Zhao Yao, who was far away in Lingnan, received a letter from the King of Chu, in which the King of Chu informed Zhao Yao that King Zheng was about to return to the capital from Jiaozhou.

After Zhao Yao received the letter, he immediately sent someone to tell Princess Annan about it. After Princess Annan learned about it, she personally came to the swamp mansion to find Zhao Yao. She quietly came to the Swamp Mansion and then left without a sound.

"What did you say to Princess Annam?" When Zhao Yao was talking to Princess Annan, He Lianfang was not present.

"I told her everything King Zheng has done in Jiaozhou over the years, and I don't know what she will do when she arrives in the capital." What King Zheng has done in Jiaozhou over the years can be described in one word - it is difficult to write.

He Lianfang asked, "You didn't give her advice?" ”

Zhao Yao shook his head slightly: "No, she doesn't need me to help her come up with ideas." "Princess Annan hates King Zheng so much, and it is estimated that she has simulated many scenes of revenge against King Zheng in her mind over the years.

"Anyang Mansion is not a vegetarian, do you think she can succeed?"

"Relying on her alone, it is indeed difficult to find King Zheng for revenge, but the fourth brother and the starling brother will secretly help her." Zhao Yao said with a smile, "The reason why the fourth brother proposed to his father that King Zheng return to Beijing was to get rid of King Zheng. ”

"The King of Chu and the King of Wei, why do they hate King Zheng so much?" Although King Zheng and King Chu are competitors to win the heir, so are King Dai and King Jing, and they don't see King Chu and King Wei bent on killing King Zheng.

"Of course, it's because of the things that King Zheng did."

He Lianfang didn't believe it, "The things that King Zheng did didn't hinder the King of Chu and the King of Wei, did King Zheng offend them before?" ”

"I don't know, maybe there is." Zhao Yao asked the King of Chu about them before, and they all said that King Zheng was not worthy of being a human being and deserved to die.

"Does it have anything to do with you?" He Lianfang intuitively felt that the King of Chu had always wanted to put King Zheng to death, and there must be other reasons. can make the king of Chu and the king of Wei hate so much at the same time, it is estimated that it has something to do with Zhao Yao. Only things related to Zhao Yao, the king of Chu and the king of Wei would be so angry. "Did you have a holiday with King Zheng?"

"Something to do with me?" Zhao Yao looked surprised, and then said innocently, "I have no grievances with King Zheng." ”

"It really has nothing to do with you?"

"No, it doesn't matter at all." Zhao Yao said, "As far as King Zheng did things, I wanted to kill him, and there is nothing strange about the fourth brother and the starling brother who want to get rid of King Zheng." ”

He Lianfang felt that Zhao Yao's words made some sense, so she didn't talk about this matter anymore, and changed the topic to talk about other things.

"Is the pistol ready?"

"It's coming." Zhao Yao smiled bitterly, "Second uncle, don't rush me, Beishan has been doing it all the time, and he is not lazy." ”

"It's better to be like this."

At this moment, Tongxi hurriedly walked in. He didn't care about saluting, and hurriedly said: "Your Highness, Nanshan Farm said that the cowpox was successful, let you go over and take a look." ”

"Cowpox succeeded?" Zhao Yao shouted with surprise on his face.

"That's what the man said."

"I'll go over now." Zhao Yao was so anxious that he didn't even say hello to He Lianfang, and went out in a hurry.

Nanshan Farm is a little far away from the Han Wangfu, and it only takes an hour to arrive on weekdays, but Zhao Yao is in a hurry to go, and he will arrive in half an hour.

When Dr. Tong saw Zhao Yao, he was about to salute, but was helped up by Zhao Yao.

Zhao Yao asked eagerly, "Tell me what's going on?" ”

Next, Dr. Tong told Zhao Yao about the cowpox in these days.

In this cowpox experiment, Zhao Yao asked Dr. Tong to experiment separately according to age. For example, from 6 to 10 years old, 11 to 15 years old, 16 to 20 years old, 20 to 30 years old. Forget it if you're over thirty years old.

Of course, the people who participated in the cowpox experiments were slaves of the Wa Kingdom. It wouldn't be a pity if they died in the process of planting cowpox. It would be too cruel to use the people of the swamp mansion for experiments.

During these days, cowpox experiments were carried out, and a dozen or twenty slaves died, and many slaves were seriously ill. Fortunately, it finally worked.

Dr. Tong carefully recorded everyone's reaction after being inoculated with cowpox, as well as their physical condition after successful vaccination.

Zhao Yao looked at Dr. Tong's records in detail, and after reading them, he exclaimed: "You have done a very good job, you have made meritorious contributions this time, and it is a great achievement in the world." ”

"It's all a loss to Your Highness."

"I'm just telling you the idea, but you're the ones who did the experiment." Zhao Yao said with a smile on his face, "You have been risking experiments all these days, which is really very hard and amazing. ”

Hearing Zhao Yao say this, Dr. Tong was very moved. His eyes were red, with tears in his eyes, and his voice was a little choked: "Your Highness, this is what the ministers should do." ”

"I will tell my father what you have done during this time, and I think my father will definitely reward you." Zhao Yao said again, "Of course, I will also reward you." ”

Doctor Tong said excitedly, "Your Highness Xie." ”

"If you succeed in planting cowpox, you will save the lives of many people in the future, which is a great merit, and you will leave a strong mark in the history books."

"Your Highness, this is all thanks to you. If it weren't for you, the ministers wouldn't have been able to do cowpox. "As healers, they could not have imagined that smallpox could be prevented by planting cowpox, but His Highness did.

"You write a detailed copy of the cowpox, and I will send it to the capital when the time comes."

"Yes, Your Highness."

"By the way, my father may let any of you go back to the capital, you can see who you let go back to the capital when the time comes, and teach the imperial doctors to plant cowpox." As soon as Zhao Yao finished speaking, he suddenly remembered something, and said, "If any of you want to go back to the capital, tell me, I won't stop you." ”

When Dr. Tong heard this, he was shocked. He hurriedly said: "Your Highness, the ministers are by no means ungrateful, and they have no intention of returning to the capital. The ministers were framed and excluded at the beginning, and they couldn't get along in the capital, but you took in the ministers, and you trusted and valued the ministers, and the ministers were willing to follow you all the time. ”

"You misunderstood me......"

Doctor Tong rudely interrupted Zhao Yao's words, "Your Highness, although the capital is prosperous, the ministers are unwilling to go back. Since the ministers came to Lingnan, they have liked it here. The ministers will also follow you to build hospitals, build medical schools, and teach the people of Lingnan to study medicine. You can't afford to wait. ”

"Since you don't want to go to the capital, then continue to stay in Lingnan." Zhao Yao said with a smile, "I wish you would stay in Lingnan and help me build a hospital and a medical school." ”

"Your Highness, rest assured, the ministers will never leave Lingnan."

"You choose two people, and then go to the capital to teach the imperial doctors to plant cowpox." Although it will be said in the recital that the process of planting cowpox will be written in detail, but it is necessary to arrange for experienced doctors to return to the capital and teach the doctors hand in hand, otherwise they will let the doctors explore by themselves, and they don't know what will go wrong. "After the cowpox is successfully planted, you should not rush back to Lingnan, first go to your home to reunite with your relatives, and wait until I return to the capital next year, and then you will return to Lingnan with me."

Doctor Tong looked surprised: "Your Highness, you are going back to the capital next year, what are you going to do when you go back to the capital?" He remembered that the prince went to the fiefdom, and without the emperor's call, he could not leave the fiefdom without permission.

"Marriage." Zhao Yao said helplessly, "Next year I will go back to the capital to get married." ”

Doctor Tong then remembered that their Royal Highness has not yet married, "Your Highness should also get married, and there should be a hostess in the Han Palace." ”

Zhao Yao waved his hand, not wanting to talk about his marriage anymore.

"Now that we've succeeded in planting cowpox, we'll start planting cowpox for kids tomorrow." There is no need for adults to get cowpox. Even if it is planted, it has no effect. It is more useful for children to have cowpox. "You can plant it until you reach adulthood."

"Yes, Your Highness."

"By the way, the cowpox planting has been successful, and now you can make the pill for killing worms." When it comes to insect fighting, Zhao Yao thinks of seeing children some time ago...... Forget it, don't mention it, or he'll be disgusting again. "Now that you have white sugar, you can try adding it to the pills so that the kids will enjoy it." There are many snakes and insects here in Lingnan, and because of the warm climate, there are many parasites, so the people here have a lot of worms in their stomachs.

Although you can drink medicine to fight insects, it is really bitter to drink medicine. Zhao Yao thought about making the pagoda candy of Zhao Yao's world in his dream. Sweet pills that kids will definitely love to eat.

"Yes, Your Highness."

Zhao Yao explained a few more words before leaving the farm in Nanshan. He did not return to the Han Palace, but went to Beishan.

He went just in time, and the craftsmen of Kitayama succeeded in making pistols, and after several experiments, they were more flexible and easy to use than the previous firecrackers, and the accident rate was less than that of firecrackers.

Originally, he planned to stay in Beishan and go back in a few days, but thinking that He Lianfang and Uncle Gao had been waiting for the pistol, Zhao Yao took the pistol and hurried back to the Han Palace.

He Lianfang had been waiting for Zhao Yao, and when she saw him coming back, she hurriedly asked him, "What kind of cowpox did you say really succeed?" He had heard Zhao Yao talk about the experiment of planting cowpox before, and he knew in his heart what it meant to be successful in planting cowpox.

"It's successful, it's very successful, and tomorrow we start inoculating cowpox for children who turn six." Zhao Yao said with joy on his face, "If you plant cowpox, the children will no longer get smallpox." ”

"It's only for children, but what about adults?"

"Adults don't need to plant, and planting has no effect, so let's plant it for children."

He Lianfang nodded and said, "It's also good to plant for the children." ”

"Another good thing happened, second uncle guess what?"

He Lianfang thought that Zhao Yao went to the farm in Nanshan, and guessed that the good thing should be related to the farm.

"You let the silkworms raised on the farm spin silk?"

"It's not." Zhao Yao didn't tease He Lianfang, he directly took out two pistols from the backpack on his waist and put them in front of He Lianfang. "The pistol was made."

The moment He Lianfang saw the pistol, a pair of eyes suddenly became bright, and her expression became very excited, she hurriedly picked up a pistol, looked at it carefully, and then asked Zhao Yao to push him to the yard, he wanted to try the pistol.

"Second uncle, what do you think of the pistol?"

He Lianfang couldn't put it down: "Great, really good!" ”

Seeing that He Lianfang loved pistols so much, Zhao Yao was also happy in his heart.

"This is the first version, and it will be improved later." The pistols are still a bit big now, and they will have to be improved and made smaller in the future.

"This is still the first version?" He Lianfang was shocked.

"Yes, it can be improved, and it will be better than the one you have now." Zhao Yao thought of the cost of making a pistol, and said with a slight frown, "The production cost of a pistol is too high, so let's make less in the future, let's make more firearms." ”

"You can do it yourself." He Lianfang has already obtained the pistol and will no longer urge Zhao Yao to make an improved version.

"I'm going to write a recital to my father, and I'm glad you to go and get Uncle Gao back." These days, Uncle Gao has been urging him to make a pistol, and now that he has made it, he has to give it to him quickly.

Half an hour later, Uncle Gao returned to the Han Palace, and when he saw the pistol, he kept shouting in the courtyard excitedly. Like He Lianfang, he can't put down the pistol, and when he has dinner, he takes it out from time to time to see, touch, and kiss.

Fortunately, the bullets in the pistol were finished, otherwise Zhao Yao was really worried that Uncle Gao would make the gun go off if he took it like this.

The emperor, who was far away in the capital, received Zhao Yao's recital. This memo describes his success in diverting water from Marsh Lake to Marsh Mansion, and then he proposed that this method of diversion be used on West Lake in Quanting County.

After reading it, the emperor immediately called the Ministry of Works.

After reading Zhao Yao's excerpt, the Ministry of Industry Shangshu trembled with excitement, and his mouth kept praising His Royal Highness King Han as a genius.