The oceans in the geosphere are as vast as the oceans that used to be on the surface, and the life under the sea is more diverse, but the waters are clearer and cleaner, and there is no garbage or pollutants floating on the surface of the sea, and the ocean is as if it was back to its original state before the emergence of human beings. The "Yuan Shui" of the Heart Lake flows into three interconnected seas in the center of the earth along with the underground rivers: the Clear Ocean in the east, the Deep Blue Ocean in the west, and the Blue Sea in the north. The Aqua Atlantis have established three aquarium cities on the seabed of each of these three oceans. In fact, the city of the Aqua Atlantis is not built in the ocean of the biosphere, their city is a bit like the structure of the city of Eden, taking the Chengming City of the Clear Ocean as an example, it is divided into three parts, from bottom to top, the first part is located in the satellite city of the human settlement, the second part is located in the underwater city below the soil of the biosphere, and the third part is located in the underwater city of the ecological circle under the bottom of the clear ocean. The only difference from Eden City is that their cities are immersed in seawater, making them true Aqua Cities. The Aqua Atlantis people are like mermaids with human bodies and fish tails, they can breathe through their noses on land, and after diving into the ocean, they use the three-petal gills that grow on both sides of their necks to breathe underwater, swim freely in the sea, and use sonar to communicate with each other, they also understand the official language of the Earth Ark, and they are responsible for the maintenance and protection of all water circulation systems in the Earth Ark.

Doug, the guardian of the biosphere, and the guide Hai Senmei of Atlantis, together with the messengers Li Xinying and Anqi, as well as the representatives of the alien race, Peter, the Zerg Drow, and the Virgil Goria, a group of 7 people took a submarine into the depths of the sea in the center of the clear ocean, preparing to go to the underwater city of the clear ocean. The submarine sails in shallow waters, full of colorful corals and bright and dazzling schools of tropical fish along the way, under the water is a lively and vibrant world, as the submarine dives into the deep water, into a green algae world, many whales that grow to 10 meters or longer are interspersed in the algae, curiously approaching the submarine, on the submarine the Atlantis Hai Senmei soaked his fish tail in a large glass tank, and sang sharply, his song was transmitted to the water in the form of sonar, As if the whale understood the meaning of the song, it gradually swam away from the submarine, and only one of the smaller whales walked in front of the submarine, as if to show them the way. The Atlantean Hasenmi smiled and said to Doug, the ecosphere guardian who was driving the submarine, "The whale seems to want to show you the way, and if you follow him, you can reach Chengming Underwater City." Our priests have understood your purpose and will be able to answer your questions smoothly."

Govia of the Virgilant asked disapprehantly, "These lower races that live in the water, they can't even survive in the air without the sea, are they really entrusted by the gods to record the oracles?"

The heart messenger Li Xinying cleverly did not pass on these words to the Atlantis native Hai Senmei, and only said that she was praising the beauty of the seabed. But Angel unceremoniously said to Govia: "The Aqua Atlanteans have guarded the gateway of mankind to the inner world for generations, and they have long been the messengers closest to God and carry out God's will in the human race, and they are the most effective in using "Yuan Shui" to promote their own evolution among all human beings, and they are the true chosen nobles of God. They are more perfect than some races that are big and undeserved."

Govia of the Virgilant Clan blushed angrily and said angrily, "Our genetic improvement technology is beyond all the humans in your Earth Ark, and can truly adapt to the high radiation and extreme environment in the universe and survive, we are more perfect than all the earth races."

Angel smiled, "I'm just saying that a certain clan is big and inadequate, and it still needs to consume a lot of "Yuan Water" to survive, but I'm not making fun of you Murress Giants! You don't want to sit in the right seat, okay?"

The Atlantean Hai Senmei said briskly, "Arrived at the Underwater City of the Clear Ocean, you look down, that disc-shaped base is the Underwater City!"

The submarine landed on top of a small disc above the disc-shaped base, and the small disc supporting the submarine slowly descended, and Li Xinying led a group of 6 people to put on diving suits and carry artificial gills that can breathe on the bottom of the sea, walked out of the submarine, and were led into the Chengmingyang underwater city by the Atlantean Hai Senmei. The appearance of Haichengming Underwater City looks like an alien disc base, but when you walk inside, it is an ancient Greek-style building, Li Xinying and his entourage entered the reception hall, only to see 12 tall stone pillars carved into mermaid portraits, supporting the tall ceiling with a marine ecological mural painted and glowing with pearl light, only to see an old man wearing a blue intimate dress with a silver coral pattern, swinging a dark green fishtail, swimming to them, and introducing himself: "Hello, I am the current priest of the Atlantis tribe, Sea Coral, and you have come here to watch the Oracle Stone, which records the arrival of the oracle triggered by the mother of mankind "Liujin" about 10,003 years ago, after the oracle came, the human beings of all races on the earth heard the voice and instructions of God in their minds, so the races of the earth united to enter the inner world according to the oracle, and work together to build a peaceful and easy earth ark."

At this time, the teleporters Li Xinying and Angel use the newly developed telepathic amplifier to telepathically connect with the priest Sea Sango, and the robot Peter, the Zerg Drow and the Virgen Golem Govia to form a telepathic communication circle, in which everyone can communicate and communicate with each other telepathically. Priest Sea Coral led them through a long walkway, three lifts, and finally to the temple of Poseidon the Sea Emperor. The temple is a rectangular building flanked by glass walls that can see through the sea world outside, and the middle walkway is covered with a red gold-rimmed carpet, and on each side of the walkway, 12 white marble columns of the ancient Greek style stand on each side, in front of which is a giant statue of the god Poseidon, and below the statue is a rectangular altar carved with sea creatures.

Priest Sea Coral tells the story of 10,000 years ago when humans were instructed by the oracle to get the key to the inner world. He said: "In the ancient times of the surface world, we of the Atlantis originally lived on a continent in the Atlantic. During the devastating Flood, our entire continent slowly sank into the ocean, and our ancestors were instructed by the oracle to obtain the technology to refine the "Yuan Shui" to promote the evolution of bodily functions. When our civilization sank to the bottom of the sea, we were able to use the "Yuan Shui" to evolve a mermaid body drive that could adapt to life under the sea, and survive the Great Flood to become the overlord of the surface world and oceans. As for the evolutionary we, the individual has a lifespan of 1,000 years, but the fertility rate is very low, it takes hundreds of years to give birth to an offspring, and the growth period of the offspring is also very long, it takes at least 300 years to officially become an adult. Although it has a high-tech civilization that is more advanced than the surface humans, due to the small population of our race, we can only live in seclusion in the depths of the ocean, silently guarding the entrance to the geocentric country in the north and south poles of the earth according to the will of God, and avoiding the disturbance of the surface humans. But in order to obtain information from surface humans, we have invented devices that can disguise themselves as surface humans and then listen to the news on the surface. As long as we put on this instrument, due to the brainwave interference of the instrument, in the eyes of the surface human beings, we are a normal human in a wheelchair, our ancestors set up a coffee company in the surface society, do not be surprised, our ancestors were rich in coffee beans before the continent on the Atlantic Ocean sank, and we have a long history of brewing coffee. Because of the establishment of the coffee brewing company, the branches are all over the world, allowing us to understand the dynamics of human society in the surface world. Unfortunately, we have found that human economic activities and extravagant lifestyles are polluting the environment, and the ocean has become a dump for land-based garbage, and plastic waste and microplastic particles have flooded the ocean, claiming the lives of a large number of fish. The emission of greenhouse gases by human beings on the earth, under the greenhouse effect, the warming of seawater, directly leads to a large number of bleaching and death of corals, and after warming, algae grow in large quantities, reducing the oxygen content in seawater. The development of nuclear energy and nuclear weapons has prompted mankind to use nuclear weapons in World War III, and nuclear waste has further polluted the oceans, and the surface world is coming to an end."

Angel asked, curiously, "So you Atlantis have opened the Inner Earth to surface humans?" that the human race on the surface may not perish?"

Priest Sea Coral shook his head and said, "It's not that simple. Because we have been instructed by God that only when the oracle comes and the whites, blacks, yellows, and water Atlanteans on our surface can unite and harmonize, can the door to the kingdom of the heart of the earth be opened, and the desperate human race can be given a chance to be reborn. Since ancient times, from our ancestors, there has been this reminder to open the door to the country in the center of the earth: "The ten stars are connected to the key day, the moon is full of joy, and the four tribes are harmonious and the oracle is coming, and you can finally live in a desperate place." “」

Li Xinying said in surprise, "The sentences you stated are very similar to the ones we got from the alien race and the land of the bamboo forest. The sentence we get is, "On the key day when the ten stars are connected, the four joys above the distant stars are raised, and the four tribes are in harmony with the oracle, and finally they can survive in a desperate place." Our prophetic sentence, except for the second sentence, "above the distant stars" becomes "above the moon," is basically the same. It's amazing!"

Priest Sea Coral nodded, "Please go to the altar, this is the Oracle Stone, according to legend, it records the process of the Mother of Mankind "Flowing Gold" triggering the arrival of the oracle, you only need to touch it lightly with your fingers, if you are a person approved by the Oracle Stone, you can see and hear in your mind the whole process of the oracle coming about 10,000 years ago. You guys can give it a try. I tried, but unfortunately nothing happened to the Oracle Stone, and I don't know if the legend is true or not."

When Li Xinying, Angel, Robot Peter, Zerg Drow, and Govia of the Virgil Clan touched the Oracle Stone with their fingertips, they saw and heard in their minds the whole process of the oracle coming triggered by the Mother of Humanity, "Flowing Gold". They heard the "Flowing Gold", the mother of mankind with long black hair and cream-yellow skin, and explained softly: "The ten stars should be connected to Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune, and Planet X, not only nine, not ten! Am I wrong? By the way, there is also the sun, nine stars plus the sun, it is ten stars. The critical day is the time of the ten stars. Above the moon, it is supposed to be a newly discovered black pyramid on the back of the moon, which is engraved with the mark of ten stars, and the four tribes are supposed to refer to the whites, blacks, yellows, and water tribes of the Atlanteans, and the four music is derived from the four tribes, and the four music represents the harmony of the four tribes. How do you find these four key songs? Yes, I also have this lyre from Atlantis, which has four gems on the front, red, yellow, blue, and green, but each gem is dusty and gray, and if each gem represents a song of the four tribes, will the gem shine if I find it?"

The picture changed instantly, only to see the mother of mankind "Liujin" to the moon on a spaceship, she held the palm-sized golden poem, the four gems on the poem, she put on a spacesuit and came to the black pyramid above the moon, only to see that the black pyramid has a sign engraved with ten stars from the bottom to the top to form a line, and the sun is at the bottom of the pyramid, and then the other nine stars. And the closest to the top is Planet X, and now except for Planet X, the symbols of the other nine stars are shining brightly, and Liujin asks the spaceship, "How much time is there before Planet X can be connected with the other nine stars?" The pilot of the spaceship replied, "15 minutes in hand." Liujin stood in front of the Black Pyramid and waited silently for 15 minutes before seeing the symbol of Planet X on the Black Pyramid also glow. At this time, the golden Shiqin in Liujin's hand automatically flew above the black pyramid X planet sign, inlaid on the black pyramid, and then the spacecraft played the first music, although there is no atmosphere on the moon, theoretically the music can not be widely spread, but the red gem in the poetry and qin emitted a red flash, the second, third and fourth pieces of music were broadcast one after another, the front of the poetry has red, yellow, blue, green four gems of the four-color flash synthesized into a white light, and then, buzz, the oracle came! Li Xinying and the other five people resounded with the voice of the oracle from the depths of their hearts, and they directly sensed the word of God......

When the five of them came to their senses, the Oracle Stone cracked through the middle, revealing a palm-sized golden lyre. Now these five people clearly understand their mission, first of all, to find the song of the four races, including the ancient inheritance song from the four races of earth humans, the Virgiles, the zerg, and the robots. Peter the Robot makes it clear that there is indeed a black pyramid on the third moon of Planet X, where he should wait for the Ten Stars to come and trigger the arrival of the oracle with four pieces of music. However, there is not much time, and the ten-star alignment astronomical phenomenon occurs once in about 10,000 years, and will appear again on June 21, three years later, as soon as Earth time, and only lasts for about 10 hours. In other words, the representatives of the four clans have only about 3 and a half years to look for the song of the four clans that triggers the oracle.