Qin Huaidao was stunned for a moment when he heard what Li Chengqian said about smallpox.

"That's right, smallpox, it will come once every few years, but I didn't expect that this time it was so serious, hundreds of thousands of people were infected, and the officials in Yangzhou had a problem, and they actually let this outbreak come out, it's fatal!" Li Chengqian said and gave the letter to Qin Huaidao,

When Qin Huaidao looked at it, he also felt that the matter was serious, smallpox, in this previous life, it was something that had disappeared for a long time, but the virus would still break out, and Qin Huaidao also knew it.

"Father asked the two of us to go back now, and this place will be handed over to General Su to command, we need to return to Beijing immediately!" Li Chengqian looked at Qin Huaidao and said. "Let's go back, what's the use of us going back?" Qin Huaidao looked at Li Chengqian a little incomprehensibly,

Li Chengqian heard it and couldn't figure it out, but now that his father said so in the letter, and he sent it over in an expedited way of 800 miles, it means that his father must be in a hurry.

"Anyway, we still have to go back first, otherwise, my father won't be so anxious, maybe I'm worried about something!" Li Chengqian thought about it for a while and said.

"Worried about what? Oh, I see, go back! Qin Huaidao hadn't figured this out at first, but when he heard Li Chengqian say this, he knew that he really needed to go back, in case something happened, where Li Chengqian was, Li Shimin was so relieved.

"Let's go, let's go find General Su!" Li Chengqian said to Qin Huaidao,

In the afternoon, Qin Huaidao and Li Chengqian left Pyongyang, and the next night, they arrived in Qingzhou, and then rode from Qingzhou to Chang'an, Qin Huaidao at this moment, his mind was also thinking about this smallpox, smallpox is said to be solved with cowpox, but how to solve it, he doesn't know the specific way, however, you can go to the experiment, and now there is a medical school, then there is a solution to the problem, and it can still be solved when the time comes,

Along the way, the two of them took those personal guards, that is, galloping, unless they rested at night, otherwise, the whole day, they were riding horses and eating some dry food on the road, and the speed was very fast.

5 days later, Qin Huaidao and they had arrived in Chang'an from Qingzhou, and when they arrived outside the gate of Chang'an City, Qin Huaidao and they found that the entire Chang'an City had been closed, and they were only allowed to come out.

And Qin Huaidao said that they wanted to go in, naturally there was no problem, Li Shimin notified the guards here and told them that Li Chengqian would come back. When they arrived in Chang'an City, Li Chengqian and Qin Huaidao rode to the palace, and of course, Qin Huaidao's personal guards would also go home to inform him that Qin Huaidao was back.

When they arrived at the palace, some officials saw Li Chengqian and Qin Huaidao, and they were also surprised, they didn't expect that these two would come back now, and when they arrived at Chengtian Palace, Wang En saw that Li Chengqian and the two of them were still in the square, so he ran up to inform Li Shimin, and when the two of them arrived at the gate of Chengtian Palace, Wang En had already come down.

"The little one has seen His Royal Highness the Prince, I have seen Hu Guogong, you are back, Your Majesty will be much more relieved, quickly, please inside, Your Majesty is waiting for you inside!" Wang En saluted Li Chengqian and Qin Huaidao and said.

"Well, I'm tired!" Li Chengqian nodded with a smile, and then walked inside, at this moment he and Qin Huaidao were both in armor, and when they arrived at the fourth floor of Chengtian Palace, they saw that they were already standing there looking at the direction of the door.

"Erchen has seen his father!" After Li Chengqian and Qin Huaidao passed, they immediately saluted Li Shimin with a fist.

"Well, good, good, it's good to come back, my father is looking forward to your coming back these days, if you don't come back, my father won't feel at ease, and now that you're back, my father will be at ease!" Li Shimin went over to help the two of them and said happily.

"Let my father worry, is my father's smallpox still so serious?" Li Chengqian asked Li Shimin.

"Yes. It's still very serious, although it hasn't spread much now, but a large number of people die every day, there is no way, this disease, there is no cure, they can only rely on themselves, the father went to ask Doctor Sun, they have no choice, and those doctors over there in Yangzhou, many of them have been infected, not to mention curing the disease, it is difficult to cure themselves! Li Shimin said to Li Chengqian with a sigh.

"It can't be cured, but it can be prevented, and the medical school can organize students, including faculty, to find a way to solve this problem, and they can prescribe medicine from outside the epidemic area and let people send it to the epidemic area, there is no problem at all!" Qin Huaidao said to Li Shimin.

"Huh?" When Li Shimin heard it, he looked at Qin Huaidao.

"Father, if you can do it, don't let the doctor contact with the people inside, but it doesn't mean that you can't do things, you can let the doctors in the medical school, and even the imperial doctors in the palace go together, observe the patients over there, and then prescribe medicine, of course, the sons also know that they may not be able to find the right medicine for a while,

But on the Yangzhou side, if you don't do anything, it's not a way to watch the people find a way to deal with it by themselves, and if you do, you have accumulated experience, so, father, this matter still needs to dispatch the imperial doctor and the doctor of the medical school! Qin Huaidao stood there and said to Li Shimin.

"You're right, you're right, by the way, take off your armor and come and sit down, my father estimates that you must be very tired, and you haven't rested all the way, right?" Li Shimin reacted and said to Qin Huaidao.

"I haven't rested, my father wanted us to come back so soon, we thought something was wrong, so we hurried back on horseback, but this smallpox is indeed a big problem!" Li Chengqian also said to the inside with a sad face, and there were a few palace maids who were taking off their armor for Qin Huaidao and Li Chengqian, so that they could be more relaxed.

"Well, okay, you just came back, don't discuss this first, this time you are in Goguryeo, you fought very well, completely beyond the expectations of your father, I originally thought that this battle would be very difficult, my father was thinking, maybe in the second half of the year, the troops need to prepare to withdraw from Goguryeo, I didn't expect that Goguryeo is now completely pacified by you, and the troops are attacking Goguryeo!" Li Shimin said to them happily.

"Well, it still depends on Peping and General Su, the two of them really contributed, especially Peping, this time, the first merit, Erchen thinks it is Peping's!" Li Chengqian said to Li Shimin with a smile.

"Your Highness, that's not what you say, you are in command, we can win the battle on the front line, right?" Qin Huaidao also said to Li Chengqian with a smile.

"We are in front of our father, so we don't need to say this, you said it outside before, and I can't say anything, but in front of my father, if you have anything to say, don't use this set!" Li Chengqian smiled helplessly and pointed at Qin Huaidao and said, Qin Huaidao also laughed.

"Yes, it's really good, this battle is good in Peping, you are not bad, for the military part, I believe you also have your own understanding, very good, besides, you just need to understand, my father doesn't know that you can personally go into battle to kill the enemy, if it really comes to that time, then my Datang will be in danger, this time the purpose of going to the front line is achieved!" Li Shimin looked at the two of them with a smile and said, one is his most satisfied son, and the other is his only and most trusted son-in-law, the two of them can get along like this, Li Shimin is also happy,

Moreover, Li Shimin is not worried about Li Chengqian's future management of the world, Li Chengqian has also managed it before, and he has done a very good job, and he has not let himself worry.

"Well, Peping, my father has something I want to ask you, is there a way to completely solve this smallpox thing, smallpox will appear almost once every few years, every time it appears, a large number of people will be infected, and among the people who are infected, three or four percent of the people will die because of this, so my father hopes that you can completely solve him,

This time, I don't know how many people will be infected, in the past few days, it has not been reported, and the chief officials in several places have been infected, and there is no one to manage the whole inside, and I don't know what happened to the people inside! Li Shimin sat there and said with a sigh.

"This!" When Qin Huaidao heard this, he was stunned for a moment, and let himself solve it, this was something he didn't expect.

"Originally, my father wanted to ask you in the letter, but there was a way, but I was worried that you would not feel at ease on the way back, so I didn't write it, and my father called you back this time, hoping to solve this problem completely!" Li Shimin said to Qin Huaidao, Qin Huaidao heard it and nodded,

And Li Chengqian is also staring at Qin Huaidao, these days, they are all busy riding horses, Li Chengqian didn't ask Qin Huaidao this question, and now I think, will Qin Huaidao have a way to completely solve this problem?

"Pepin, is there a way?" Li Chengqian also looked at Qin Huaidao and asked.

"This, father, Your Highness, I'm not a doctor, if you ask me to heal, it will definitely not work!" Qin Huaidao was very embarrassed and said to the two of them.

"Hey, yes, my father was thinking at the beginning, maybe you have a way to solve it completely, but my father also knows that you are not a doctor, okay, Peping, you will eat in the palace at noon, and you will go back in the afternoon and have a good rest, Xian'er, they are also worried about you, although they have not come to your father's side to ask about your situation, but my father is clear in his heart." Li Shimin heard Qin Huaidao say this, sighed and said,

Although he was a little disappointed, he was not disappointed with Qin Huaidao, but because he had no way to deal with this epidemic.

"Father, this, this!" Qin Huaidao saw that he was so worried, thought for a while, and didn't know what to say.

"What's the matter, if you have anything, just say it directly, in front of your father, you are still secretive!" Li Shimin asked with a smile at Qin Huaidao, he thought that the worry he had just made Qin Huaidao scared.

"Father, you didn't understand what I meant, what I just meant was that those who have been infected with the disease, the sons have no choice, the sons are not doctors, but those who are not infected, the sons may have a way, so that they will not be infected in this life!" Qin Huaidao looked at Li Shimin and said,

When Li Shimin heard it, he thought he had heard it wrong, so he looked at Li Chengqian, who didn't understand much at the moment, and turned his head to look at Li Shimin.

"Peping, my father didn't understand what you said, you can talk about it carefully!" Li Shimin turned back to Qin Huaidao and continued. "Let's put it this way, if there is smallpox in the future, but the people around this patient will not be infected, then you say, even if this smallpox appears, it can only appear in this patient, and will not be transmitted to other people, so although Erchen has no way to save those patients who have smallpox, but Erchen can let those patients who do not have smallpox not get it again in the future!" Qin Huaidao looked at Li Shimin and said.

"You mean to say, you have a way, so that people don't get sick, then it's better, if you get sick, then you need to be treated, I don't know if you can be cured, wouldn't it be better not to get sick, Pepin, tell me, what to do?" Li Shimin said happily to Qin Huaidao.

"This, Erchen will not be clear for a while, but, father, Erchen needs time, and he also needs to go to Yangzhou in person, and there is that Erchen needs to prepare some materials, in addition, he needs to mobilize troops to go, Erchen needs to do experiments, that is, to verify Erchen's method, whether it is feasible or not, and then there is, Erchen needs the support of medical school, Erchen needs manpower, mainly doctors!" Qin Huaidao looked at Li Shimin and said.

"Go to Yangzhou, that can't work, that can't work, go to Yangzhou can't do it!" As soon as Li Shimin heard Qin Huaidao say that he was going to Yangzhou, he immediately couldn't say it, he didn't want Qin Huaidao to take risks, especially in such a dangerous place as Yangzhou, he asked Qin Huaidao to come back and let him think of a way, but he was also afraid that if smallpox was infected to Goguryeo, Qin Huaidao would be in trouble!

"No, father, the sons don't go to Yangzhou, the sons go to get close to those smallpox outbreaks, and they need to collect things nearby, so that it is useful, hiding in the capital, it is useless, so the sons can't solve anything!" Qin Huaidao immediately said to Li Shimin.

"That's not going to work, you can't go!" As soon as Li Shimin heard this, he immediately stopped Qin Huaidao from continuing, he hoped that this problem could be completely solved, but he also hoped that Qin Huaidao would be safe, of course he knew the importance of Qin Huaidao now, this was left by him to Li Chengqian, how could he have any unexpected situation.

"Father, don't worry, Erchen will definitely have an idea, besides, if Erchen doesn't go, if he doesn't solve this problem, even if he can get it over this time, but next time, next time, he always has to solve this problem, this smallpox, once every few years, so many people will die every time, what a pity, this is human life!" Qin Huaidao persuaded Li Shimin, if he didn't go, there was no way at all, and those people in the medical school didn't even know how to do this experiment.

：。 ：