"Tian'er's words are reasonable. It seems that it is easy to attack a country, but it is difficult to govern a country. Anyone who fails to consider it properly may have irreparable consequences."

Li Shimin said in a deep voice.

After hearing this, Xu Tian couldn't help but roll his eyes to Li Shimin and thought to himself, "What are you pretending to be? It's easy to attack a country, but it's difficult to govern a country."

Now the emperor of the Tang Dynasty is Li Shimin. How about you calling someone?

"Father-in-law, there is nothing difficult in the world. I am afraid that those who are interested can govern a country as long as we truly consider the problem from the perspective of the people."

Xu Tian said in a deep voice.

"Yeah! After my father returns, I will send you feces. You can concentrate on making farm fertilizer. At that time, my father will help you sell farm fertilizer."

Li Shimin said.

"Father-in-law, those feces are extremely smelly. If they are transported back and forth on the road, let alone the smell. Feces are dirty things. Now it's hot and easy to spread diseases!"

"So, it is better for the son-in-law to buy land near major cities and build a farm fertilizer production plant."

Xu Tian said in a deep voice.

"kindness?

Tian'er, you mean, feces can spread diseases?"

Li Shimin looked at Xu Tian in confusion and asked.

The feces are dirty and smell bad, but I have never heard of feces that can spread diseases. Otherwise, if so much feces would have been sent out in the palace every day, wouldn’t the eunuchs have been sick long ago?

When Xu Tian heard his father-in-law ask this, he realized that the ancients only knew that contacting patients would spread diseases, but they did not know what the spread and source of the disease was.

He said in a deep voice: "Father-in-law, if you come into contact with the patient, it is very likely that you will sigh at the disease caused by the patient. You should know this, right?"

"Of course I know this as a father."

Li Shimin said.

"Okay! Since my father-in-law knows this, the rest will be explained easily. If you come into contact with the patient, you will get sick. So, will you also get when you come into contact with items that the patient has used?"

Xu Tian asked.

this……

Li Shimin was silent for a moment and said, "It should be, too."

To be honest, he really never thought about these problems, and the imperial physicians in the palace never thought about such problems.

Xu Tian said again: "It seems that my father-in-law still understands the truth. Yes, when exposed to items used by patients, he may also have a chance to spread the disease!"

"So, do patients also need to eat, drink, defecate and urinate?

How do they deal with their feces?”

kindness!

Li Shimin was stunned immediately, this!

It turns out that the root of the problem is here!

He looked at Xu Tian in shock and asked, "Tian'er, your proposal is very good. In the future, everything about the patients must be separated from ordinary people!"

Xu Tian smiled slightly. It seemed that his father-in-law understood the truth, but this was only part of it, and he had to explain it to him.

"Father-in-law, there is no need. First of all, it is too troublesome to do this. Secondly, it is not realistic to do this. Even if the lord today gives orders, no one will do it completely according to this!"

"Besides, if you do this, you will not solve the root cause of the problem! After all, although symptoms such as wind and cold may cause death, they will not spread on a large scale. It is truly lethal and can threaten the country's foundation. It is a plague!"

"You haven't thought that plagues have erupted in all dynasties. Why is this?

And what is the cause of the plague?”

Xu Tian said again.

The question he raised was probably thought of by kings of all dynasties, and doctors have been thinking about it all the time, but they have never found the root cause.

hiss!

When Li Shimin, Li Ji, Changsun Wuji, and Cheng Yaojin heard Xu Tian raise this question, they were so shocked that they couldn't speak. They all opened their eyes wide and looked at Xu Tian.

“Why?

What is the reason?”

The four of them asked in unison.

"It's very simple, it's hygiene!"

Xu Tiandao.

"health?"

The four people were confused.

"Hygiene means cleanliness or uncleans. For example, if a person likes cleanliness, it is hygiene. If he doesn't like cleanliness, it is hygiene."

Xu Tian explained.

"So that's it. It seems that Lao Cheng is not a hygienic person!"

Changsun Wuji said directly.

Cheng Yaojin urged his beard to stare at Changsun Wuji and said, "Who said that I, Cheng, is not hygienic anymore?

My old Cheng washes his hands every day!”

"Haha! Lao Cheng said it very well. Wash your hands before meals, rinse your mouth after meals, and wash your hands after entering the toilet. No matter what you eat, you must wash it before eating!"

"Especially when drinking water, you must drink clean water. If you cannot guarantee whether the water source is clean and you need to drink water urgently, you must boil the water before drinking."

Xu Tian said with a smile.

"Look! My son-in-law understands this, so he said that I, Lao Cheng, pays great attention to hygiene!"

Cheng Yaojin said proudly.

Li Shimin gave Cheng Yaojin a blank look, looked at Xu Tian and asked, "Tian'er, according to your opinion, is it caused by the plague that is not hygienic?"

"Of course this is the case. Didn't my father-in-law discover that the plague often broke out after war or famine?"

Xu Tiandao.

kindness!

Li Shimin was stunned. When he thought about it carefully, it was true. The plague mostly broke out after large-scale wars or large-scale famines. Is there any connection between this?

"Tian'er, these are all recorded in history. They are not secrets. Could it be that you know the reason?"

Li Shimin asked.

"Of course I know, what is the most after the war?

Of course, there are the most corpses, and it would be fine if these corpses could be buried as early as possible. If they were left there for a long time, they would rot and spread the plague!"

"There are also large-scale famines. Famines will surely die. If people die, the bodies cannot be buried in time, and they will also rot and spread plague."

Xu Tian explained.

"It's actually the reason. So, if the body is buried in time, there will be nothing wrong?"

Li Shimin asked.

"We can't say that nothing is wrong, we can only say that this kind of thing can greatly reduce the occurrence of such things. After all, a large number of corpses are piled up together, even if they are buried underground, the poisonous gas and miasma formed by the decay of the corpses in a short period of time will still spread the plague!"

"If someone enters this area at this time, the plague will be brought out. Moreover, if people who come into contact with these corpses cannot take a bath and throw away their old clothes, it may also spread the plague."

"What I just said is that although there is a risk of spreading the plague, if everyone pays attention to hygiene, it can greatly reduce the speed and range of spreading the plague!"

"Of course, if a city is treated in disorder and the sanitation conditions are poor, the people in the city will often get infected with diseases. Over time, the patients will accumulate and a small-scale plague will also break out."

Xu Tian explained.
Chapter completed!