Soon Lu Yuan found various processing workshops and processing tools in the city, among which Lu Yuan once again found an unknown piece of metal.

Lu Yuan's "Chasing Waves" sword is made of this metal.

Obviously, the manufacturing technology of the Kara Empire should be very high, but what puzzled Lu Yuan was that the Kara Empire, which had such manufacturing technology, was still a society with a very strict theocracy and hierarchy.

This can be easily inferred from the neat streets and squares in the ancient city, and the temples, royal palaces, government offices, mansions and other buildings in the city.

At this time, Lu Yuan suddenly noticed that the building materials of the various buildings in the city were actually the same.

Lu Yuan was curious, and he also studied these building materials.

Eventually, he was surprised to find that none of the building materials were naturally formed, but something similar to concrete, though they were clearly of better quality and longer lasting than concrete.

Otherwise, these buildings would not have survived more than 10,000 years of abandonment.

It is important to know that the life span of concrete for modern construction is only a few decades.

From these building materials, this completely shows the superb construction skills of the Kara people.

It took Lu Yuan a whole day to walk around the outskirts of the city.

However, he was not in a hurry, and he was able to discover Manoa and slowly unravel the lost civilization on Earth, which made him feel very happy and satisfied.

The only regret is that his cultivation is too low, if he can have enough mana, he can completely collect all this ancient city into the Xiaoding space and study it slowly.

Now I can only put away some important artifacts, and if I want to study this huge city well, I can only stay in this rainforest.

Fortunately, he has a lot of time, plenty of time, and he doesn't have to worry about threats from the rainforest, otherwise he would have to go blind.

However, he still hopes to form a special team to study the Kara Empire.

No matter how strong the individual is, it is not as strong as the team, especially in the study of history and culture.

That night, Lu Yuan found a relatively well-preserved basement and rested in the basement for the night.

At dawn the next day, he began to explore the ancient city again.

Today he plans to go to the royal palace of the ancient city first, and maybe where he can gain something.

Lu Yuan pushed aside the vines at the gate of the palace and entered the palace.

Because it was so long, the interior of the palace was already overgrown with weeds and various mosses.

In what looked like it was supposed to be a palace garden, Lu Yuan found a preserved relief.

The relief depicts a samurai holding a shield in his left hand and a sword in his right.

There are also some text-like patterns on the relief, but Lu Yuan doesn't know these characters.

He put the relief into the Xiaoding space and continued to look for it in the palace.

A quarter of an hour later, he walked into a courtyard, where he found two collapsed statues.

Lu Yuan was surprised to find that these two statues were actually similar to the giant statues on Easter Island, but these two statues were more exquisite.

These two statues also show that the Kara Empire had a strong connection with Easter Island.

At this time, Lu Yuan had completely believed in the true existence of the Mu Continent and the civilization of the Mu Empire.

Lu Yuan wanted to include these two giant statues in Xiaoding Space, but unfortunately found that he still couldn't do it.

With a regretful sigh, he continued on his way. This time, however, apart from the occasional relief carved into the ruins, nothing else has been found.

However, he was not too disappointed, this is normal, there are not many things that can resist the invasion of time for 10,000 years.

After coming out of the palace, Lu Yuan moved to a building that looked very much like a library.

Here Lu Yuan found a stone tablet, which was engraved with various patterns and words.

These patterns attracted all of Lu Yuan's attention.

The most obvious thing on the stele is the pattern of more than a dozen large and small concentric circles.

Underneath this pattern is a pattern of dots and lines.

After studying these two patterns for a long time, Lu Yuan suddenly discovered that the pattern on it should be the planetary map of the solar system.

Because Lu Yuan himself doesn't know much about the astronomical knowledge of image constellations, he can't judge whether it is accurate or not.

And the picture below, Lu Yuan speculated that it should also be a constellation map.

Lu Yuan carefully put away the stele, and he was going to look for the most famous scholars in China to participate in the research after he returned.

After putting away the stele, Lu Yuan found another line of divine inscriptions in the library.

The word means "We will return!"

Lu Yuan looked at this line of words and was silent for a long time.

This line was clearly engraved later.

Now the key question is who exactly engraved this line.

Lu Yuan initially speculated that this line of writing was left by the Kara Empire.

But he quickly rejected this view again, judging by the writings found elsewhere in the city.

The Kara people did not use a divine script, but a different script.

If it was left by the Kara people, it should be in their native language.

Just like people now, when a Zhuxia person flees a place, he must have left behind in Yayu, and it is impossible to write down something like Latin.

Then the person who left this text is worth scrutinizing.

Now, judging from the situation that Lu Yuan has mastered, there are only two types of people who use the divine script, one is "witch", and the other is "qi practitioner".

Judging from the information obtained from the jade slip, even the ordinary people of the Yu Dynasty could not use the divine script.

If it is the line left by "Wu" or "Qi Practitioner", then under what circumstances did they leave it?

What exactly do they mean?

And what is the relationship between "witches" and "qi practitioners" and the Kara people? This is all puzzling.

Lu Yuan walked out of the library in confusion, and then he turned his gaze to the huge pyramid in the center of the city.

The pyramid has always been the embodiment of mystery in people's minds.

The most famous pyramid is the Egyptian pyramid, but in fact, in addition to Egypt, people have found pyramids all over the world.

For example, the Mayan Pyramids, the Pyramids of Giza, the Great Pyramid of Cholula, etc.

In particular, the Aztec Pyramid of Cholula is not only the largest pyramid in the world, but also the largest historical site ever built in the world.

However, people know that research on the Great Pyramid of Cholula has only just begun, and most people don't know much about it.

The most mysterious in the eyes of people has always been the Pyramid of Khufu. It is also the most studied pyramid by humans.

The Pyramid of Khufu is the largest pyramid in Egypt and is located in Giza, just outside of Cairo, the capital of Egypt. Until the discovery of the Great Pyramid of Chorula, it was also considered the largest pyramid in the world.

Even now, there are many people who mistakenly believe that the Pyramid of Khufu is the largest pyramid in the world.

The original height of the pyramid of Khufu is 146.5 meters, due to the weathering of time, the top is peeled off 10 meters, and now it is 136.5 meters high; the base is more than 230 meters long on each side, 220 meters long now, the triangular slope is 52 degrees, the bottom area of the tower is 52,900 square meters; the tower body is made of 2.3 million stones, each stone weighs 2.5 tons on average, and the largest weighs 160 tons.

Some scholars estimate that it would take about 600,000 wagons to transport the stone from the pyramids by train, and that if the stones were chiseled and paved into a one-foot-wide road, they would have circumnavigated the globe.

It is said that it took 100,000 people 30 years to build it. The passage inside the pyramid is open to the public, and the passage is intricately designed and calculated, which is admired by the world.

But the more surprising miracle is not the majestic figure of the Pyramid of Khufu, but the numerical "coincidence" that happened on the Pyramid of Khufu.

It is already known that because the Earth's orbit is elliptical, the distance from the Earth to the Sun is between 146.24 million kilometers and 151.36 million kilometers.

It is for this reason that the average distance between the Earth and the Sun is 149,597,870 kilometers as an astronomical unit of measurement (modern science has accurately measured the average distance between the Sun and the Earth at 149,597,870 kilometers, which is about 15,000 kilometers).

If we multiply the height of the Pyramid of Khufu by 1 billion meters, the result is 146.59 million kilometers in the range of 146.24 million kilometers to 151.36 million kilometers.

In addition to these astronomical figures, the circumference of the base of the Pyramid of Khufu if divided by twice its height gives a quotient of 3.14159, which is pi.

Its accuracy far exceeds the 3.1428 calculated by the Greeks, and is almost exactly the same as that calculated by the Chinese Zu Chongzhi between 3.1415926 --- 3.1415927.

At the same time, the right-angled triangular chamber inside the Pyramid of Khufu, with a ratio of 3:4:5 to each side, embodies the value of the Pythagorean theorem.

In addition, the total weight of the Pyramid of Khufu is about 60 million tons, which is exactly the weight of the Earth if multiplied by 10 to the 15th power!

Not only that, but the structure inside the pyramid is also amazing.

Inside the pyramid there are usually passages with holes in the direction of the constellations Canis Major and Orion.

In fact, the strangeness of the Pyramid of Khufu has long been beyond the imagination of people on earth. In Lu Yuan's eyes, the most incomprehensible thing about the pyramid is its pyramid energy.

The first to discover that the pyramid has a mysterious power was the Frank Bobby, when he entered the Great Pyramid to investigate, he found that the temperature inside the tower was high, but the remains of the creatures in the tower did not decay, but dehydrated and dried up, and were preserved for a long time.

As a result, Bobby speculates that there may be some kind of incredible force at work inside the tower.

Later, many scientists also conducted various experiments, which not only proved that the pyramid can preserve animal carcasses, but also keep food fresh, make the blade sharper and last longer, and even improve the germination rate of plant seeds.

Lu Yuan looked at the huge pyramid in front of him at this time, and he was also thinking in his heart, what is the magic of this pyramid?