Lin Yunjue nodded approvingly. When I happened to come to Yuzhuang, I encountered a good thing in time, of course, I had to go to see it for a long time.

As the sound of flowing water and words gradually fell, the canopy boat came to its destination, and Lin Yunjue said goodbye to the boatman and walked into the house with Theros. There is nothing special about the house, the self-contained two-storey house blends perfectly into the surroundings.

Lin Yunjue put down his luggage and carefully searched the entire house, from the ceiling above, to the dark corners below, holding the mood of a tourist, with detective glasses.

Although he knew that the chance of being monitored was almost zero, habit still drove Lin Yunjue to act.

After confirming that it was correct, Lin Yunjue comically patted the dust on his body, and his eyes in magnifying glass mode continued to look for the target. The target was now elegantly standing in front of the kitchen window, looking out at the world in a daze.

Lin Yunjue coughed lightly and smiled at Theros: "Do you want to go together to familiarize yourself with the surrounding environment?" ”

Theroth's eyes regained their look, and she turned her head slightly, a happy smile on her lips.

"Yes!"

……

Yuzhuang, although it is a town invaded by the river, can still do not rely on the boat to travel the whole city by land, and the basis is that the stone arch bridges of different shapes.

The two ends of the stone arch bridge connect to the nearest public section. Located in the center of Yuzhuang, there is a flyover supported by an artificial island, and the eighteen entrances and exits are evenly distributed in densely populated areas, which is also the most prosperous place for Yuzhuang business.

There are many people, and the noisy noise carries a heat wave, constantly eroding people's visual eardrums, and students wearing school uniforms are faintly visible. Lin Yunjue is like a curious baby, constantly looking forward to the surrounding scene.

As if they were traveling, Lin Yunjue and the others unconsciously came to the lighthouse, stood on the tallest building in Yuzhuang, looked at the junction of half the sea and half the city, and already had a preliminary idea of the town of Yuzhuang.

Although Yuzhuang is not a thousand-year-old city, it is not far behind. The characteristics of the houses in the ancient city lie in unity, and under the influence of environmental factors such as topography, soil, and climate, people have experienced a long time of exploration to create a unique architectural shape of the local area. But here, there is a stride in the progress of the house, the oldest houses are located in the outskirts of the town, and the progress is constantly inward, and the evolution of the house is intuitively seen, and the closer the house is to the inland, the pressure on the water is also increasing.

Lin Yunjue set his eyes on the ocean, and on the distant horizon, there were occasional calm waves, but underwater, there was the oldest city in Yuzhuang, and the huge city wall, the underwater dam.

The seabed topography of Yuzhuang is roughly basin-shaped, with half of the edge occupied by mountains and rivers, and the other half of the submarine mountains, and the towns are like branches growing in a pot, not only filling the pot to the brim, but even trying to break through the pot.

As the global climate warms and sea levels rise, Yuzhuang, located at a low altitude, is in danger of being submerged. Hundreds of years ago, when sea levels rose at the fastest rate, the outlying urban areas were the first to be submerged, and then people tried their best to build dams on the flat submarine mountains to alleviate the crisis of Yuzhuang's continued inundation.

At the same time, not only the underwater dam was built, but also one hundred and eight giant drainage pipes. The drainage pipe is close to the dam, has a diameter of ten meters, and has a built-in 100-layer filter. When the dam blocked the sea from going deeper, Yuzhuang opened 28 drainage pipes to remove the seawater from the town, and the fresh water from the north poured in, gradually squeezing the seawater boundary out of the dam, and the area inside the dam, that is, the submerged old city, became a freshwater farm.

Giant drainage pipes are not only in Yuzhuang, but also in other coastal areas in the south of Dongyun, and the number is not as much as that of Yuzhuang. The discharged seawater does not flow back into the sea, except for a small part of human use, the rest is transported through thousands of kilometers of pipelines into the world's architectural wonder - the sinkhole.

The sinkhole, located at the southern end of Lake Natron in the eastern part of the Dongyun continent, looks like a black hole of the earth from a satellite map, embedded in the surface of the earth, with a nearly perfect facet of a circle, up to 453 meters in diameter, and its shape is like a bottomless inverted cone.

Five hundred years have passed since the completion of the "sinkhole", but scientists have never lost half of their enthusiasm for exploring the sinkhole, which is the most likely place in the world to study the interior of the planet.

The star is divided into three parts by scientists under the change of seismic wave speed, the core, the mantle, and the crust, and there is an interface between the core and the mantle, the Gutenberg interface; There is also an interface between the mantle and the earth's crust called the Moho interface.

However, this kind of cognition that relies on the speed of waves is very general, because humans live on the earth's crust, the most powerful drilling can only go 15 kilometers deep into the earth, and even the Moho interface cannot be reached, and what the interior of the stellar ephemeris looks like has never been explained.

The sinkhole made it possible to explore the path, but it also had other problems.

As the depth increases, so does the pressure in the ground, and it is impossible for people to enter it in person. Acoustic detection brings back distance and composition, and it is impossible to see the shape with one's own eyes, so light has become a very important means, but scientists can only know the nearest region even if they try the light that can be used on the known spectrum, and the laser with the longest range inexplicably disappears when it passes through the Gutenberg interface.

What's even more terrifying is that such a huge underground project did not damage the local geological structure, as if the designer cleverly avoided all the unstable factors and created the wonders of the world in a way beyond rational imagination.

There are a lot of things you don't know, but you can still use them. At present, it is known that the temperature of the Gutenberg interface is about 5000 degrees, and the further down the temperature is, the higher the temperature. On the surface of the sinkhole, there are countless L-shaped pipes aimed at the bottom of the pit, and the sea water from the south enters the sinkhole through this. Liquid water becomes gaseous at high temperatures, and a small part of the water molecules are recycled by humans, most of them melt into the depths of the earth's mantle rock formations, and some of them become unfamiliar with the physical state.

Except for the seawater, Yunbang did not bring other burdens to the sinkhole. Until it was fully understood, it was the subject of countless mad scientists.

Tiankeng gives people living in coastal areas more security, so that people there can live more relaxed in their hometowns.

Later, people's awareness of environmental protection increased, and more attention was paid to the natural environment, and the marine icebergs had an increasing trend under the combined action of the sea and the sea, and the sea level also calmed their emotions. Over the past 100 years, the dam has only been used a few dozen times, and more often than not, it has been submerged in the sea water along with numerous drainage pipes, falling into a perennial slumber.

……