Wulube led a delegation to Xi'an. Li En, the chief clerk in charge of receiving them, also agreed to let the delegation rest for a few days. In the past few days, he also personally took Wulube to redirect the city of Xi'an and explained to him some of the customs and customs in the Ming city.

However, what Ulube did not expect was that Li En, the person in charge of receiving him, was proficient in astronomy and even had a deep study of math, which surprised him, especially when he learned that Li En was just a low-level official, and even a low-level official understood astronomy and math, which made Ulube rekindled awe for the Ming Dynasty.

A few days later, the mission set off again, and Li En accompanied the mission back to Beijing. Shortly after leaving Xi'an, Wulube also found him again and asked: "Zhengbu Li, does the Truth-seeking Academy you mentioned really have so much magical knowledge?"

Since Wulube learned that Li En's knowledge was learned from the Academy of Quezhen, he became very interested in everything about the Academy of Quezhen, especially when he learned that the Academy was originally established by the Imperial Heaven Supervision of the Ming Dynasty, that is, a group of astronomers, which made him yearn for the Academy. After all, what he was most interested in was astronomy.

"That's natural. I am studying politics and theory, which is a kind of liberal arts. Astronomy and mathematics are not my major, but I just have some understanding. Compared with my fellow students who specialize in astronomy and mathematics, I am far from that." Li En replied with a smile.

Now the disciplines of the Xuzhen Academy have been divided into very detailed disciplines, and there are clear boundaries in liberal arts and science. However, even in liberal arts, you must learn certain science knowledge, especially some knowledge about mathematics, physics, chemistry, and biology. Only by mastering these can they more correctly understand the essence of the world.

Although this is not the first time he has heard Li En say this, Ulube still couldn't believe it because in his opinion, Li En's astronomy knowledge is already very profound, especially his understanding of the sun, the moon, and several major planets, some of which even overturned his previous cognition.

It is no exaggeration to say that with Li En's astronomy level, he is definitely a first-class astronomer in Central Asia and West Asia. However, in Li En's own words, he is just an amateur who is elective in astronomy and has only some basic understanding of astronomy. This also made Ulube even more curious about what level of astronomy in the Ming Dynasty reached?

"Master Li, I heard that the Ming Dynasty had a large ball that could fly. Since you can fly to the sky, it should be more convenient to observe astronomy, right?" At this time, Qasim, who followed Ulube, suddenly asked Li En.

The hot balloon caused Timur's army to suffer, especially this thing could fly to the sky. So after being sent back to the Timur Empire, it was also said that it was amazing. Some people even said that everyone in the Ming Dynasty could fly, suck blood and eat human flesh, and so on. Anyway, there are all kinds of outrageous rumors.

When Li En heard Kasim ask about hot balloons, he also looked at him meaningfully. Compared to Ulube, a simple child, he knew that Kasim was definitely not just asking about hot balloons, after all, this was a military secret.

However, Li En finally replied: "You said it is a hot balloon, which can take people to the sky. Speaking of which, the invention of the hot balloon has a lot to do with our college, and its original purpose was indeed used to observe astronomy."

"Really? Then what did you find when you fly to the sky? Can you take me to the sky to see when you arrive in the capital?" Wulubo asked with surprise when he heard this. He had heard the rumors that the army could fly, but he didn't believe it. Now that he has confirmed it from Li En, he has dispelled his suspicion.

Seeing Wulube so excited, Li En smiled slightly. After contacting each other these days, he liked Wulube, a young man. After all, the other party is simple and smart and studious. A few days ago, he spoke Chinese and had some accent, but now he has corrected most of the time. This learning speed also makes Li En feel inferior.

"The hot balloon was invented by Li Jie, the prince of the Ming Dynasty. He was originally flew into the sky with the people from the Imperial Heaven Prison. It was not until then that we realized that the sky was not like us. The distance between the sun, moon and stars was far beyond our imagination. With the height that the hot balloon could reach, there was nothing else except clouds. At most, it was necessary to see the moon with a telescope."

Li En paused at this point, and then smiled and said, "As for the ambassador, it is not impossible. In fact, there are hot balloons in our academy. As long as you can pass the test of controlling the hot balloon, you can go up and control the hot balloons to take off by yourself. I have been there several times before, and it is really interesting to look down at the earth from the sky."

"Mr. Li Jie, is it the one who has improved the firearm?" Qasim interrupted again at this time. In addition to the hot balloon, the Ming Dynasty's firearm was also the main reason for Timur's defeat. Therefore, after Timur returned, he also sent additional personnel to inquire about the Ming Dynasty's firearm. Although he had not obtained any useful things for the time being, he knew that Li Jie's contribution to improving the firearm.

"Yes, the prince consort is the most knowledgeable person in the Ming Dynasty. The Xu Zhen Academy was founded at his suggestion. In addition, he also invented many new things, and the hot balloon is just one of them." Li En did not hide it and replied immediately.

Li Jie is too famous and some news can't be hidden at all, so Li En is also telling the truth. Speaking of which, he and Li Jie are not only of the same surname, but also of the same clan. However, Li En's family has a long relationship with Li Shanchang, so when Li Shanchang was executed, they were not implicated.

"The most learned person in the Ming Dynasty?" Wulube's eyes lit up when he heard this. Even a person as knowledgeable as Li En admired Li Jie so much. Even the Academy of Querying Truth was founded at the other party's suggestion. He admired such a person very much and wished he could come to ask for advice now.

Compared to Ulube, Kasim next to him had a solemn expression. Although his understanding of the Ming Dynasty was still very superficial, he had an intuition that Li Jie was definitely a very critical figure. It was precisely because of his existence that Timur was defeated by the Ming army.

Li En is a qualified diplomat. He has been observing the reactions of Qasim and Ulube when he speaks. He also sees Qasim's abnormality, and he can even guess what the other party thinks.

However, Li En didn't care about Qasim's little thoughts. After all, as a victorious country, they completely interrupted Timur's ambition to advance eastward, and the initiative was also in the hands of the Ming Dynasty, so there was no need to consider the other party's ideas.
Chapter completed!