After eating, Zhang Tingyun said hello to Qiao Mu and the others, and then went back to the house again.

Compared with talking and chatting with his family, and even receiving nagging from his parents and grandmother, it is obvious that he has just gotten it, and the system that he doesn't know very well is more important to Zhang Tingyun, and he is more curious.

After going back to the house and locking the door again.

Zhang Tingyun turned on the system again.

He began to carefully read every small step and word, and carefully read all the introductions to the methods of making medicines that his current merit value could be exchanged.

Then those who have difficulty choosing a choice begin to consider which drug to redeem and how to make it.

Although his first thought was to exchange for hair growth potion, because his hair had already begun to be a little bald, and even many of his classmates in the same major, to be precise, nearly a third of his classmates were already a little bald, or about to go bald.

Studying medicine is too stressful.

Some baldness is also normal.

However, he was a little worried that the hair growth potion would not be able to help him gain enough merit points.

Because although it is very important to look at whether there is hair or not, it is not related to life and death, and Zhang Tingyun knows very well that the amount of merit he has now is only enough to exchange for the production method of a potion.

If the Hair Growth Elixir didn't bring him new merit, then the method of making the second Elixir that he wanted to exchange for would be a distant thing, something he didn't want to see.

Although as long as he completely controls the hair growth potion and applies for a patent, a simple hair growth agent is enough for him to live a comfortable and rich life, but this is not what he wants.

Under the influence of his father, although he is not as enthusiastic about healing and saving people as his father, he does hope that he can do better and help more patients.

Therefore, at this time, of course, he still hopes to exchange more methods from this system for the preparation of healing potions that can cure serious diseases.

In order to achieve this idea, Zhang Tingyun hesitated for a long time, and finally gave up the exchange for hair growth elixir, and instead chose a hemostatic spray, which is a special hemostatic spray that is many times better than the white medicine spray.

It can stop bleeding in almost three seconds.

Of course, this is for small and medium-sized wounds with a length of less than ten centimeters and a depth of less than one centimeter, if it is more serious, such as those wounds with a depth of more than three or four centimeters, or even those wounds that are cut into blood vessels, the speed should be slower, but it can basically stop bleeding within ten seconds, and if it is combined with some auxiliary hemostatic means, or hemostat gauze and the like, the effect will be better.

Generally speaking, the effect of this hemostatic spray is better than the effect of all the hemostatic sprays in the whole world at present, and the effect is many times better than the special hemostatic spray for the army.

The reason why Zhang Tingyun chose to exchange for such an inconspicuous spray is mainly because of the current medicine production methods that he can exchange, only this one can save people's lives, others such as one can cure a cold, a spoonful of potion can suppress cough, remove mites from the whole body, treat fox odor and other medicines, that is not very important at all, whether there is or not is not fatal, Zhang Tingyun is a little worried that merit may need to save people's lives to get, so he naturally has to carefully choose the hemostatic spray to exchange.

What else should I do? Could it be that you can still save other people's lives with the medicine that cures fox odor?

"Alas, I can only try, but unfortunately I don't have much merit on me, and I can't exchange those high-tech potion production methods at all, otherwise I can cure most of the leukemia and get a lot of merit by casually exchanging a bone marrow regeneration potion."

Looking at the method of making hemostatic spray that had appeared in his mind, Zhang Tingyun still sighed a little dissatisfied, a little annoyed that he had too little merit on his body, and he couldn't exchange it for real good things, so he could only exchange it for a hemostatic spray that he didn't know if he could earn merit.

But at this time, he had to choose this way.

Therefore, in the next second, Zhang Tingyun began to sit quietly on the bed, his eyes slightly closed and carefully looked at the knowledge transmitted by the system in his mind, that is, the production method and corresponding principle of hemostatic spray, and waited for him to read it for nearly half a day, read the content in general, and understood the specific process and basic principles, then reopened his eyes, and said to himself with emotion:

"I didn't expect it to be a potion.

It's a series of potions.

It's really profitable. ”

After an afternoon of watching, Zhang Tingyun realized that the method of making hemostatic spray he exchanged from the system was not a simple method of making hemostatic spray, but more than a dozen methods were counted in the column of hemostatic spray.

The classification in the hemostatic spray data shows that there are hemostatic sprays specially used for epidermal texture hemostasis, there are also hemostatic sprays used for vascular hemostasis, and there are even hemostatic sprays used for visceral hemostasis and other aspects of hemostasis.

Generally speaking, although the hemostatic spray is relatively versatile, but for different parts and organs, the internal formula still needs to be appropriately adjusted, and there are special pharmaceutical production methods for some special situations, such as arterial hemorrhage, etc., in the face of this very critical situation, there is also a special hemostatic spray production method in the data, which can temporarily and compulsorily block blood loss.

But the duration was only half an hour.

And there are some mild side effects.

For example, it comes with some paralyzing effects.

Therefore, it is necessary to hurry up and complete the corresponding repair within half an hour to avoid heavy bleeding again, although it does not sound very serious, but half an hour is enough time for the doctor to arrive and save his life.

This is undoubtedly the most important kind of hemostatic spray, because only this hemostatic spray can really save people's lives, and other hemostatic sprays that can only stop bleeding on small wounds, even if they don't, they don't actually affect lives much.

Generally speaking, as long as you don't look for death.

None of those types of wounds are fatal.

In the evening of the same day, Zhang Tingyun, who had already learned the specific steps of making hemostatic spray, directly passed his mother to call him for dinner, hurriedly ran out to take a taxi to find an acquaintance to buy some corresponding equipment and medicines, and then went to his own Chinese medicine hall, took a lot of Chinese medicine, and used the equipment in the store to extract and separate the active ingredients of those Chinese medicines, and then took those things home and prepared to do experiments overnight.

Then see how the hemostatic spray works.

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