Although the people in the criminal department have been exposed to more homicide cases, there are not many cases of poisoning and murder. Most of the criminals who dare to kill are extremely vicious people, and only a very small number of women who are really forced to kill dare to kill. When a man commits a crime, he is more direct to kill people either with murder weapons, that is, knives, sticks, etc., or with common tools such as ropes, and does not need to use poison to kill people. Only some women who are inferior to the deceased in strength will use poison to kill people in order to be able to kill, in order to be able to ensure that the action is completed without fail. And these criminals who use poison to kill people use the poison that is more common arsenic and so on. Therefore, the people in the Criminal Department knew almost nothing about this strange poison, and they wanted to know more about this from Qin Tai.

The physicians came into contact with a lot of herbs, but most of them were used to treat diseases and save people. Ordinary doctors don't like to study this kind of thing, for them they save people and don't touch things that hurt people. Therefore, in terms of using poisons and detoxifying patients, Tai Yi is almost the same as ordinary doctors, and does not have any special skills. The studious doctors also wanted to know more about this knowledge, and they usually didn't have the opportunity to learn, so they just took advantage of this opportunity to consult Qin Tai more.

The people in the Criminal Justice Department are the agencies in charge of all kinds of murders in the palace, and although they know a lot about the methods of secretly poisoning people, they also know a little about it. They also hope that Qin Tai will explain and answer everyone's doubts in a systematic way, so as to provide a basis or guide for them to investigate and handle cases in the future. The people in the Criminal Division are more arrogant, and they don't like to get along with people, so it's rare to ask others for advice in such a low way.

Qin Tai will not put up a fight first, and secondly, he also hopes that everyone will learn more, and he will not be in a hurry in the future because of the same case. Qin Tai asked his wife Zhan Xiaoxiao to pay attention to the reaction of the dim sum in the medicine bottle, and at the same time came together with everyone to explain his understanding of poison to everyone in a tone of learning from each other. A few young people with more flexible brains hurriedly pulled a few benches from the side and let everyone sit together and talk. A young man offered to watch at the gate, and if outsiders came in, he could alert everyone. This young man's master is very satisfied with the young man's behavior, at least this young man is not stupid and is a good object to cultivate.

Poisons are divided into three types from material vendors, the first of which is made from plant raw materials. Poisonous plants take their most poisonous parts, such as their roots, stems, leaves, flowers, fruits, etc., and refine them to make poisons. The second is extracted from animal raw materials. Animal hair, internal organs, saliva, blood, claws, etc., are either used directly, or processed and refined, or crushed into powder and so on to make poison. The third is mixed poisons, which use one or several plant and animal poisons and mix them together to make a mixture of poisons that are more difficult to crack. Not only is the effect better, but it is also difficult to detoxify or relieve.

In terms of medicinal properties, poisons are divided into two types: chronic poisons and highly toxic poisons, and general poisons can also be said to be divided into three types. The so-called chronic poison refers to the incubation time of toxicity after poisoning, which is generally more than half a year or even a few years. This poison is relatively poisonous, making it impossible to detect and determine the time of the poison, and the poison slowly corrodes the body of the poisoner. When the poisoned person finds out that he has been poisoned, he or she generally has no chance or time to detoxify. Poison is more terrible than chronic poison, the poisoning of the poisoned person begins, generally no more than half a day, and some highly toxic poisons can kill the poisoned person immediately. For example, Heding red, arsenic, etc., generally do not live for a cup of tea after taking it. The time it takes for a cup of tea to be converted into the current society is about five to ten minutes. In the era when medicine was not developed in ancient times, this was a very short time, and even if there was an antidote, it was too late to take the detoxification, so people who suffered from this poison could be said to have no cure and would definitely die. Ordinary poisons can cause the poisoned person to either die or be disabled, and may also cause the poisoned person to be paralyzed or lose consciousness, which is now known as a vegetative person. Poison makes people's poisoning reaction different, some people have convulsions after poisoning, some people are unconscious until they die after poisoning, some people even talk nonsense after poisoning, and some people behave differently after poisoning. Depending on the nature of the poison and the amount of the poison, as well as the constitution and antibodies of the poisoner, even if the same poison is not the same, the seizure will be different.

Ordinary people from the Criminal Department, the Imperial Physician and the Criminal Department can test the medicinal properties of the poison, and as long as the general poison is not overdosed or the onset of the disease is too long, it can basically be saved. However, if the poisoned person is relatively weak, or a child, the medicinal properties of the poison are relatively strong or weird, it will be a big problem to rescue. There are some poisons that cannot be tested in advance, and there are antidotes that cannot be prepared after the fact, and these poisons are what everyone does not want to encounter. Among them, hidden poison, semi-poison and pull poison are problems that veterans like Qin Tai are not willing to encounter.

The so-called hidden poison refers to the poison that cannot be detected by ordinary conventional inspection methods. These poisons are not only difficult to detect, but also attack immediately after the poisoner touches or ingests them. As early as the Spring and Autumn Period and the Warring States Period, this poison was specially used by killers to assassinate important people, especially some kings or generals in the army. There are many capable people around these people or people who know medical skills, but because of the characteristics and concealment of hidden drugs, they can pass these routine examinations. When the poison kicks in, it's too late. But almost all the big people are very worried about their hidden poison, and they have strengthened their control over food. Over the years, in order to put an end to poisoning, the public has ordered that their food is either made by cronies or sent by their families, and all food that they don't know the origin of is not eaten. Even so, since Zhu Yuanzhang, the Hongwu Emperor of the Ming Dynasty, ascended the throne as emperor, the royal family surnamed Zhu still encountered thousands of poisoning incidents, and no less than 300 members of the royal family died of food poisoning. I don't know how many imperial doctors have been implicated or punished, and the total number of people who have died is no less than 10,000. Therefore, when the doctors almost hear the name of the hidden poison, their faces will change greatly, and some of the less timid ones will even not be able to eat and sleep well for several days.

The so-called semi-poisonous means that the poison itself is not poisonous, and anyone who eats it will be fine. For this reason, it is not considered a poison, and it will not be tested for toxicity. But once a second poison is encountered, it becomes highly toxic, a type of poison that belongs to the mixed poison type. This poison is not only more insidious than the hidden poison, but also has a shorter onset time, making it more difficult to detoxify. Because it takes at least two or more poisons to have an effect, it has the name semi-poison. Qin Tai has been researching for many years, and the so-called semi-toxicity is actually a kind of toxicity produced by pharmacological rejection. The drugs used are not necessarily poisons, and some very common things are also highly toxic poisons as long as they are well matched. Using the principle of rejection of medicinal properties or confrontation of hot and cold food, the poison that is not a poison may be far more harmful than ordinary poisons. Examples include river crab and persimmon, spinach and tofu, watermelon and mung beans, and so on. If you eat crab and persimmon together, you will have abdominal pain and even coma, and according to modern people, if you eat two things together, the chance of gallstones will be greatly increased. If you eat it like this for a long time, it's like cultivating stones in your body, and it's strange if you don't want to die of pain. If you cook spinach and tofu together, it may taste good, but if you have a poor constitution, you will feel uncomfortable eating it. Some people will itch all over, some will fall into a coma, and some will go into shock. If you eat watermelon and mung beans together, the mild ones will have diarrhea, and the severe ones will directly become seriously ill. Qin Tai once met this kind of person, this person was greedy for coolness in summer, eating watermelon while drinking the mung bean soup cooked by his wife. The next day, this person will be evil in the bones, what is the wind evil in the bones? The modern interpretation is that this person has had a stroke. From then on, he had to be paralyzed on the bed, waiting for someone, and there was no freedom at all. Using the principle of restraint of food or medicine, the food or decoction made is not poison but more poisonous than ordinary poison, which is the origin of semi-poison. Of course, when the poisoned person uses semi-poison, the toxicity must be more severe than this general restraint drug, otherwise it will not have the desired effect.