Since the beginning of the ultra-intense study in the second semester of the third year of high school, Hetale has rarely dreamed at night, and most of the time he sleeps deeply. And the night before the college entrance examination, I don't know whether it was due to excitement or excessive nervousness, he had a long dream for the first time in a long time.

In the dream, he and Xiao Yanzhen entered a mysterious and unpredictable territory together.

In the deserted Gobi region, an old railway line spreads in the direction of sunset, with no end in sight. Next to the railway line, as far as the eye can see, there is a lonely nameless station. Under the invasion of wind and sand, it is no longer clear what it is. From a distance, the small station looks like a little chubby mound with a wide brimmed hat. To its left stood a lone flagpole, the flag on which had been torn by the wind to the point of being the only wisp left.

In the distance, the rumble of an old-fashioned steam locomotive was heard, and the earth trembled with it. Xiao Yanzhen hurriedly pulled Hei Tale and ran towards the small station. When they arrived at the platform, a dusty black train slowly stopped in front of them.

At this time, the station radio sounded, "Please get on the train as soon as possible for passengers going to Zhiyu." The train will depart in 1 minute. ”

Hei Tale and Xiao Yanzhen didn't have time to think about it, and hurriedly jumped on the train. There were only two of them in the spacious train carriage. Before they could react, the train had already started.

"It's weird! Even the conductor and the conductor were useless, and there was no one to check the tickets. Hattale said.

"Hmm. The station radio said that the destination of the train was Zhiyu, and I didn't know what it was. Xiao Yanzhen answered.

The train travels at a high speed, and the air currents it brings up a thin wall of sand on the left and right sides of the railway.

The Gobi is empty except for the desert and the occasional mound.

After a short journey, Hetale and Xiao Yanzhen finally arrived at the terminal station of the train, Zhiyu Central Station.

Zhiyu Central Station is a pure white Byzantine building with a tall circular dome. Sunlight shines through the long glass windows on the walls around the station, illuminating the central station. The huge station was empty, and a huge sign was suspended in the air in the middle of the station hall by four very thin special silk threads.

The sign reads: "Knowledge, the place where wisdom begins." It has jurisdiction over four cities: Language City, English Fort, Mathematics Town and Miscellaneous Commune. The cities are independent of each other and are not connected. Visitors can access the castles through the waterways inside the central station. See the signs at the entrance of each waterway for details. ”

Following the arrows on the sign, Hettal and Siu quickly spotted four waterways that were shooting out side by side inside the station. The entrance to each waterway is marked in detail, and the two ferries in the waterway go back and forth at regular intervals.

Hei Tale and Xiao Yanzhen, watching while walking. The four waterways correspond to each of the four cities.

Hei Tale and Xiao Yanzhen first chose the waterway on the far left that connects to the city.

They boarded a ferry docked at the entrance to the waterway. The ferry was quickly activated as if it were automatically inducted.

As the ferry leaves the Zhiyu Central Station, the waterway gradually widens, changing from a ditch to a narrow river. The two sides of the river are actually oases, willows, poplars, birches, pear trees, peach trees, all kinds of trees are high and low, and some trees also bear fruits.

Not long after, a majestic ancient Chinese city wall came into view. The city has high walls and arrow towers on the gates. I saw a man standing in front of the arrow tower, he was wearing armor, and a wisp of beard was flying in the wind. He was looking into the distance, and he was singing something in his mouth.

As the ferry drew closer, the content of the man's chanting became clearer.

"The boy doesn't know the taste of sorrow and falls in love with the floor. Fall in love with the floor. Worried about the new words. Now I know the taste of sorrow, and I want to talk about it. I want to talk about it. But the weather is cool and autumn. ”

"This is the word of Xin Qiji! Could it be that the person is Xin Qiji? It's cool and autumnal. No wonder you feel the slightest chill, it's autumn here! He suddenly woke up.

The narrow river is connected to the moat of the city. Soon, the ferry taken by Hetale and Xiao Yanzhen docked at the city gate.

The three big characters on the city gate are particularly eye-catching-Language City.

"It's really strange, why doesn't there even have officers and soldiers guarding this city gate?" Hatale whispered.

At this moment, there was a slight noise in the city. They quickened their pace, followed the sound, and walked along a wide stone path all the way to the city.

In the City of Languages, they met many writers. Many scenes from ancient poems appear here in a concentrated manner. Although the various buildings are very different, they are all scattered.

On the side of a small stone bridge, Ma Zhiyuan, one of the four masters of Yuanqu, was leading a thin old horse, standing in front of a family by the river, looking into the courtyard surrounded by wattles.

In a remote idyllic area in the city, poets Tao Yuanming and Wang Wei are sitting cross-legged on a stone couch under a crooked-necked tree, concentrating on chess.

At the door of a very pompous wine shop on the side of the street, Hei Tale and Xiao Yanzhen saw Li Bai who was very drunk, and at this moment his face was flushed, holding a wine jug in one hand, a brush in the other, and words in his mouth. Supporting Li Bai was his little fan brother Du Fu.

Bypassing a huge fake rock mountain in the middle of the city, a small locust forest is Pu Songling's residence. Pu Songling kindly invited them into the house. I saw that there were a lot of strange paintings hanging on the wall. Pu Songling said these things have inspired his story.

Walk out of Pu Songling's home. Not far away, there are two pavilions.

One is the Pavilion of King Teng, one of the four masters of the early Tang Dynasty, Wang Bo once wrote the "Preface to the Pavilion of King Teng" here, leaving the famous sentence of "Luoxia and the lonely bird fly together, and the autumn water grows together in the sky".

Not far from the Tengwang Pavilion, across the lake from it is the Yueyang Tower, one of the four famous works - the author of the "Water Margin" Shi Nai'an, once wrote the popular "Yueyang Tower" here.

In this city, there are not only ancient Chinese writers and poets, but also several foreigners.

The English dramatist William Shakespeare, the French novelist Maupassant, the playwright Chekhov, the writer Hemingway, and the Czech novelist Kafka. They sat on stone benches under the weeping willows by the lake, eating grapes, lychees, melons, fruits, pears and peaches, and other fruits, chatting about the sky and talking about the rising place, and laughing freely. When they saw Hetale and Xiao Yanzhen, everyone greeted them politely.

Everything here looks strange and harmonious.

After visiting the city, the two of them reluctantly returned to the Zhiyu Center Station.

The second time, they chose the waterway leading to Fort English next to the City of Languages.

The moment the ferry carrying them sailed out of the central station, the waterway instantly melted into darkness, and only the sound of running water could be heard, and the direction was not clear at all. And the ferry is still on the move. Hei Tale held Xiao Yanzhen's hand tightly, panting nervously, and looked around vigilantly.

I don't know how long it took, but a bright white spot of light appeared in front of the ferry, and began to get bigger and brighter. The exit of a sluice gate is just around the corner.

Soon, the ferryman carried them out of the sluice gates and back to light. The sudden light blinded the two of them for a while. When they came to their senses, a pier was in sight. On the pier is a tall wooden sign painted with the line "Welcome to Fort English!" ”。

When they stepped off the ferry, they were greeted by a medieval castle and a huge neighborhood garden. A group of people were walking in the middle of the street, led by Martin Luther King, Jr., the speaker of "I Have a Dream" and the leader of the black civil rights movement in Country M.

Following the direction of the crowd, Hettal and Xiao Yanzhen also saw London's iconic Big Ben and Tower Bridge.

At the bench on the side of the street, a man who was not tall and dressed strangely caught the attention of Hattar. Oh, my God! It was Charlie Chaplin, the "King of Comedy", who was wearing exactly what he wore from the movie "City Lights", and he was holding a small flower delicately in one hand.

Seeing that it was getting dark, they did not linger long at Fort English, and hurried home, ready to explore the next city.

The third time, they chose to go to Math Town. After the ferry's escort out of the central station, they sped along a straight underground canal, with lights on the stone walls on either side of the canal at intervals. By the light of the lights, you can see that the walls are carved with mathematical formulas, and Hattale only recognizes a small part of them.

The underground canal is connected to the interior of a hollowed-out mountain. The huge cave is lit up like daylight. I saw several old men, each holding a slender wooden bar in their hands, drawing something on the ground, and they were arguing from time to time. They were so mentally engaged that they didn't even notice the arrival of Hei Tale and Xiao Yanzhen.

"Hello old gentlemen! Is this Math Town? Hetale asked softly.

Several old men turned a deaf ear and continued their calculations.

Xiao Yanzhen asked loudly in a little anxious, "Dare to ask a few old Deng, is this a math town?" ”

"Aha! I'm sorry! I'm sorry! Just too devoted. I am Pythagoras, the discoverer of the Pythagorean theorem. These are Euclid, the founder of Euclidean geometry, Archimedes, who developed the method of calculating the surface area and volume of geometry, and Descartes, who founded analytic geometry. By the way, there is also this ancestor Chongzhi who you must be familiar with, who calculates pi to seven decimal places. Several of us are math enthusiasts. One of the old men, dressed in ancient Greek costumes, enthusiastically introduced.

Under the guidance of Pythagoras, Hetale and Xiao Yanzhen toured the entire town of mathematics. Since Math Town is located in the interior of a mountain, the place is not large and looks more like a small village. But the buildings and streets here are all about the beauty of mathematics.

After a short tour, they returned to the central station and rushed to the last city, the Miscellaneous Commune.

The ferry slowly moves along a waterway suspended in the air, and when you look down, it looks like an abyss, making people dizzy and palpitating. The waterway has been connected to a tall and majestic ancient city on a mountain peak not far away, the Miscellaneous Commune.

The Commune of Miscellaneous Studies is a huge and complex city. The city consists of a number of separate districts, each with its own distinctive character.

In the physical district, Newton, the discoverer of gravity, is holding an apple he has bitten in one hand, boasting about his great discovery to Galileo and Einstein. In the biological block, Darwin, the author of "On the Origin of Species," is mimicking the steps of a gorilla in an attempt to convince people that humans evolved from monkeys. In the chemistry block, Mendeleev, the inventor of the periodic table, is crouching in the middle of the block, drawing a huge graffiti on the periodic table. In the geographical district, the traveler Xu Xiake is trying his best to sell his "Xu Xiake's Travels" to passers-by. In the historical district, Qin Shi Huang Yingzheng is playing mahjong with Liu Bang, Tang Taizong, Li Shimin, and Ming Taizu Zhu Yuanzhang.

Happy times always go by quickly. There was a rush of radio in the air, "The last return train will depart in 5 minutes, please return passengers to the Zhiyu Center Station as soon as possible." ”

Hei Tale and Xiao Yanzhen didn't have time to say goodbye to the people, so they hurriedly boarded the ferry and returned to the central station.

The time was just right, and they happened to get on the return train 1 second before the train departed. Little by little, Zhiyu disappeared from their field of vision.......

The ticking alarm clock of "Di Di Di, Di Di Di ,......" pulls the Black Tower music out of its dreams. And the picture in the dream, like a personal experience, was deeply imprinted in the mind of Hetale.

The knowledge of the domain has visualized all the knowledge in the mind of Hetale, no longer densely packed with words and symbols in books, but into living characters and scenes, which are unforgettable.