The second book to be purchased in Ningbei is Law and Society.

Although the blatant propaganda of "Law and Society" was an attack on the feudal society at that time, because the law is greater than power, and the power of law is greater than everything.

Under the law, everyone is equal.

Nor does the law allow one person or group of people to be above the law.

Although in ancient times, there was an allusion that the prince broke the law and committed the same crime as the common people, but if it is really practiced, it is really too difficult!

Unless it is a last resort, which emperor is willing to give his son to death himself?

Therefore, the law contradicts the power of the royal family in feudal society.

But if Ning Bei dared to propagate "Law and Society" in ancient times, he would have to be connected to the Nine Clans the next day!

However, Ning Bei did not intend to promote the law, and he did not dare to ......

He just wanted to learn about the legal system and then make a few regulations suitable for businessmen.

After all, after he traveled to the Tang Dynasty, using the knowledge stored in his mind, he would definitely set off an unprecedented storm in the Tang Dynasty.

Although Ningbei decided to be a businessman with '100 million' talents, he was involved in more than just business.

Shinong industry and commerce, all occupations will be turned upside down because of Ningbei!

As long as no one stops him, then everything will be renovated.

When it comes to the immense amount of wealth, no one can resist the temptation!

Therefore, at this time, if there is no order constraint, the entire Tang Dynasty will be involved in this chaos!

When the time comes, those who have money will get richer and richer, and those who don't have money will find it difficult to support themselves.

This is a precursor to the outbreak of the financial crisis!

Why did the financial crisis erupt? Is it just because there is no money?

No, it's because there is too much disparity between the rich and the poor, and money is not as valuable as it used to be.

This is not what Ningbei wants to see.

That's why he was ready to study the law and make rules to bind everyone.

With systems and constraints, people will behave in a proper manner, and financial crises will not occur.

This kind of thing is still allowed by the feudal system.

The country has its own laws, and the family has its own rules!

After all, even a rich man would set rules for his family to restrain his slaves.

There is also "Basic Organic Chemistry", which is also a necessary choice!

After this period of learning knowledge, Ningbei suddenly understood what it means to learn mathematics, physics and chemistry well, and he is not afraid to go all over the world.

Mathematics, physics and chemistry are the foundation of all science!

The items he needed to make when he traveled to the Tang Dynasty were more or less related to chemistry.

Most of the techniques are also used in chemistry.

Therefore, chemistry must also be learned well, and it must be mastered!

In addition, Ningbei also purchased some textbooks that could be learned at university.

For example, a series of textbooks such as economics, finance, agriculture, physics, chemistry, etc.

Although finance seems to be out of step with ancient times, it is not.

Finance is very important at all times!

There were no banknotes in the Tang Dynasty, and if Ningbei wanted to make banknotes and silver bills, then finance must be studied!

He is not the only one who has to learn, but he also has to teach those students who have good understanding.

He can't manage that much money by himself.

Professional people do professional things, and these things are taught to students who study well.

And you can hone their experience, and you can even give them no money!

It's perfect!

After I had selected all the things I had purchased, I sent in the items I bought from the wholesale market.

Looking at the raw materials in one place, Ning Bei only felt extremely relieved.

These are all the capitals that he used to settle down after he traveled to the Tang Dynasty!

In other words, all these raw materials in front of you are white flowers!

How could he not feel at ease when he looked at the silver!

Ning Bei even set a small goal, and after he earned enough gold and silver, just like Xing Ye acted in "Jiupin Sesame Official", he directly used the silver to build a house and make a bed, and then slept beautifully in it

It's going to be a great experience!

But Xing Ye is acting, and he is real!

Seeing that it was only five o'clock in the afternoon, it was still early, and Ning Bei also planned to do a small experiment.

Looking at the dozens of raw materials in front of him, Ning Bei finally chose to make ......

Toothpaste.

The reason is very simple, it really hurts to have tooth decay!

A toothache is not a disease, it hurts to kill!

Even if ten years have passed, as long as he thinks of the time when he had tooth decay, Ning Bei feels that his teeth are still faintly painful.

It hurts, it hurts!

And it is not difficult to make toothpaste, Ningbei plans to make two kinds of toothpaste, one is more similar to modern, and the other is more ancient.

In this way, after he traveled to the Tang Dynasty, if he couldn't make a more modern toothpaste, he could also make a usable toothpaste from local materials.

Although the effect is a little worse, it is also the existence of crushing the Tang Dynasty!

Modern toothpaste is made from a mixture of friction agents, humectants, surfactants, thickeners, sweeteners, active additives, and other substances.

But because there were too many restrictions in the Tang Dynasty, Ningbei planned to make a simplified version of toothpaste.

All you need is friction, humectant, flavor and saccharin.

What do you want to do with all the bells and whistles? As long as it works!

If you want to enjoy it, it's not too late to slowly delve into a complete toothpaste when you make money in the future.

Thinking back to the steps in his mind about making toothpaste, Ning Bei took out a little quicklime from the convenience bag on the side.

Quicklime is a good thing, whether it is used as a building material or as a desiccant or insecticide, it has a significant effect.

And making quicklime is also very simple, you only need to bake a specific rock, then crush it, grind it into a powder, and the result is quicklime.

To make toothpaste, lime is also inseparable, because Ningbei uses lime to decompose calcium carbonate.

Calcium carbonate is a component of friction agent, and the original toothpaste is composed of calcium carbonate, which can play a certain role in protecting and cleaning teeth.

Put the quicklime in a beaker, put a certain amount of water, and burn it with an alcohol lamp.

Under the action of high temperature, quicklime will turn into mature lime.

And if you want to convert hydrated lime into calcium carbonate, then you need to be patient for a while.

There is carbon dioxide in the air, and hydrated lime and carbon dioxide are replaced, and the resulting product is calcium carbonate.

Whereas, the ingredient of the humectant is glycerin, which is a transparent viscous liquid that is raised from animal and vegetable oils.

The purpose of adding humectants is to prevent calcium carbonate from coagulating, otherwise the calcium carbonate will solidify into a ball or become a powder again, and the effect of use will be greatly reduced.

However, Ningbei does not need to deliberately extract glycerin from animal and vegetable oils, only needs to use animal and plant oils.

Otherwise, just extracting glycerin will have to waste Ningbei's time today.

Anyway, the function of the moisturizer is to make the toothpaste always present a viscous fluid state, and it is enough to use animal and vegetable oils.

As for flavors and saccharin, these things were found in ancient times, and although they were very coarse, they were enough if they were only used as toothpaste.

As long as there is something, he doesn't have to make it himself.

The first thing he had to do when he first crossed over to the Tang Dynasty was to establish a firm foothold first.

For the rest, it will not be too late to do it when you have money and manpower in the future.

Therefore, after Ningbei crossed over to the Tang Dynasty, the work around the early stage must first ensure that the things produced can be used.

After you make money later, you can make high-quality products and make the business bigger and stronger!

Soon, the quicklime in the beaker turned into calcium carbonate.

After simple impurities, Ningbei put calcium carbonate, animal oil, flavor, and saccharin in a large beaker, and then dissolved it in purified water until it was even.

After stirring for a while, Ning Bei felt that this beaker was a little too big, plus there was only one alcohol lamp, and the preheating was uneven.

He simply started another pot, put this pot of hodgepodge in it, and stirred it slowly.

It looks much more comfortable that way.