I, the queen and the father, start with a deer as a horse

Looking at the well-dressed young man in front of him, the strong man was a little dazed, thinking in his heart: Could it be that he has met a madman?
at this time.

Seeing that the strong man was silent, Li Si raised his voice and said, "Just show me your cattle, and I'll give you 500 taels!"

After finishing speaking, he looked at the shadow guard beside him, and said hurriedly, "Take out 500 taels."

"."

At this moment, let alone a strong man, even the shadow guard felt a little speechless.

It's just two cows. As for being so excited?

If they hadn't been following Li Si and seeing his actions, they would have thought him a lunatic.

Although they thought so in their hearts, they still took out the silver from their arms and waved it in front of the strong man after hearing Li Si's order.

"Can you really come up with 500 taels?"

The brawny man was slightly startled, and thought, unexpectedly, he also ran into a rich and insane man.

After thinking for a few seconds, he nodded and said, "I can show you, but only you."

Seeing that he agreed, Li Si showed excitement on his face, and was about to nod when he suddenly heard the voice of the shadow guard behind him.

"No, at least one person must follow."

Hearing this, Li Si glared at the shadow guard with an even more anxious expression.

What if you offend someone and they won't let you see it?
The strong man glanced at the shadow guard, and felt that he alone should not be a threat, so he nodded and said, "Okay."

then.

Li Si and a shadow guard followed the strong man into the mansion.

After walking a few steps, I saw a straw shed in the yard. Inside the grass shed were two cows lying quietly on the ground, looking listless.

"I don't know what's going on. These two cows have been like this for more than half a month. They seem to be infected, and I don't know what the disease is."

The strong man looked at the two cows, sighed, and said so.

Li Si didn't answer, but walked up to the two cows, looked at a certain place of the cows, and began to observe carefully.

"."

Seeing this scene, the strong man was completely dumbfounded.

Sure enough, he was insane, what's the point of staring at the place where the cows feed their cubs?

Not to mention the strong man, the shadow guard also showed a helpless expression when he saw this scene.

For the first time in so many years, he felt that performing a mission was so embarrassing.

He wanted to stop Li Si and tell him not to look at it.

The words were stuck in my throat, and I couldn't spit them out.

Seeing that Li Si looked more and more vigorously, he finally gave up struggling.

Forget it, let him go.

After leaving the country of Yan, no one knew what he had done.

Thinking of this, he suddenly heard Li Si's voice that was so excited that he couldn't control himself!
"Found it! Found it! Finally found it!"

Li Si almost jumped up and came to the shadow guard in a few steps, grabbed his hand, and said in a trembling voice: "We found it!"

The shadow guard wanted to struggle subconsciously, but when he saw Li Sitong's red and tearful eyes, he was startled and let him drag him.

When the strong man at the side saw this scene, he was almost certain that the person in front of him was out of his mind!
"500 taels of silver, buy your two cows, will you sell them or not?"

After a while, Li Si calmed down a little, looked at the strong man beside him, and asked.

Hearing this, the strong man fell silent.

Just when Li Si thought he was going to refuse.

The strong man suddenly said: "These two cows have been with me since I was a child, and I take them with me wherever I go. Normally, I don't even want to let them plow the land."

Li Si was slightly taken aback by his expressive voice.

He thought for a few seconds and asked, "So you don't sell it?"

The strong man shook his head and said, "No! You have to pay more!"

"."

Li Si was silent for a few seconds, and said, "800 taels!"

"make a deal!"

In the country of Yan, a young and strong cow can generally only be sold for three or forty taels.

The price of breeding cattle is even higher, but no matter what, it will not be higher than 100 taels.

Therefore, the two cows can be bought for 200 taels at most.

800 taels of silver is considered a sky-high price.

Seeing that the strong man agreed, Li Si looked at the shadow guard and ordered, "Bring out 300 taels and give it to him."

"Yes!"

Regarding the matter of taking money, the shadow guard did not show any mercy.

After all, the money was handed over to Li Si by Fang Xiang, and he was allowed to dispose of it.

As long as the spread of the plague can be prevented, even if Li Si buys two sick and dead cows with the money, they have no objection.

As for why he didn't want to give the old man some more coins when he entered the city.

Simply because those copper coins belonged to Shadow Guard himself.

"One thousand five hundred taels?"

The strong man stared at the silver in front of him, his eyes widened in disbelief.

How did the negotiated 800 taels become 300 taels?
The shadow guard at the side seemed to see his doubts, and said casually: "This is money for watching cattle."

"Look at the cow, I really give you 500 taels!"

When the strong man heard this, he looked at Li Si differently.

Although this is insanity, but the level of generosity, I am afraid that no one in the world can match it!

Thinking of this, Li Si greeted the guards behind him and led the two cows out.

Both cows were a little out of spirits, but they followed behind the guard obediently.

No way, with an iron ring on his nose, he had to follow.

that's it.

Li Si and the shadow guard led the cattle and came outside the city.

Then he rented a mansion outside the city with money and lived in it.

"Vaccinia, really cowpox!"

In the mansion, Li Si took out the books that recorded cowpox, compared them carefully, and finally confirmed that this was what he was looking for!
After calming down the excitement.

He looked at several shadow guards at the side and asked, "Which of you would like to be vaccinated?"

Several shadow guards stood in place without speaking.

Seeing this, Li Si said, "Those who have been inoculated with cowpox will be given 500 taels of silver."

As soon as this word comes out.

Li Si clearly noticed that the atmosphere in the mansion had changed.

"Lord Li, I have been ordered to assist you in finding a way to prevent the spread of the plague. As long as we can complete the task, we are willing to sacrifice our lives. We have already made preparations for these as long as we entered the first village, and we don't need you to pay an extra amount." Two taels of silver, you should keep the money and buy a few more cows."

The leading shadow guard stood in front of Li Si and said in a flat tone.

Li Si was taken aback when he heard this, and then realized something, showing shame, and apologized to the shadow guards: "I was found stunned by cowpox, and I said something wrong, all of you are trusted by Fang." People, following Fang Xiang from birth to death, silver is like dung in your eyes, and I am insulting you by talking about money."

"If it weren't for you, I would still have these stinky coins, and I wouldn't be safe and sound to this day. It's all because I lost my head."

"Master Li doesn't need to say more, I understand everything."

The leading shadow guard interrupted Li Si, and said seriously: "As long as it is beneficial to the mission, we will all obey unconditionally, but before that, I don't know if we know what vaccination is?"

"of course can!"

Li Si nodded heavily, stood up, and explained to the shadow guards: "This cowpox is a kind of disease on cows. Anyone who comes into contact with this disease will be infected, but this disease is equivalent to Breaking through the gap is an irrelevant thing to most people.

However, as long as you are infected with the disease and then come into contact with the plague of smallpox, you will not be infected with this plague again, and this is the best way to prevent the spread of the plague! "

When the shadow guards heard this, their faces showed surprise.

The leading shadow guard said: "Thank you, Mr. Li, for clarifying the confusion. Then, please ask Mr. Li to vaccinate us with vaccinia."

Li Si waved his hand and said, "After all, no one has ever been vaccinated against vaccinia before, so to be cautious, it is best to ask someone to try it first. If there is no serious problem, we will vaccinate this vaccinia together!"

The leading shadow guard heard this, nodded, looked at several shadow guards, nodded at one of them casually, and said, "Go."

"Yes!"

The shadow guard nodded and stepped up.

Li Si used a special needle to pierce the cowpox on the cow, and then stabbed the shadow guard's arm with the needle.

"We will stay here for the next few days, and we will not go anywhere. When we have the result, we will return to Nanwang Mansion immediately, and then we will bring these two cows back to Dagan!"

After Li Si vaccinated the shadow guard with vaccinia, he looked at the other shadow guards and ordered.

"Yes, my lord!"

Several shadow guards saluted together.

the next few days.

Li Si recorded the physical condition of the shadow guard every day.

Nine days later, he had a rash on his arm, but it was not serious.

In addition, the body temperature has also risen, but the number has remained below 38.

When I asked if there was any discomfort, the answer was no.

In case this is just an example.

Li Si vaccinated the other two shadow guards with vaccinia.

After waiting for half a month, I found that the symptoms appeared were similar, but very mild.

During this period.

Li Si also sent the shadow guards to buy three cows nearby, and inoculated them with cowpox to infect the cows.

Next, he took the three cows all the way south and returned to Nanwang Mansion.

Came to the mansion that was rented at the beginning.

As soon as he entered the door, he saw the shadow guard washing his veil in the yard.

"Brother Zhao and the others?"

Li Si looked at the shadow guard and asked.

When the shadow guard saw Li Si, his heart was finally relieved, and he said, "We are all resting in the house. Some time ago, he also got sick, but fortunately he survived."

As he said that, he took out the booklet from his arms, handed it to Li Si, and said, "This is recorded by the humble official. During this period, the three of them have symptoms."

Li Si reached out to take the booklet and read it from top to bottom.

After a while, he nodded and said, "You did a good job and recorded it in detail."

Whether it is the symptoms recorded in the book or what he saw and heard along the way, it is certain that the plague spreading in the country of Yan is exactly the smallpox recorded in the book!
It was determined that the pest was smallpox, and cowpox was also found.

There is no doubt that his trip to Yan Kingdom was almost perfect!

Next, he has to verify one thing.

He looked at the shadow guard who stayed in Nanwang Mansion, and ordered: "Pack up your luggage and go home in a few days."

"Yes!"

The shadow guard responded.

Then he asked again: "Zhao Sheng and the others, how should we deal with it?"

Li Si fell into thought when he heard this.

at this time.

Hearing the movement, Zhao Sheng came out of the room, looked at Li Si, and said, "The three of us have recovered from our illnesses. I wonder if Brother Li can take us to Qianguo together."

As soon as this word comes out.

The entire courtyard fell silent in an instant.

Behind Li Si, several shadow guards had already put their hands on the handle of the knife.

Zhao Sheng noticed the gradually tense atmosphere, and hurriedly explained: "Brother Li is from Qianguo, and you can hear it from the accent. It's not that I want to find something on purpose. As for why you want to follow Brother Li to Qianguo, It's really because I'm staying in the country of Yan and I don't know where I'm going.

My hometown has been taken by the Ouluo people, and I'm afraid I won't be able to go back for a while. Why don't I go to Ganguo with Brother Li, use some of the money I saved, open a medical clinic, continue to do my original business, and treat people? sick. "

Li Si fell silent when he heard this.

After a while, he nodded and said: "Okay, I can take you back to Qian Country, but after arriving in Qian Country, you must follow the rules and live at the border for three months before going to the nearby Fucheng. .”

"it is good!"

Seeing that Li Si agreed, Zhao Sheng showed joy and nodded heavily.

then.

Li Si looked at the three shadow guards who had been inoculated with smallpox behind him, and ordered: "In the next few days, you should hang around more often, and when you meet people who are infected with smallpox, get as close to them as possible, and try to make yourself infected with smallpox." smallpox."

aside.

Zhao Sheng was a little confused when he heard this.

I thought to myself, what happened to this Brother Li?Is this trying to bring the plague back to the dry country?

Just when he was puzzled.

He also heard Li Sidao: "After you feel that you may be infected with smallpox, you set off to return to work, and then find a place where there is no one, live for half a month, record the daily changes in your body truthfully, and hand it over to me! "

When the three shadow guards heard this, they immediately understood the purpose of the task Li Si gave them.

It is to let them verify whether they can resist the plague called smallpox after being inoculated with cowpox. If they can resist, then everything recorded in the instructions will be fine.

The next step is to inoculate cows with vaccinia on a large scale, and then inoculate vaccinia on humans to prevent the spread of the plague.

Therefore, without the slightest hesitation, the three shadow guards bowed their hands and turned to leave.

Li Si stood where he was, watching the three of them drift away, his eyes bursting with hopeful light.

Hope the three of them come back safely!

Everything went well!
Thinking so, he looked at Zhao Sheng and said, "Brother Zhao also go back to pack his luggage, we will set off immediately and return to Dagan!"

"it is good!"

Zhao Sheng nodded, turned around and went back to the house, and began to pack his luggage.

Li Si came to Yan Country for a month, finally completed the expected goal, and started to return.

Compared to when.

In addition to the loss of some silver, there were three more people and five cows.

now.

Chang'an is not too far away.

in the palace.

Wu Mingkong was holding the completed astronomical telescope sent by Shen Miao, looking at it curiously.

aside.

Shen Miao was very obedient and waited quietly.

I do not know how long it has been.

Wu Mingkong put down the astronomical telescope in his hand, looked at Shen Miao, and sincerely praised, "As expected of a great engineer in the future, he did a good job!"