In the past year, Emperor Li Yuan's body has obviously weakened a lot.

Li Zhi prescribed him medicine several times, but there was no improvement.

So he decided to come to the medical school to supplement his knowledge, so that he might be able to come up with a new solution.

He knew that the relationship between his father and grandfather had just been restored, and now was the time for his father to do everything he could to make up for his shortcomings.

Therefore, he will do his best to prolong the life of his grandfather.

Just when Li Zhi was fascinated by reading the book, Sun Simiao's laughter suddenly came from outside the door.

Immediately afterwards, the door curtain was opened by Liu An, and Sun Simiao's voice also came in.

Sun Simiao said: "How could His Royal Highness the King of Jin be so idle today? Can you come here to read a medical book? ”

Li Zhi said with a smile while getting up and saluting: "Xiao Wang said that he misses the old divine doctor, I don't know if the divine doctor can dare to believe it?" ”

Sun Simiao shook his head and said: "The old man will not fall for His Highness, His Highness is still good at telling the truth." ”

Li Zhi said with a smile: "This king really missed the old divine doctor and came here. ”

Sun Simiao smiled and said: "Since this is the case, then Your Highness will take out the gift and hand it over to the old man!" ”

When Li Zhi heard this, he immediately scratched his scalp in embarrassment.

He smiled and said, "Xiao Wang came in a hurry and forgot to buy a gift." ”

Sun Simiao smiled and looked at Li Zhi no longer speaking, but the light in his eyes was full of urgency.

When Li Zhi saw this, he had no choice but to speak helplessly: "Okay! This king is here to make up for the lessons he has owed. ”

After hearing this, Sun Simiao quipped: "The old man guessed that His Highness must have nothing to do but go to the Three Treasures Palace. ”

Li Zhi smiled awkwardly at first, and then asked, "I wonder what new discoveries the divine doctor has made recently?" ”

Sun Simiao stroked his beard and said with a smile: "The prescription has been adjusted a little, and the extraction of the medicine has also made some achievements." ”

After Li Zhi heard this, he asked Sun Simiao in detail what drugs had been extracted.

Drug extraction is the method suggested by Li Zhi to Sun Simiao.

At that time, it was mainly to be able to extract artemisinin and ephedrine.

One of these two drugs is used to treat malaria and the other is used to treat cough and asthma.

Li Zhi was able to get in touch with the extraction methods of these two drugs thanks to the biology teacher in his previous life.

It was he who led the students to do these experiments in the classroom that gave Li Zhi the opportunity to master the method.

However, Sun Simiao's achievements under the leadership of those doctors are far more than these two.

They also extracted something from other plants such as mandala, coptis chinensis, etc.

The uses of these things are still being studied by these physicians.

And Li Zhi is not very familiar with these, so he can't give any useful advice.

But now that he's here, he can't do nothing.

So he mentioned that he could try to study the blood.

He really studied this when he was in high school.

Also thanks to his biology teacher.

So Li Zhi told Sun Simiao how to make serum and how to determine whether blood and serum coagulate.

After saying this, Li Zhi simply put forward the principle that the same type of blood can be transported to each other.

In this way, when encountering some wounded who have lost too much blood on the battlefield in the future, they can save their lives through timely blood transfusions.

There are not many people who die directly in war in this era.

Most of them are caused by infection and excessive blood loss after the injury.

For example, before Li Zhi proposed the method of surgical sutures, once the soldiers received serious knife wounds, the arrow wounds could only be dressed with some hemostatic drugs for simple bandaging.

Huge wounds are neither sterilized nor sutured, and if they become infected, they are essentially certain to die.

Previous sterilization and suturing techniques have been able to reduce some deaths.

In the future, if there is a blood transfusion technology, then the death rate of the Datang soldiers will definitely be able to drop to an extremely low level.

The strength of the Tang army was already strong.

If the number of deaths had been lower, the warriors would have been more desperate in their killings.

After thinking of blood transfusion, Li Zhi's thinking suddenly diverged.

He was going back to his house to give Li Su some homework.

Let him take someone to make some saline and glucose.

It is also necessary to have the glass workshop produce some water bottles containing these solutions.

Then he had to go to Yan Lide and ask him to find a suitable animal intestine to make an infusion tube.

With the amount of knowledge he has now, that's all he can do.

For other things, Li Zhi can only hope that the people in the medical school will figure it out for themselves.

Anyway, he wrote physics books and chemistry books here.

As long as these people have an interest in research, they will always look at it.

After Li Zhi left the medical school in a hurry, he immediately explained these things.

Li Zhi had just finished his medical work when he was approached by the teachers he had hired for the children in the settlement.

The teachers didn't come to Li Zhi for anything else, but because they didn't like to teach the lessons that Li Zhi had written.

As for the reason, it is actually very simple, it is nothing more than that these teachers do not look down on the knowledge of mathematics, physics and chemistry from their hearts.

This can make Li Zhi embarrassed.

The courses he wrote were all from easy to difficult.

But if there is no teacher to teach them, the children will definitely not be able to learn on their own.

It's just that Li Zhi can't force these teachers yet, otherwise they will definitely drag a group of literati around to sue him.

Just when Li Zhi felt anxious, Yuan Tiangang happened to return to the palace at this time.

As soon as he entered the door, he happily said to Li Zhi: "Your Highness, Your Excellency is fortunate to have not dishonored your life, and has already cooperated with Lord Li to complete the transformation of the armillary sphere. ”

After listening to his words, Li Zhi also asked happily, "It was actually done so quickly?" Have you done this? The result? ”

Yuan Tiangang said: "Your Highness, this armillary sphere has increased the observation of the ecliptic, and you can observe the sun, moon and stars from above, and the hour scale from below, which is a great improvement compared to the previous dynasty." ”

After hearing this, Li Zhi said happily: "This is very good, but have you ever told your father?" ”

Yuan Tiangang said: "Right now, Lord Li may have seen the emperor. ”

Li Zhi arched his hand and said, "In this way, Master Yuan can wait for his father's reward with peace of mind." ”

Yuan Tiangang said humbly: "The subordinates really don't contribute much, and this matter can be made possible thanks to the presiding over of Lord Li." ”

Li Zhi waved his hand and said: "How the credit is distributed is all up to the father, and Master Yuan does not need to be humble." ”

After saying this, he opened his mouth and said to Yuan Tiangang: "Master Yuan is quite proficient in arithmetic, but would you like to teach some students for this king?" ”

Yuan Tiangang's return was just too timely, and there would certainly be no problem teaching those children with his attainments in mathematics.

Yuan Tiangang bowed down and replied, "Everything is up to His Highness's orders." ”