Two or three years have passed in the blink of an eye, and now the night sky in Chang'an is brightly lit, and Li Zhi has permanently canceled the curfew in the capital and replaced it with just a patrol team.

Wang Haoran sat alone in the pavilion of the palace and admired the night sky of Chang'an, his mood is much calmer now, unlike before, he always feels that there are many things that need to be done immediately. This is not because he is old, now he is in his thirties, what is the successor of the changed Datang...... Today, Wang Haoran feels like he has completed his mission after crossing over, and has passed on the spirit of innovation that he thinks is the most important to Datang, he no longer needs to study high-tech such as mobile phones and computers, and he does not have the ability, but he believes in the wisdom of Datang people, maybe the next generation, or the next generation of the next generation...... As long as this innovative spirit can be passed on, all of this will be realized.

When Wang Haoran was drinking and entertaining himself, Xiaoyu and Wu Ruyi came over excitedly, saying that they had discovered that electric current could produce magnetic force, and the magnitude of magnetic force could be controlled by changing the size of the current.

"And how do you think this discovery can be used?" Wang Haoran asked with a smile, not in a hurry to express his opinion.

"We can make a dotting machine out of this, by changing the current size, the pen on the dotting machine will move up and down, if you change the current according to certain rules, the pen on the dotting machine will point out regular ......dots on the paper," Xiaoyu explained excitedly.

"If we take these dots and the spaces between dots and make code, each code corresponds to a word. Master, think about it, if we use a wire from Chang'an to Luoyang, change the current here to control the dotting machine in Luoyang, and then convert it into text through code in Luoyang, then if we contact Luoyang in Chang'an, it won't be a few minutes? Wu Ruyi argued and explained.

What they said was not detailed, but Wang Haoran could understand that their so-called dotting machine was actually similar to the coding machine of later generations.

"It's a good idea, we can study it." Wang Haoran said: "In addition, I have to test the two of you, why do you think we can talk?" ”

"Do you need to ask? This is because there is a vocal cord in the human throat, and the vibration of the vocal cords produces sound, which was introduced at the university. Xiaoyu said proudly.

"Oh, I didn't expect you to have the knowledge to learn about the university, not bad! Then I ask you again, since vibration can produce sound, can sound produce vibration? Wang Haoran asked again.

"Of course that's fine, but if not, then how can I receive what you say, Master?"

"Well, that's right." Wang Haoran smiled and said: "Then let me ask you one last question, you all know that the change of electric current can control the magnitude of magnetic force, if we use the vibration generated by speaking to control the change of electric current, and the other end uses this current to control the change of magnetic force, and the magnetic force creates vibration, what will be the result?" ”

Xiao Yu and Wu Ruyi were very shocked, and it took a long time for Xiao Yu to squeeze out an answer that made her feel incredible: "Long-distance dialogue!" ”

Wang Haoran smiled and nodded.

"Can this really be done?" Although Wu Ruyi recognized the feasibility of this plan, he still felt incredible.

"Of course, go get a pen and paper, I'll give you something." Wang Haoran affirmed.

Xiaoyu immediately asked his subordinates to get the pen and paper, and after the pen and paper were brought, Wang Haoran drew a structural diagram of a horn, and explained while annotating the drawings with instructions.

Xiaoyu was so excited with the drawings that she wanted to go back to study it immediately, but was stopped by Wang Haoran.

"Everything must be done step by step, and you should first study the dotting machine, and that experience is also a valuable experience that you can use in your future research."

The next day, Wang Haoran rushed to the first school early in the morning, today is the first martial arts examination since Datang created the martial arts system, and in the university of the first school, there are more than a dozen students to participate, including Zeng Chengyong's proud protégé. As the head of the first university, Wang Haoran naturally wanted to encourage him.

However, after Wang Haoran encouraged these students, he was about to go to the examination room with them, and the servants of the Wang family hurriedly ran to say that the eldest master was seriously ill, and Wang Haoran left everything behind and hurried back to the Wang family when he heard this.

At this time, Wang Furen's wife and children gathered in Wang Furen's room, and when they saw Wang Haoran coming back, they thought that this might be the last time their father and son met, and the tears that had stopped flowed down again.

Everyone made way for Wang Haoran and let Wang Haoran come to Wang Furen's bedside, and Wang Furen seemed to be still sleeping at this time.

"Ba'er, your father woke up for a while, and as soon as he woke up, he said that he wanted to find you, as if he had something urgent to explain to you, but after waiting for a while, he fell asleep again, why don't you try to wake up your father?" Wang Haoran's eldest mother Liu Min said.

Wang Haoran couldn't think of anything Wang Furen could explain to himself, so he shook his head and said, "No need, just let Daddy sleep again, I'll just guard here." ”

"What did the doctor say?" Wang Haoran asked Wang Qihong again.

Wang Qihong didn't answer, just shook his head silently.

Everyone was silent for a long time, and I don't know how long it took, Wang Furen finally woke up again, and before he could open his eyes, he asked first: "Has Ba'er come back?" ”

"Daddy, the baby is here!" Wang Haoran held Wang Furen's hand and said softly.

"Oh...... You're back! Wang Furen looked at Wang Haoran with tired eyes, and then said to the others, "You go out first, the old man has something to say to Ba'er." ”

After everyone else went out, Wang Furen continued: "Ba'er, what do you have to say to your father? ”

This stopped Wang Haoran, didn't he have something to say to himself? Why did you suddenly become yourself and have something to say to him?

"Hehe......" Wang Furen saw Wang Haoran stunned there, and said with a smile: "Your business, others don't know, will I, the father, still not know?" You knew so much when you woke up in a coma for a few days, how could you learn it in three years? Besides, you were only 10 years old at the time. So there must be a lot of things that you can't say to others, and you have been holding back for more than 20 years, you must be very bitter in your heart, right? ”

Wang Haoran's nose was sour, and he couldn't help shedding two lines of tears, it turned out that his father was so anxious to find him, just for this! Speaking of which, this secret was indeed a stone that had been pressing on his heart, but he couldn't tell anyone about it, because it was so appalling that others might not believe it, and even if someone did, it would certainly not be a good thing for him.

"I've suffered you all these years!" Wang Fu looked at the sad Wang Haoran kindly, and patted Wang Haoran's hand gently, "My father doesn't have a few days to live now, I think I can still keep it a secret for you, if you have anything to say, just tell your father." ”

"Daddy......" Wang Haoran choked up a little and changed his voice, cleared his throat and continued: "Dad, you guessed right, in fact, in that place, the child has been wandering for more than 20 years!" It's just that I think this thing is appalling, so I said it was three years. ”

"That's right! No wonder when you woke up, you were quite mature and assertive, it turned out that you had more than 20 years of experience when you were ten years old! ”

Wang Furen did not doubt whether Wang Haoran was his son, which was also something that Wang Haoran didn't want to say, this fact was a huge blow to Wang Furen.

"I wonder if I can go to that place after my father dies?" Wang Furen was very curious about Wang Haoran's fugue, what kind of world was that?

"No, it's where the living go." This secret is the most important thing for Wang Haoran.

"Where do the living go?" Wang Furen pondered the meaning of these words, and immediately came to an incredible conclusion, and said in surprise: "What you said ...... Future? ”

Wang Haoran nodded.

"How many years from now?"

"More than a thousand years."

Wang Furen was stunned, and when he came back to his senses, he thought of the stakes, and hurriedly explained: "Remember! Don't give this out to anyone else, it will do you more harm than good! ”

Wang Haoran was moved again, Wang Furen was already in danger, but he still considered his safety first at the first time.

"When you say this to Daddy, the child's heart is much more comfortable. Don't worry, the child has been holding back for more than 20 years, and it is not a problem to hold it for a few more decades. Wang Haoran said with relief.

"You can do things, and you can rest assured as a father." Wang Furen was relieved, "I don't know if there is a stroke of being a father in the historical records at that time?" ”

"Not really." Wang Haoran said bluntly.

"Haha...... There will definitely be one in the future, because the old man has two promising sons, one is the king of Yizheng, and the other is the leader of the Datang state-owned commercial house! In addition, there are two wives, a daughter-in-law is the fifth lady of charity, and Xiaoyu, the daughter of the leader of the Women's Army. By the way, I don't know if you've heard of it, since your sister-in-law was in charge of the Wang family's industry, her business has been booming, and others call her the Iron Lady! Wang Furen said optimistically, and then he felt that it was more meaningful to do something that benefited the country and the people than to make money.

"Of course I've heard about it, I really can't see that my sister-in-law will be the daughter of the Iron Mask Ming Mansion!"

"In the past 20 years, with your efforts, Datang has taken on a new look, so how similar is the current Datang compared to that time?" Wang Furen was very curious about what the Tang Dynasty would look like more than a thousand years later.

"Four or five percent, judging from the current speed of development, it may take three or four hundred years to reach the level of science and technology at that time." Wang Haoran took the trouble to talk to Wang Furen about the situation in later generations, "But at this time, there are places that are difficult to compare with at that time, the people at that time are not as simple as the people at this time, many of them are people who are interested in interests, some people do not hesitate to fool the people's cognition for the sake of profit, and some people use the monopoly of science and technology to take possession of other people's money in a grand manner for the sake of profit; There are also some people who take advantage of the kindness of others to defraud money for the sake of profit......"

"Will Datang become like that in the future?" Wang Furen suddenly lost his good impression of the future more than a thousand years later, and then worried.

Wang Furen's question shocked Wang Haoran, yes! Will the folk customs of Datang become like that in the future?

Wang Haoran has always focused on the development of science and technology, and now that science and technology have developed to this level, Wang Haoran has no more advanced technology to stay, to be honest, Chen Jun and Xiaoyu may be higher than Wang Haoran for their respective specialty projects. And the first university of Datang is continuously cultivating a new generation of successors, Wang Haoran still thinks that his mission has been completed!

But now that he thinks about it, Wang Haoran feels that he still has one more thing to do, that is, to continue the simple folk customs of the Tang Dynasty, so that the old people who fall in the future are not for extorting money, and others will not worry about this problem and can lend a hand; so that the neighbors of future generations will not close the door all day, and they will not even know who the person living next door is; and that the generations to come may fear the goodness of others......

This is an endless road, Wang Haoran's mission is not over, and he has to work hard for it all his life......

However, his path as an inventor can already come to an end.