Around the end of the day, the temple of manna.

After Li Er finished dinner at his eldest grandson's, he moved here and began to continue to "work overtime".

As the emperor, Li Er's daily life is actually much more "hard" than Li Zexuan's, and for him, "working overtime" is commonplace.

The hall was quiet, and from time to time a cool breeze of a summer night blew in, swaying with the candles on the walls, and occasionally there was a cry of gnats outside the hall, as if to send a hymn to this peaceful night.

About half an hour later, after Li Er finished reading the last letter, he breathed a sigh of relief, half leaned back on the dragon chair a little tiredly, and then looked at the candle flame in the hall, and was distracted for a while.

He was thinking about the telegraph he had seen in the Quirky Pavilion workshop in the afternoon.

To tell the truth, the telegraph, a tool that can transmit news to each other more than ten miles apart, before today, Li Er only thought that only immortal figures would have this kind of artifact, but today he not only saw it in person, but the maker of this artifact turned out to be just a fourteen or fifteen-year-old boy, which really subverted Li Er's cognition.

On the way back, although Li Er's face was silent, his heart was turbulent and difficult to calm down.

"Of course, this is only theoretically possible to be intercepted, because the principle of making the telegraph is only proficient in the whole world!"

The words that Li Zexuan said in the afternoon kept echoing in Li Er's mind.

Arrogance, there is no doubt that arrogance is revealed everywhere in this sentence, but people have arrogant capital!

Before Li Yuan was only the Duke of Tang Guo, Li Er, as the second son of the Duke of Guo, not only had a famous teacher to teach him in martial arts, but also had certain attainments in literary accomplishment, so Li Er in the early days could be called both civil and military.

Although he did not read more than 10,000 volumes, but his knowledge is absolutely good, especially in the last years of the Sui Dynasty, Li Er rebelled with Li Yuan from Taiyuan, all the way like a bamboo, swept the world, and finally settled in the Central Plains, and now, he ascended the throne, his identity has changed again and again, step by step, correspondingly, his experience and knowledge are naturally becoming more and more extensive, even so, he has never seen such a thing as a telegraph, and he has never heard of the telegraph principle explained by Li Zexuan. He was very sure that the knowledge that Li Zexuan said had never appeared in the world.

"Not to mention that this Lingxu real person has extremely high martial arts and unparalleled medical skills, not to mention that his knowledge is so profound, does this kind of person really exist in the world?"

At this moment, Li Er had a trace of curiosity, or suspicion, about the real person of Lingxu who he had never seen with his own eyes and only existed by word of mouth.

"Could it be that he doesn't belong to the world? Aren't these learnings that Li Zexuan showed come from the Immortal Family? ”

Li Eryi thought wildly, but he couldn't think of a reason, and after a while, he suddenly commanded: "Pass on the King of Wei!" ”

has a deeper contact with Li Zexuan, and is also familiar with his knowledge, Li Tai can be regarded as the number one in the ranking, Li Er decided to ask Li Tai well.

The scooter, the zigzag plow, the paper machine, and the compass were all good to say, although these things were cleverly constructed, they were still within the scope of Li Er's cognition, but Li Zexuan's telegraph machine this time was a little too much.... It's too mysterious, yes, it's mysterious, as if this thing doesn't belong in this world.

It is for this reason that Li Er plans to ask clearly.

.......................

"Erchen has seen his father!"

About two quarters of an hour later, the fat Li Tai arrived at the Ganlu Palace, this can't be blamed on him, among the adult princes, Li Tai is a special case, Li Er specially allowed him to build a mansion in Chang'an, this treatment, it is simply close to the crown prince Li Chengqian.

The Wei Palace, there is still some distance from the palace, and at this time, all the gates of the palace have been closed, although the eunuch has Li Er's warrant, and he can take Li Tai into the palace unimpeded, but it will take a lot of time to sit in the hanging basket all the way and cross the palace wall.

"Excuse me, come here, give me a seat!"

When Li Er saw this chubby son, he couldn't help but be happy in his heart, he has always been quite fond of Li Tai, in addition to Li Tai's brilliant intelligence, it may not have something to do with Li Tai's rather happy body type.

"Thank you, Father!"

Although Li Tai didn't know what Li Er had done when he called him over so late, he was confident that he hadn't done anything out of the ordinary recently, and of course he was true in his heart.

"Qingque, I called you late at night because I wanted to ask you something."

Li Er waved his hand and motioned for the rest of the palace maids and eunuchs to retreat, and then the father and son greeted each other routinely for a while, Li Er went straight to the point and said.

"Father, please speak, the son must know everything, and the words are endless!"

"Well, Qingque, count the days, you went to Guozi to listen to the class, it's almost more than a month, I heard before, you are in the Mathematics Museum, your grades have always been among the best, I am very relieved, I want to ask you today, how much do you know about Li Zexuan's knowledge?"

When talking about Li Tai's achievements, Li Er's face couldn't help but glow with a hint of pride, his son's grades are good, and he will indeed be happy when he is Lao Tzu, even if Li Er is an emperor, he will not be an exception.

Hearing Li Er's question, Li Tai couldn't help frowning, he didn't know what Li Er's question meant, and after thinking for a long time, he replied:

"Back to my father, the longer my son stayed with Mr. Li, the more I felt that Mr. Li's knowledge was like a sea, just talking about arithmetic, Erchen was sure that no one in the world could beat him in this regard, the concept and method he proposed, Erchen later searched all the ancient books and couldn't find it, in arithmetic, Mr. Li should be a family of his own, and using his doctrine, the solution is often faster and more accurate!"

Speaking of this, he was as proud as Li Tai, and he couldn't help but show a hint of admiration on his face.

This subtle expression was naturally captured by Li Er, and he couldn't help but feel a little surprised in his heart.

"What about anything other than arithmetic? Have you ever known about the green finch? ”

"Outside of arithmetic?"

Li Tai glanced at Li Er curiously, he seemed to understand something.

"If you want to talk about Mr. Li's knowledge outside of arithmetic, what impressed Erchen the most was the assumption of the nature of the earth that Mr. Li explained to a few of us when he was making a compass before."

"Oh? The nature of the earth? What is the nature of the earth? Tell me about it! ”

Li Er couldn't help but ask curiously.

"Back to my father, in order to explain to a few of us why the compass can indicate the direction, Mr. Li once said that the earth under our feet is a sphere, and the sphere itself is still a big magnet..............."

Li Tai slowly recounted the scene of that day, and Li Er listened carefully to this magical fantasy like a Arabian Nights, and the more he spoke, the horror in his heart became bigger and bigger.

……………………

(End of chapter)