If this case is simply about poisoning people's lives and putting the blame on others, in order to achieve the purpose of cracking down on the "Ruixiangxuan" tea house.
That can be completely classified as a bad act carried out for commercial interests, and the method is extremely despicable.
But what if this is not the case?
Then the nature of this poisoning and murder case has completely changed.
Someone knew in advance that the victim Zhang Taijiang was already suffering from a certain disease, and then used professional means to induce the attack of the victim Zhang Taijiang's disease, resulting in the victim Zhang Taijiang's sudden illness and death.
However, the victim Zhang Taijiang died not at home, but in a public place, thus involving innocent people.
If this is the case, it can be inferred that the victim Zhang Taijiang was deliberately killed by someone.
Following this line of thinking, it is necessary to find out the identity, background and social relationships of the victim Zhang Taijiang as soon as possible in order to accurately sort out the reasons for his murder.
As for whether the victim Zhang Taijiang was killed because of hatred, whether he was killed for love because of an entanglement with someone, or whether he was silenced because he knew someone's privacy, it depends on the clues collected during the investigation and the specific analysis results.
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But one thing is beyond doubt, that is, Deng Chengfeng was definitely not the one who poisoned the victim Zhang Taijiang.
If Deng Chengfeng had a grudge against the victim Zhang Taijiang, even if he wanted to get rid of the victim Zhang Taijiang, he would not be stupid enough to kill someone in his own teahouse.
Not to mention that Deng Chengfeng is not a person who engages in such illegal activities. Even if he takes risks for some purpose to make the victim Zhang Taijiang disappear, then he has plenty of opportunities to do it elsewhere. How could he let himself be involved?
What's more, when the victim Zhang Taijiang died of poison, Deng Chengfeng was at the scene. If he was the murderer, wouldn't he even know this taboo?
After first ruling out Deng Chengfeng's suspicion, Yong Ming led Xie Liuyun and others to focus on the exterior of the "Ruixiangxuan" teahouse.
Of course, after inspecting the site, Yong Ming still made some discoveries.
However, Yong Ming did not choose to inform Xie Liuyun and others of his discovery. Instead, he wanted to confirm it before officially making it public as an important clue.
After arranging for Yong Quanshi to conduct a one-by-one investigation of the merchants who had business dealings with the "Ruixiangxuan" tea house, Yong Ming took Sheng Qingfeng and Huang Hanhan to the Hangzhou Police Station and the Justice Bureau to discuss the poisoning and murder case.
Learn about other situations.
Yong Ming and Xie Liuyun and Shang Baifeng, who were responsible for investigating the situation of the victim Zhang Taijiang, agreed to meet at five o'clock this afternoon. The meeting place was the "Ruixiangxuan" teahouse.
Now, the "Ruixiangxuan" teahouse has been ordered by the police station to close down for rectification due to involvement in a murder case.
The Deng family only left two assistants in the "Ruixiangxuan" teahouse to take care of the entire shop.
This deserted, undisturbed place is exactly the best place for Yong Ming and others to discuss the case.
In such an environment, the clues collected by all parties can be easily verified and scrutinized on site, often with unexpected results.
Monk Xie Liuyun and Baifeng, who separated from Yong Ming, Sheng Qingfeng and Huang Hanhan yesterday morning, did not return to the Hangzhou branch of the "Yong Ran Pavilion" to rest last night in order to improve the progress of the investigation.
After finishing their busy visit to the hospitals and clinics where Zhang Taijiang had visited last night, it was already late at night. Xie Liuyun and Shang Baifeng thought that they would not disturb Yong Ming and the others.
After a hearty late-night snack, Xie Liuyun and Monk Baifeng, who was feeling warm all over, found a verandah that could protect them from the wind and cold, found a seat, and sat down.
They were quietly communicating and discussing the case, sitting next to each other, warming each other, and enjoying themselves.
After agreeing on the arrangement of taking turns on guard duty, Xie Liuyun and Shang Baifeng took turns to rest after getting tired from the exchange.
Under such circumstances, the two of them spent the whole night fooling around.
At six o'clock this morning, Xie Liuyun, who was on duty, woke up Shang Baifeng and started today's case investigation.
The two simply had breakfast at a street food stall, and then conducted undercover investigations into the remaining three clinics according to the order of investigation based on the medical records and medical prescriptions retrieved from Zhang Taijiang's home.
Zhang Taijiang's home had actually been inspected by the police.
When Xie Liuyun and Shang Baifeng went there, they made it clear that they were the clients of the Deng family and that they came to the house to investigate who was the murderer of Zhang Taijiang. To their surprise, they were not made difficult or obstructed by Zhang Taijiang's father.
Zhang Taijiang's father seemed to have serious doubts about Zhang Taijiang's death at the "Ruixiangxuan" teahouse.
From the exchange with Zhang Taijiang's father, Xie Liuyun and Shang Baifeng also learned some about Zhang Taijiang's personal habits.
For example, Zhang Taijiang has a long-term habit of drinking tea, and he likes drinking tea very much, especially Longjing tea.
Zhang Taijiang is a person who has no other hobbies. Apart from drinking tea, he just likes to play with flowers and plants.
However, one thing is more suspicious, and that is what Zhang Taijiang was engaged in, which his father could not explain clearly.
You can say that he is a working person. The time when he leaves home and comes back home is never fixed.
You have to say that he is a businessman, but I have never seen him earn a lot of money.
Looking at the decoration, area and furnishings of Zhang Taijiang's home, it seems that it is not a very wealthy family.
From this point of view, Zhang Taijiang's family does not look like a well-off family engaged in business and trade.
Regarding this aspect, Xie Liuyun feels that it is necessary to pay special attention to it and conduct in-depth understanding.
Xie Liuyun was quite surprised when he rummaged through the bookcases in Zhang Taijiang's home study and found the medical records and medical prescription receipts that Zhang Taijiang used when he saw a doctor.
He didn't know why, but the police did not notice the medical records and medical prescription receipts stored in Zhang Taijiang's bookcase, nor did they take them away.
But in Xie Liuyun's view, this is no less than a major discovery.
There are seven or eight medical records that Taijiang kept alone, plus a thick stack of medical prescription receipts, which shows that there is something wrong with his body.
This situation is in line with Yong Ming's assumptions about Zhang Taijiang's personal situation after inspecting the crime scene - the "Ruixiangxuan" teahouse yesterday.
Xie Liuyun suppressed the excitement in his heart and calmly received these medical records and medical prescription receipts into his shoulder bag.