Behind Ma Bencai's house is a large area of farmland, and on the edge of the farmland is a rolling hill, in the middle of the hills there are countless winding paths, along these paths for half an hour, the hills become mountains, and then along the mountain road to the top of the mountain, at a glance see the magnificent Qiantang River not far away.

Between the top of the mountain and the Qiantang River, there are more than a dozen wooden houses, surrounded by wooden fences, and rows of bushes around the wooden fences. All the plants enclose the wooden houses in the middle, and if it is the height of summer, it should be very beautiful with flowers all around.

"The Divine Doctor lives here," Ma Bencai said, walking in front with some excitement, and everyone had to speed up their pace to keep up with him.

When he walked to the wooden gate in the middle of the fence, someone in the house might hear the movement, and a young boy in his teens came out, he looked at the guest, and said, "It turned out to be Boss Ma," and then turned around and entered the house.

Ma Bencai saw that the wooden door was unlocked, so he pushed it open and entered, and then walked into the door by himself without waiting for the people behind to follow.

After a while, Ma Bencai came out again, and the boy was still following him. Ma Bencai first instructed a few men carrying medicinal herbs to follow the boy to put things away, and he turned to Luo Qi and the others and said, "Come in, the divine doctor is in the house." ”

Tian Zhiyu followed Luo Qi into the house, and as soon as he entered, he smelled the aroma of various medicinal herbs, and then saw that there were all kinds of pots and pots in the house, and there was a stove burning in the corner of the room, and there was a clay pot on the stove, and the soup in it also had a slightly bitter fragrance.

At this time, an old man who came out of the back room was in good spirits, and I saw that his beard was completely white, his hair was slightly long, and his beard hung directly down to his chest.

He looked to be in his seventies, and he was in good spirits, and when he saw a room of people standing, he smiled and said, "There are so many guests." ”

Ma Bencai hurriedly introduced everyone to him one by one, but whether it was Luo Qi Nuanyue or Tian Zhiyu Wulihan, when introducing their identities, the divine doctor only smiled faintly, and his expression did not have any waves.

Ma Bencai was accustomed to his attitude, and said with a smile: "Divine doctor, I have collected all the medicinal materials you told me last time, and a large part of them have been collected by going to Beiyi, and you also know that Beiyi has been fighting with Dongyang recently, and it took a lot of effort to collect these things." ”

The divine doctor still smiled slightly, and said lightly: "Boss Ma, you have worked hard. These medicinal materials are not easy to find in Dongyang, so I came to you, knowing that you have a wide range of channels and many means. ”

"Where, it is the honor of Lao Ma to be able to make a little contribution to the divine doctor," Ma Bencai hurriedly said.

The divine doctor first went to look at the decoction that was boiling, and then rummaged back and forth in the bamboo basket filled with herbs next to it, as if looking for something, but in the end he took out nothing.

At this moment, two people walked in outside the door, in front of him was the boy who had just helped the man put the medicinal herbs, and behind him was another boy of the same age and height. The boy in front of him said to the divine doctor, "Master, the medicinal materials have been put away. ”

The divine doctor nodded and asked the boy behind him, "Jinglian, what is the result?"

The boy named Jinglian shook his head in frustration and said, "Master, it still doesn't work, and it has failed again." ”

The divine doctor seemed to have anticipated this result a long time ago, and was not very disappointed, but said to him with great relief: "It's okay, it's okay, keep doing it, and one day you will succeed." ”

The boy Jinglian nodded, saw so many people in the room, bowed his head and said nothing, walked to the pots and cans, and stood there quietly.

"What, Divine Doctor, are you doing any experiments?" asked Ma Bencai.

The divine doctor nodded and said, "Do a blood-related experiment?"

Ma Bencai actually didn't have much interest in the experiment, but he saw that Fuzhu ignored everyone, and the others didn't know what to say for a while, and the scene was very embarrassing, so he didn't have anything to say, and asked, "What kind of experiment is it?"

The divine doctor didn't want to elaborate, but he didn't want to lose Ma Bencai's face too much, so he had to say softly: "There is a person who suffers from a strange disease, and her husband has found me and asked me to cure him. Because he had been kind to me in the early years, the old man couldn't wipe his face and agreed to him. It's just that this disease is too strange, the old man went through all the ancient books, and only saw a precedent of a successful cure, and the doctor only said that he used the method of exchanging blood for the patient, as for how to exchange blood and whose blood to change, he did not mention a word, so the old man had to slowly ponder and find a way to do so. ”

After hearing this, Ma Bencai said with a big grin: "Isn't this easy? Since the husband loves his wife so much, he will use his husband's blood." ”

"Of course not," the divine doctor Fu Zhu and Tian Zhiyu said in unison.

After saying this, the whole room looked at Tian Zhiyu, and the divine doctor was a little surprised, and said, "Young man, how do you know that you can't?"

Tian Zhiyu regretted that he was quick to speak for a while, but now in this case, he couldn't stop talking, so he had to say: "There is a difference between the types of blood between people, and you can't transfuse blood casually, if two people have different blood types, they are forced to transfuse, and the final result is only one, the blood of the person who was transfused coagulated and died of pain." ”

The others were fine, and the divine doctor Fu Zhu looked at him like a monster before he spoke, "How do you know?"

"This," Tian Zhiyu was speechless for a while, and really couldn't think of a good explanation, so he had to say: "There is a doctor in our village who loves to ponder, and he once gave blood transfusions, but as a result, most of the people who were transfused died, and only a very small number survived. He later concluded that human blood is divided into several categories, and only people of the same blood type can be transfused into each other. ”

The old doctor couldn't help but sigh after hearing this: "The old man thought that he was the only one who had studied this, but he didn't expect that there were other people in this world who also had this hobby." Did he ever find out how many kinds of human blood there are?"

"Four kinds," Tian Zhiyu replied truthfully.

Now the old doctor completely believed, said: "This is true, the old man was a doctor when he was young, and he saw many pregnant women who had difficult childbirth and excessive bleeding when they gave birth, and the teacher tried to transfuse the patient, but the result was very little success, at that time the old man was determined to study this blood, and he studied it for a lifetime, and then slowly figured out that there are four types of blood in people." The old man thought it was his own originality, but he didn't expect that there were still masters in the world, and he also came to this conclusion. ”

After he said this, his expression suddenly felt a little lost.

After listening to the words of the divine doctor, Tian Zhiyu really believed that this person had superb medical skills. You must know that the study of blood was not finally clarified until modern times, and he only relied on the most primitive method to come to this conclusion, which is impossible without extraordinary medical skills.

"Then the experiment you did was to figure out all the types of blood?" Ma Bencai then asked.

The divine doctor nodded and said: "Since I agreed to that person, the old man has to do his best, but unfortunately, although there are only four types of blood, it is difficult to study it clearly, even if the old man has studied it all his life, there is no way." ”

At this time, Tian Zhiyu spoke: "Zhiyu takes the liberty of asking, how did you do the experiment, Divine Doctor? Maybe I can help you solve some problems." ”

The divine doctor looked at him, thinking that he also knew some knowledge of blood, so he said, "The old man will take you to have a look," and as he said that, he stood up and walked with Tian Zhiyu to his 'laboratory'.

When they came to his 'laboratory', Tian Zhiyu saw the equipment used by the divine doctor to do experiments, which were also some bottles and cans, and the objects of his experiments turned out to be dozens of rabbits.

Tian Zhiyu was a little stunned, and said, "Divine doctor, you are doing blood type experiments, do you use rabbits?"

Hearing him ask, the divine doctor was a little stunned and said, "Isn't it possible? Aren't the creatures under the heavens connected?"

Tian Zhiyu smiled a little dumbly, it seemed that he still overestimated the medical skills of this era, but he could think of this, which was already much ahead of the times.

"No, the divine doctor, let alone all the animals in the world, no different kinds of animals can transfuse blood with each other, let alone people and animals. ”

After hearing this, the divine doctor's face immediately became a little hesitant, and he was about to speak, but Ma Bencai, who was standing aside to observe the words, hurriedly said: "Zhiyu, the divine doctor's understanding of medical skills is far beyond yours, and you must not make a mistake in front of the divine doctor." ”

The divine doctor waved his hand to stop Ma Bencai from continuing to speak, but looked at Tian Zhiyu and said, "You go on." ”

Tian Zhiyu thought for a while, and then said: "I think you must have done a lot of experiments, is it that as long as the same kind of animals transfuse each other, no matter how high the mortality rate is, there are successful cases, but blood transfusions between different animals must all die?"

The divine doctor was a little frustrated when he heard this, and said: "I see, I see, the old man has been studying in the wrong direction all his life, no wonder he can't find any rules." ”

Tian Zhiyu continued: "Divine doctor, you don't have to be like this, in fact, there is a way to save it. ”

Hearing that there was a way to save it, the miracle doctor immediately lifted his spirit and hurriedly asked, "How to save it?"

Tian Zhiyu saw that everyone's eyes were looking at him, and said: "You can find more people, and then arbitrarily take the blood of different two people to fuse, and compare them one by one, if the two drops of blood can be perfectly fused, and no coagulation occurs in a short period of time, then there is a certain probability that the blood type of these two people is the same, if the blood of two people is coagulated soon after fusion, then the blood type of these two people must be different, and they must not be transfused to each other." ”

"What is the principle of this?" Ma Bencai asked the question for the divine doctor.

This question can not be explained to you clearly, Tian Zhiyu thought, he had to answer in the most perfunctory way: "This will not be explained clearly for a while, but the conclusion is definitely correct." ”

"Then if the blood of two people fuses and does not coagulate, then is the blood type of these two people the same?" Ma Bencai then asked.

Tian Zhiyu shook his head and said: "Not necessarily, there is a very magical phenomenon here, that is, there is a universal blood among the four blood types, he can give blood transfusions to anyone, but he can only accept blood transfusions from people of the same type of blood type as himself." ”

The divine doctor felt even more incredible, this conclusion was exactly the same as the experiment he had done before, and now he looked at Tian Zhiyu's gaze completely different, and said: "It's amazing, it's amazing, what you said explains the truth that the old man can't understand for many years." A long time ago, the old man found out that it was okay for a person to give a blood transfusion to another person, but on the contrary, the person died, and the old man thought it was other reasons at that time, but he didn't expect the secret to be hidden in it. Is there anything else that needs to be explained?"

Tian Zhiyu didn't know how to explain such a troublesome thing as ABO blood type, so he simply said the conclusion: "The four blood types, if you replace them with one, two, three and four, four represents the universal blood type, and you can give one, two, and three blood transfusions, but you can only accept four blood transfusions for yourself." Three is also a magical blood type, he can give blood transfusions to one and two, but one and two cannot give blood transfusions to three, and three can only accept the blood of himself and four. One and two, on the other hand, can accept three and four, and they can also accept blood of their own blood type, but they cannot give blood transfusions other than their own blood type. ”

For a moment there was absolute silence in the house, except for the sound of the still alive rabbits grazing.

"The old man finally figured out that this is the truth, everything is explained," the divine doctor had irrepressible excitement on his face, took Tian Zhiyu's hand and said: "Little boy Zhiyu, please accept the old man's bow," and after speaking, he was about to salute Tian Zhiyu.

How could Tian Zhiyu accept his big gift, and hurriedly supported him and didn't let him bend down, but the divine doctor insisted on saluting and bowed deeply to Tian Zhiyu.

And Ma Bencai and the others looked at Tian Zhiyu, just like they knew him on the first day, they thought they knew him very well, but he always inadvertently showed his more mysterious side.

God knows how he could understand the medical principles that the divine doctor Fu Zhu didn't understand?

After figuring out this matter, the divine doctor was obviously a lot more relaxed, and for a moment Tian Zhiyu thought that he was several years younger.

"Jing Lian, hurry up and make tea for a few distinguished guests, ask for the best tea, go quickly," the divine doctor instructed his little apprentice.

The divine doctor turned around and took Tian Zhiyu's hand and said, "Let's go, let's go to that house, the old man still has something to ask you for." ”