Sometimes the rise and fall of a dynasty is even related to a pandemic of infectious diseases.

In Li Yuanjia's memory, a history professor at Jiaotong University once said that infectious diseases can kill a country, such as Rome from malaria, Egypt from schistosomiasis, and China with two dynasties, the Jin and Ming dynasties, died of plague......

Li Yuanjia is actually skeptical of this kind of argument.

However, one thing he can be sure of is that the 5,000-year history of China must be full of bones that died of infectious diseases, and if this number is added up, I am afraid it will be......

100 million!

Because in the future, when people were struggling with who was the first cause of death due to cardiovascular disease and malignant tumors, before the second half of the twentieth century, Chinese...... Of course, it is the same in any country before the success of the Industrial Revolution, the top causes of death have always been infectious diseases and malnutrition, as for cardiovascular and cerebrovascular diseases, as well as cancer, diabetes and the like, except for high-ranking officials and nobles, how can ordinary people be qualified to have these diseases?

Therefore, if there is a book of "Infectious Diseases", it can tell people some basic knowledge, such as mosquitoes are the culprits of miasma, such as protecting wells can live countless people, and for example, when a pandemic occurs, you must wear a mask and wash your hands every day...... So how many lives can be saved in the next thousand years?

Li Yuanjia couldn't guess this number.

The only thing he knows is that in the future, when he has the ability, he will take out this book and make him one of the countless "Treatises on the Origin and Syndrome of Diseases" in Chinese history!

As for the present......

If you can't save your life, everything is your nonsense!

Until he returned home, Li Yuanjia was still a little depressed because of this incident, his face was gloomy, and he was so frightened that the neck of the spring cigarette who came forward to serve him to wash his hands shrank, and he didn't dare to take a breath.

Seeing her like this, Li Yuanjia became more and more bored.

And just when he frowned, and was about to send the two careful maids away and be quiet, the housekeeper Han Shan walked in with a happy face and said respectfully: "King, several workshops outside the city have been built, and in three or five days, the craftsmen will be able to settle in." ”

"Oh? So fast? ”

After listening to Han Shan's words, Li Yuanjia was stunned for a moment.

"What the king ordered, everyone naturally didn't dare to slack off."

Seeing that Li Yuanjia seemed to be a little suspicious, Han Shan hurriedly explained: "And the construction is relatively small now, just to give them a place to use temporarily." We have already chosen a place for the real paper workshop, but we will not have to wait until next year to build it. ”

"Oh, I see."

Listening to Han Shan's explanation, Li Yuanjia naturally understood.

He really planned to make papermaking an industry in the future of Han Wangfu and insist on doing it. Especially after Wang Pu and the others mastered more powerful techniques than the Li family's paper mill, Li Yuanjia couldn't think of a reason for him to give up on them - although the prince's business words were not very good these days, but if it was a blank paper business, he believed that both the emperor and others should be a little more tolerant, right?

After all, it's an elegant thing!

Therefore, building a paper workshop with a large scale and advanced facilities has become something that Li Yuanjia must start doing now......

When he thought of the paper workshop, his heart hurt so much!

If possible, in the future, after the white paper of Han Wangfu became famous, Li Yuanjia also planned to promote the willow charcoal he "invented", and when the movable type printing technology matured, he even wanted to promote the alloy of ink and movable type, so the new papermaking workshop in Luzhou was quite amazing.

As a result, it's all cheap Li Lingkui's kid now!

"Alas......"

He sighed secretly in his heart, and just when he was about to say something, a thought suddenly flashed through Li Yuanjia's mind: "Han Shan, do you know if there are any craftsmen in Chang'an City who can make glass?" ”

"Ruri? This ......"

After hesitating for a moment, Han Shan shook his head and said, "King, the glass is precious, and I have only seen a few pieces...... The king inquired about the glass craftsman, but he wanted to make his own glass? ”

As Li Yuanjia's big butler, Han Shan guessed his thoughts almost immediately.

In addition to lamenting in my heart, I was also helpless.

There's no way, who let their own king do this? A few simple workshops outside the city have just been built, and Han Shan is here to give Li Yuanjia a good news, and by the way, to make up for the points lost by not accompanying the king in the past few months, but he didn't expect to hear his new "idea" all of a sudden!

"Well, there's an idea."

There was nothing to hide in front of Han Shan, and Li Yuanjia immediately nodded.

Talking about the pandemic in the court today, he suddenly realized that he could actually start preparing something. So what is so important to the "future of medicine" that he can start preparing for now?

The first thing that comes to mind is glass!

Needless to say, test tubes, beakers and so on, not only for medical needs, but also for the birth of chemistry, I believe that the birth of chemistry is inseparable from them; There is also an epoch-making inspection instrument, a thermometer, which must have a material that can encapsulate mercury......

But for Li Yuanjia, the first thing that comes to mind is the microscope!

Without the birth of bacteriology, mankind would never have been able to truly understand infectious diseases; Without the microscope, there would be no birth of bacteriology; And without glass, Li Yuanjia can think about the microscope, and he will never be able to make a real thing!

Therefore, it is natural for Han Shan to find a few glass craftsmen.

It's just that seeing Li Yuanjia's confirmation, Han Shan's face immediately showed embarrassment: "King, although the Central Plains has also had colored glass since ancient times, it is far inferior to the Western Regions in terms of exquisite and meticulous, and now the best colored glass in the Tang Dynasty is almost all foreign!" Moreover, the countries of the Western Regions are very protective of the method of making glass......"

How can this thing be so easy to make?

Although he has never seen glass a few times, but to be able to become Li Yuanjia's housekeeper, Han Shan's knowledge and experience are not lacking, and he naturally knows how precious glass is in the Central Plains! If it is a few decades in the morning, those things are enough to become a basis for the princes and nobles to fight for wealth, that is, the beginning of the Tang Dynasty, no one dares to do this for the time being.

So for the king's idea, Han Shan is not optimistic.

"yes, I know."

Li Yuanjia didn't care about Han Shan's senseless worries, he just waved his hand and said: "You just have to find someone who can make glass, whether it is a Tang Dynasty or a Western Regions, hire a lot of money!" It doesn't matter if I can't find it, I'll have my own way then. ”

Glass, glass, one word difference, but two completely different things.

In fact, most of the ancient Chinese glaze was colored, and most of the high transparency came from Persia, while for Li Yuanjia, opaque glass was meaningless.

But there is no technology, just start from scratch.

Li Yuanjia knows that the raw material of glass is quartz sand, and if you add something like plant ash, you can make it when it is melted? Anyway, as long as you are willing to spend money and time, there is no reason why the Romans can start to use glass to make windows in the fourth century, and we Tang people can't do it, right?

Find some craftsmen and try the same material and the same material......