Li Xiu was reluctant to go on stage, Xiao Yu was ready to pick a student of Li Xiu to go up, anyway, there were a few students from the academy on the stage, which made Li Zhi very excited, originally his personality was more introverted, but under Li Xiu's deliberate cultivation, his personality has also changed a lot, and he already knows how to fight for himself.

Seeing Li Zhi's excited appearance, Xiao Yu hesitated for a moment but turned to Ping An Lang, after all, Li Zhi is too young, in contrast, Ping An Lang is already a teenager, and his bearing is more calm, plus he is Li Xiu's son, and he has been educated by Li Xiu since he was a child, so he must be better than ordinary students.

Thinking of the above, Xiao Yu immediately stretched out his hand and pointed at Ping An Lang and said: "I think Ping An Lang is good, didn't the horse say last time that he wanted Ping An Lang to come to the academy to study, I think let him come to the stage now and represent the students in the academy in advance!" ”

"Why don't you choose me?" Li Zhi was very disappointed when he saw that Xiao Yu didn't choose himself, but Xiao Yu ignored him, others cared about the identity of Li Zhi's prince, but Xiao Yu didn't care, especially the academy was still his territory.

Li Xiu saw Xiao Yu choose Ping An Lang to come to the stage, and he didn't stop him at the moment, but Ping An Lang comforted Li Zhi a few words, and then followed Xiao Yu to the stage, and at this time, the scholars on both sides had already sat down, and the audience of thousands of people around them also sat around these scholars, and the whole venue was silent, and everyone was waiting for the beginning of this discussion.

After Xiao Yu came to the stage, he took the lead in standing up and arched his hand to the foreign scholars such as Zamas and Phocas on the opposite side: "Below is Xiao Yu, the mountain chief of Zhongnan Academy, and everyone on the opposite side are famous scholars from Rome and Persia. ”

Not all of these Persian and Roman scholars were as proficient in Chinese as Zamas, so Li Xiu also found some translators for them, most of whom were Persians or even Romans living in the Tang Dynasty, and these people were proficient in both Chinese languages, no worse than Bahra.

Seeing that the Tang Dynasty let himself discuss the topic first, I saw that Zamas and other scholars also discussed it, and then I saw Zamas be the first to stand up and say: "Since everyone from the Tang Dynasty handed over the first topic to us, then we are not welcome, and the Persian envoy Zamas is quite good at historiography, so I am very interested in the history of the Central Plains, I wonder which scholar of the Tang Dynasty can tell me about it?" ”

Historiography is also one of the subjects that Confucianism is best at, and the Central Plains has always had the habit of repairing history, there were history books before the emergence of Confucianism, and all dynasties have not been broken, which is very rare in the entire history of mankind, it can be said that the richness of historical materials in the Central Plains is far from being comparable to the civilizations of other regions.

There is no need for Xiao Yu to open his mouth at all, and immediately an old man with white hair stood up, starting from the Three Emperors and Five Emperors, counting the Xia, Shang and Three Dynasties, and then turning to the Spring and Autumn Period and the Warring States Period, and also specially explained the life of Lao Tzu, Confucius, Mencius and others, and finally from Qin to the Two Jin Dynasty, the establishment of the former Sui and the Tang Dynasty, etc., although this old man has been as brief as possible, but he still talked about it for nearly half an hour.

After the Tang Dynasty finished speaking, in response, Zamas also personally explained the history of Persia, and then there were Roman scholars who explained the history of Rome, compared with other historiography is a relatively independent discipline in various countries, and there is nothing to dispute, and the Tang Dynasty also told about the records of Persia and Rome in the Central Plains history books, which shocked Zamas and others, their history books did not have such detailed records, and they did not know that the two sides had contacts when they were far away in the Han Dynasty of the Tang Dynasty.

After the discussion of historiography, the Tang Dynasty began to come up with the topic, and this time it was Li Xiu's old acquaintance, that is, Li Chunfeng, who helped him write "Li Gongzi's Arithmetic", he was responsible for teaching astronomy and arithmetic in the academy, and the topic he chose this time was astronomy, which is also what he is best at.

Rome and Persia also have high achievements in astronomy, such as Ptolemy, who was the culmination of ancient Roman astronomy, was born in 85 AD, that is, the Eastern Han Dynasty in the history of the Central Plains, and more coincidentally, Zhang Heng, the most famous astronomer in the Han Dynasty, was born only seven years earlier than Ptolemy, both of whom were the most famous astronomers in human history, but they were born in the same period, and in their understanding of astronomy, the two also have many similarities.

Human beings have an innate curiosity about the sky, so whether it is in the Central Plains or Rome and Persia, astronomy is a hot spot, and scholars on both sides are also expressing their own opinions, compared to historiography that has no points of contention, there are too many places to argue in astronomy, even if the general direction is the same, but there are many different views on the details, so the debate atmosphere on the field is very strong for a while.

Rome and Persia are very close to each other, even if they have different beliefs, but they are very frequent in cultural exchanges, and in astronomy, most of them are based on Ptolemy's "Almagama of Astronomy", and in Ptolemy's view, one of the most important is geocentrism, that is, the earth is fixed in the middle of the universe, and all other celestial bodies revolve around the earth.

Although geocentrism was the first invention of Aristotle, it was carried forward by Ptolemy, and scholars in Rome and Persia also held this doctrine, and there was a similar view in the Central Plains, but with the popularization of astronomy by Li Xiu, astronomers, including Li Chunfeng, have understood that the earth is not fixed, but revolves around the sun, and the sun is also moving, far from the center of the universe.

As a result, the two sides also launched a fierce debate around whether the earth is fixed or not, although the view of Datang is correct, but in this era after all, there is no strong evidence, so the two sides argued for a long time, and finally the sky was dark, but they also failed to argue about any result.

However, in the end, Li Chunfeng invited astronomers from Rome and Persia to go to the academy's stargazing platform at night, where there is a special telescope that can observe celestial bodies, of course, this astronomical telescope is far inferior to the astronomical telescopes of later generations, otherwise it can prove that the earth is also in motion.

It was getting late, and the debate on the first day was mainly focused on astronomy, but unfortunately the two sides did not come up with a result, but this did not affect the high mood of both sides, that night, Zamas and these people lived in the academy, in fact, the entire discussion conference may take several days, or even more than ten days, after all, the two sides have too many similarities and differences, and they cannot be discussed in just one or two days.

Early the next morning, the conference continued yesterday's topic, but both sides had already expressed their respective views on the astronomical debate yesterday, and even if Li Chunfeng asked the scholars of Rome and Persia to look at the starry sky with telescopes yesterday, they still could not change their views, especially the scholars in Rome, who were even more stubborn.

In fact, geocentrism is not only an astronomical theory for Rome, but also related to their religion, the Eastern Roman Empire belongs to the scope of Orthodox Christianity, although it is somewhat different from Catholicism, but it is still the same in essence, so they are also the same as Catholicism, and have always held the geocentric theory, you must know that later Bruno was burned alive by the church because of his opposition to geocentrism, and now he naturally will not easily believe in the theory that the earth revolves around the sun.

So the two sides debated again for a morning, and in the end no one could convince anyone, and this topic was also debated for too long, so under the auspices of Xiao Yu's Zamas, the two sides stopped debating, and also exchanged gifts, Datang gave each other a map of the nine planets of the solar system drawn by Li Xiu, while Rome gave Datang a map of Ptolemy's eleventh yesterday, that is, with the earth as the center, outward to the moon sky, Mercury sky, Venus day, solar day, Martian day, etc., although this is a wrong star map, But the influence in the West is enormous.

The debate on astronomy came to an end for the time being, and then the two sides discussed geography, medicine, philosophy, and other theories, and the whole conference lasted for more than half a month, and during this period, scholars continued to come to join it, and at the same time, it also attracted countless audiences, and even finally even Nanshan Academy, which had always been at odds with Zhongnan Academy, also sent people to join in this rare discussion of the collision of Eastern and Western ideas.

Li Xiu has not been on stage from beginning to end, but he has seen it from beginning to end, especially when discussing medicine, Ping An Lang also spoke enthusiastically, telling the theory of traditional Chinese medicine, and even invited Sun Simiao the next day, because Rome and Persia also have very unique views in medicine, especially Rome is very good at treating eye diseases, which also aroused Sun Simiao's interest, and he humbly asked each other for advice many times.

And scholars from Persia and Rome also saw the magic of Tang Dynasty medicine with their own eyes, because Sun Simiao took action on the spot, diagnosed and treated each of them, and brought out some of their physical problems one by one, which made these people also respect Sun Simiao as a god.

With the passage of time, although this conference was very exciting, it finally came to an end, after all, the scholars from Persia and Rome came this time were limited, and their missions to the Tang Dynasty also had their own tasks, so it was impossible to continue debating, but through these days of debate, it was enough for both sides to realize each other's civilization and achievements.

However, just as the conference was about to end, on the evening of one day, the Persian envoy Zamas suddenly came to Li Xiu's house to ask for another meeting, and Li Xiu had been waiting for this day for a long time, because there were still many things that had not been explained in the last meeting, especially about Bahla, so he had already guessed that Zamas would definitely come to see him again.

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