three months ago due to acute enteritis. Other minor illnesses and pains may have been solved by buying medicine or going to a private clinic."

This situation is very common. Many people from other places who come to work in big cities can avoid going to the hospital all year round in order to save money. If they have illnesses, they either take their own medicine or go to cheaper small clinics. Therefore, it is difficult to find their medical records.

Zhou Song took a few steps back and stood in the cold shade. Han Feilu followed him and said, "You asked so much, do you want to help me analyze it?"

Zhou Song put the water bottle in his neck to cool himself down: "I have an immature conjecture, but there is no evidence to prove it."

Han Feilu: "Tell me, I won't blame you if you guessed it wrong."

Zhou Song said: "My thoughts are the same as you. I also think that Cai Minmin himself is unlikely to make mistakes, and Feng Danian and others are even less likely to make mistakes. If Feng Danian is really the murderer, then he must have a complete plan to ensure that Cai Minmin can die at his own hands."

Han Feilu: "What plan?"

Zhou Song: "The drug was injected by Cai Minmin himself, and there is no dispute. But is there a situation where Cai Minmin didn't know that the syringe was filled with drugs, but regarded it as a kind of... drug?"

Han Feilu was very smart and was very good at learning from one example: "You mean, Cai Minmin may suffer from a certain disease, which requires her to inject a certain drug regularly and regularly. On the morning of the incident, she injected herself with drugs like before, but she did not know about it."

Zhou Song nodded: "This plan is easy to implement. You only need to replace the medicines she prepared for drugs in advance. If she has the habit of injecting the medicine into the syringe in advance, then you only need to change the syringe. There are many diseases that require long-term injection of drugs, such as gynecological inflammation or diabetes. Considering that you have not issued an autopsy report and cannot find her detailed case, it is recommended that you check her consumption records and ask your friends around her that she may have purchased some kind of medicine herself, or ask your friends to help her buy some kind of medicine."

Han Feilu had five words written on her face, "Great gratitude is not thankful", patted his shoulder vigorously, and walked a few steps away to make a phone call. After he arranged the work, he walked back and found that Zhou Song was no longer under the shade of the tree, and was standing next to the sculpture in the center of the square.

He walked to Zhou Song, looked at the sculpture, and said, "It was only when I saw this sculpture that I remembered that this was the place where Wei Chunhong was buried."

Ten years ago, this square was also a construction site and the scene of the Wei Chunhong case. The sculpture faced 1.3 meters west, which was where the police dug out Wei Chunhong's body.

Zhou Song touched the sculpture, and the patent leather on the surface fell down. He patted off the gray stains in his palm and slowly paced around the sculpture: "When was this built?"

Han Feilu stood there without moving: "I can't remember the specific time very clearly, it should be around September 20, 2012."

On September 20, 2012, five days after Wei Chunhong's body was discovered, the sculpture was built and has stood still to this day.

Zhou Song walked around the sculpture and returned to Han Feilu: "You just said that you were looking for me for Pan Shaojie and for Liu Qin. You have finished talking about Pan Shaojie, and now you are talking about Liu Qin."

Han Feilu: "It's better to reiterate the old words. Liu Qin asked you on the night of the 14th. What did he say to you?"

Zhou Song: "Is it very important?"

Han Feilu: "Of course it's important. He hasn't contacted Lan Lan for many years, but he went to find Lan Lan when he met you, and still sneaked into Lan Lan's house. Don't you find it strange?"

After he asked, Zhou Song also felt strange, and thought about it carefully, saying, "That night he came to me with a box of fountain pens."

Han Feilu: "What pen?"

Zhou Song looked towards the direction of the highway: "Did you drive?"

Han Feilu: "Stop at the intersection."

Zhou Song said: "Let's go to Lan Lan's house to take a look. If you are lucky, you can find that box of pens."

On the way, Zhou Song explained in detail the origin of the box of pens: "Wei Chunhong is the head teacher of our class. She teaches English. In addition to our class, she also teaches Class 5 and Class 13. One day she bought a box of pens and got it into the class, saying that it was rewarded to students who can get over 90 points in the next month's English test. There were 10 pens in total, and she used one by herself, and there were 9 left. Until the monthly exam, 7 students in the three classes had scored 90 points, including me and Lan Lan. Apart from the one she used, there should be only 2 left in the box. However, Liu Qin accidentally found the box of pens at home a few days ago and came to me with a pen, but there were still 3 in the box."

Han Feilu didn't see what Zhou Song said in the case file: "One of them belongs to Wei Chunhong?"

Zhou Song shook his head: "No, Wei Chunhong is used to carrying the pen in his bag, but when the police checked the relics in the bag with Wei Chunhong's family, they did not find the pen. At that time, everyone thought it was a trivial matter. Wei Chunhong might have accidentally thrown the pen and put it in the office or somewhere in the house. Until 10 years later, Liu Qin found the box of pens and found that there were three more, one of which was used and contained blue ink. If Wei Chunhong used it himself, she would use red ink. I often went to her office, and she only used red ink."

Han Feilu: "Is it because she sent a used pen to the student and took it back?"

Zhou Song: "This explanation is the most convincing. But—"

He wanted to speak but stopped, his face was solemn. Han Feilu glanced at him: "But what?"

Zhou Song: "When Liu Qin discovered that Wei Chunhong's pen disappeared, he suspected that I was the murderer, and naturally he also suspected that I took the pen. He searched my schoolbag in the police station and found a pen with the same style as Wei Chunhong. He thought he had caught the murderer, but he didn't know that the pen was the prize I got. There were six people besides me. He didn't believe it, so I took him back to school, called all the people who got the pen, and took out the pen he got in front of him, and he gave up. But everyone took out the pen back then, but he found a used pen in the pen box, and it was a pen that Wei Chunhong had sent out and took it back. Explanation--"

He suddenly felt that the air conditioner in the car was too cold and his skin was cold, so he adjusted the button to control the air conditioner.

Han Feilu continued what he didn't finish saying: "It means that one of the pens you took out was indeed Wei Chunhong's. The murderer was among the students that year."

Perhaps it was because Zhou Song was not familiar with Han Feilu's car. After twisting for a long time, the air conditioning in the car only increased and continued to decrease. His face seemed to be frozen by cold air, as white as if it was a layer of frost. Han Feilu pushed his hand away, twisted it twice, and closed the air conditioning that was rising.

Zhou Song sighed relieved and said, "It was because Liu Qin thought of this that he came to me and wanted me to take out my pen for him to identify whether it was Wei Chunhong's one."

Han Feilu: "Did you show it to him?"

Although it is clear that Han Feilu is not targeting him personally, but is just investigating the scope of law enforcement impartially. However, Zhou Song is still very reluctant to be questioned by him in an interrogative tone. "No, I don't know where I threw it."

Han Feilu took care of his emotions and stopped asking: "After looking for you, he went to Lan Lan. Maybe he wanted to confirm whether Lan Lan's pen was the one that Wei Chunhong lost."

When he arrived downstairs of Lan Lan's house, Han Feilu parked the car by the corridor and went upstairs with Zhou Song. Lan Lan's house was blocked with seals and there were two roadblocks. Han Feilu lifted the obstacles one by one, pushed open the door and walked in first. Zhou Song followed closely and walked to the bedroom. There were still blood on the door frame and the floor at the door. He seemed to see Liu Qin slid to the ground little by little with the door frame and said to him, "Save me." Then, he saw himself, a person who wanted to see him but not save him, and was even excited about Liu Qin's impending death, a person who was as cruel and ruthless as a poisonous snake.

At this time, he was shocked that he had such a cruel and vicious thought.

Seeing that his face was not very natural, Han Feilu thought he couldn't stand the tragic murder scene, so she said, "You go to the living room to wait." After that, she closed the bedroom door.

Zhou Song walked a few steps into the living room and could hear Han Feilu rummaging around in the bedroom.

Han Feilu asked loudly: "What does that box look like?"

Zhou Song: "A green biscuit box with Japanese printed on it."

After a while, the bedroom door suddenly opened. Han Feilu walked out with a green iron box and asked, "Is this one?"

Zhou Song took the box over and opened the lid, leaving only two pens left inside: "One missing."

Han Feilu took off both pen holders and the ink tube was clean, which showed that it was brand new, saying, "What is missing is the used one."

Zhou Song: "Has Lan taken away?"

Han Feilu closed the lid, put the box under his armpit, and walked out with his arms around Zhou Song's shoulder: "It seems that it is only her. Let's go out quickly. You don't have to stay in such a place. If you stay for a long time, it will easily turn into a Earth-bound spirit."

Zhou Song asked him what the Earth-Binding Spirit is, but Han Feilu didn't explain, just scaring him: "This thing is as difficult as a little ghost. If you say a few more words, it will go to you tonight."

Zhou Song rolled his eyes to the horizon: "Childish."

He was taken back to the police station by Han Feilu because he helped the police find the physical evidence that was missed by the police. In order to make the link of evidence linked together, Han Feilu needed him to make another record. Zhou Song followed him upstairs and caused a lot of commotion when passing through the office area. Not only because he visited the door several times, he left a deep impression on the police, but also because his face was too outstanding, so people looked at him everywhere.

Han Feilu is like a mountain king who has returned from a robbery. She hugged Zhou Song as if she was showing off her spoils: "Give the single women here a chance, who would like to record the Zhou Shao?"

He was used to jokes, and the policewoman here just laughed, but he didn't say anything. Only Mu Xuecheng raised his hand stupidly: "I, I, me!"

Han Feilu: "Okay, I'll give you the opportunity, don't be useless." As he said that, he pushed Zhou Song forward, "Go."

If it weren't for so many pairs of eyes staring at him, Zhou Song would have wanted to punch Han Feilu twice. He turned around and glared at Han Feilu secretly, then adjusted his elegant and decent smile and walked towards Mu Xuecheng.

Han Feilu went to find Gu Hai, opened a chair next to Gu Hai's office, and sat down: "What disease does Cai Minmin have? What medicine is taking now?"

In the square, he called Gu Hai and asked Gu Hai to investigate whether Cai Minmin had purchased prescription drugs.

Gu Hai said: "I just contacted a fellow villager in Cai Minmin. She works in a pharmacy. According to her, Cai Minmin suffers from type 1 diabetes and often asks her to buy insulin. Because she can buy it at a cost price, Cai Minmin always transfers the money to her in advance and she buys it directly. This is also the reason why we have never found her record of buying insulin."

Han Feilu couldn't help but look at Zhou Song, and a complicated smile appeared on her face: "This young master's words are all right."

Gu Hai asked again: "I also checked the syringe found in Cai Minmin's trash can as you said. One of them contained not drug residue liquid, but insulin."

Han Feilu sat on the chair and stretched her waist: "Okay, the case has escalated and has not been run away. I am going to issue a joint investigation notice from various police stations. Feng Danian is searched throughout the city."

Gu Hai: "Yes."
To be continued...