The architecture of the Tang Empire was quite interesting. The whole city of Chang 'an was a big square with more than a hundred small squares. Each small square was a square.
Each square had four gates in the east, west, north, and south. Each gate was in the center. The east gate and the west gate were connected by a street, and so were the south gate and the north gate. In this way, the inside of each square formed a cross street, which divided the area of the square into four small squares.
Similarly, the four small squares that were equally divided by the cross streets would once again use smaller cross streets to divide the area of a quarter square into small squares that were one-sixteenth of a square.
The width of the cross street in the square was narrower than that of the main road outside, and the width of the small cross street was even smaller. Generally, the width of a cross street was 15 meters, which was equivalent to the width of a two-way four-lane road in the future. It could be said that it was very wide. However, the width of a small cross street was only about five or six meters, which was relatively narrow. After all, the cross street was the main traffic artery in the square, and the traffic pressure of the small cross street was much smaller.
However, even if the cross street was divided into one-sixteenth square, it was still a very large area. For example, the most famous Ping Kang Square was a giant with a length of more than 200 meters and a width of more than 100 meters.
Many aristocratic houses occupied such a large area, such as Gao Xianzhi's house, Yang Yurou's house, and so on. Yang Guozhong's house was even more excessive. His house occupied two one-sixteenth squares, which was one-eighth of the area of Xuanyang Square.
Madam Han and Madam Qin were much more low-key. Their houses were only one-sixteenth of the area. From one-eighth, one-sixteenth, and one-sixty-fourth of the area, it could be seen that their status was different.
No matter which era it was, a house that occupied five or six thousand square meters, two or three thousand square meters, or even seven or eight hundred square meters, could be regarded as a mansion.
In other words, Madam Qin's house, which occupied one-sixty-fourth of the area of Xuanyang Square, was ten times the size of an ordinary person's house. It was not small.
Each square was divided into 16 squares, which was a basic unit. In this area of more than 200 meters in length and 100 meters in width, there were 40 to 50 houses neatly distributed. For the convenience of walking, there were even smaller alleys in this small area. There were two alleys in the east, west, north, and south respectively. The distance between these four alleys was even narrower. They were only two to three meters wide, which was only enough to accommodate one car.
The prosperous area of Ping Kang Square happened to be around such alleys. The roads here were very narrow, and the small cross street with a width of five or six meters and a cross street with a width of 15 meters were all at the edge of the area.
Due to the limited space in the courtyards of brothels and restaurants, many customers who came to spend money had no way to park their vehicles. Regardless of whether it was a new car or an old-fashioned horse carriage, there was no way to park. Helpless, they could only park at the edge of the crossroads, or even at the small crossroads that were not very wide to begin with. This further caused a very serious congestion.
But if they did not come by car, how could they show the status and identity of the aristocrats and the rich? That would be too embarrassing.
Even in the future, many young people would not be happy without a car. As long as a man did not have a car, he would not even be able to find a girlfriend. It could be seen how vain people were.
The alleys were only two or three meters wide. It was not realistic to build an underground parking garage under it, and it could not park the cars normally. The small cross street with a width of five or six meters was feasible to build an underground parking garage. As for the cross street with a width of 15 meters, it was possible to build an even bigger underground parking garage.
According to Ang Lee's prediction, a longer cross street could only accommodate forty to fifty parking spaces, and a shorter cross street could only accommodate more than twenty parking spaces. If it was a horse carriage, it could park more, but it was estimated that it could only accommodate twice as many parking spaces.
As for the wider cross street, it could accommodate more parking spaces. A width of 15 meters could park three rows of cars, leaving two rows of empty spaces in the middle. If the cars were two meters wide, then the east and west streets of Ping Kang Square could each park more than 750 parking spaces. The south and north streets were only about 100 meters long, and there were fewer cars parked there. Each of them could park more than 300 parking spaces. If the entire cross street was completed, it could park more than 2,000 cars.
Even if the narrow cross street was completed, it could only park 150 cars. The difference was more than ten times.
Because there was no precedent in the Tang Empire to build an underground parking garage, it was impossible to build all the cross streets of Ping Kang Square. They could only try to build two selectively. If the effect was really good, it would not be too late to popularize it on a large scale.
Looking at the building drawings of Ping Kang Square, Ang Lee immediately chose a location, which was the north and east streets of the cross street of Ping Kang Square. The area surrounded by these two streets was the most prosperous area in the entire Ping Kang Square. There were a lot of brothels, brothels, and restaurants here. The daily flow of people was also very large, so the parking requirements were relatively high.
However, with the wall of the square being knocked down, the streets outside were wider. If an underground parking garage was built under the main road outside, it was estimated that it would not be a problem to park more than 1,000 cars in a short section of 500 meters.
But the problem was that there was no precedent in the Tang Empire to do such a big project in the cross street of Ping Kang Square. The impact was already very big. If the main road outside was also damaged, the resistance would be greater.
Even if the north and east streets of Ping Kang Square collapsed, it would only affect Ping Kang Square. If the main road outside collapsed, it would affect a large area of the capital. Even if the imperial court supported the construction of the underground parking garage, they had to consider this problem. No one could be 100% sure that the construction of the underground parking garage would be successful.
Since the location had been chosen, the next work was to design the drawings. Building an underground parking garage was not difficult for the current technology of the Tang Empire. However, the design was very important. If the design was not ingenious enough, it would be relatively troublesome when it was used.
Ventilation and ventilation were the most basic requirements. Daylighting also had to be slightly considered. In addition, it had to be convenient. There had to be multiple entrances and exits, but there could not be too many of them. Otherwise, too much space would be taken up, and the capacity of the underground parking garage would be reduced.
Whether it was ventilation or ventilation, it would take up the space on the ground. In other words, while building the underground parking garage, the space on the ground also needed to be used to a certain extent, so that the road on the ground would be narrower than before.
A fifteen-meter-wide passage was too wide. In fact, a ten-meter-wide passage was enough. A distance of 2.5 meters on both sides could be used to build daylighting and ventilation facilities.
However, because the ventilation and lighting facilities were far apart, the space in the middle could be used for temporary parking. These facilities were not very large and would certainly not take up 2.5 meters of width. In this way, a sidewalk could be formed on the outside, allowing pedestrians to pass freely, so that the safety of pedestrians could be better ensured.
Ang Lee drew the drawings bit by bit for ventilation, lighting, and exits. He drew almost all the details on the drawings. Any small detail must be paid attention to, which was related to the success or failure of the construction.
Ang Lee spent a long time and finally drew the construction drawings of Ping Kang Fang North Street and Dong Street. A lot of technical details and the requirements of materials were marked next to them. He strived to do this project well, so that he could help Gwangbyeong Of Gojoseon smoothly obtain the status and support the current crown prince indirectly.
Although in Ang Lee's eyes, the current crown prince was a coward, the other princes were not so good. Ang Lee did not like any of them. Therefore, it was better to support the current crown prince. Moreover, Ang Lee thought that Li Yu was really good. As long as there was no turmoil in the Tang dynasty, the current crown prince might not be able to live longer than Li Longji. In this way, Li Yu could directly inherit the throne as the crown prince.
There were such examples. Zhu Biao, the crown prince of the Ming Dynasty, died too early, even earlier than Zhu Yuanzhang. Therefore, Zhu Biao's son naturally inherited the throne.
After tiring himself out for half a day, Li An put down his brush and paper and went for a stroll in the courtyard. He stretched his neck casually, trying to make himself feel more comfortable. His waist was a little sore from all the drawing.
On the other side, Li Yu had some ideas after deep thinking. However, he still did not understand many details and did not know what to do. For these problems, only Ang Lee could help him. Therefore, he had to immediately ask for Ang Lee's help.
Li Yu took the drawings he designed and hurried to Ang Lee's yard outside the city. He was going to ask Ang Lee for advice and see if Ang Lee had any better suggestions. However, he did not know that Ang Lee had already designed a better underground parking lot.
"Alang, Gwangbyeong Of Gojoseon has come to visit."
The housekeeper had returned after completing the task given by Ang Lee.
"You're back so soon. Have you done what I asked you to do?"
Ang Lee asked.
"Don't worry, Alang. I've arranged it. More than 100 craftsmen have been recruited. We can start work tomorrow."
The housekeeper replied.
Ang Lee nodded. He was very satisfied with the housekeeper's efficiency. After a pause, he said, "Gwangbyeong Of Gojoseon has come. Why don't you open the gate to welcome him?"
Although the Emperor imposed a lot of restrictions on the princes and grandsons to prevent them from colluding with foreign officials and posing a threat to the Emperor's position, the focus was on the princes. The guard against the grandsons was relatively light. After all, in the Tang Dynasty and many dynasties before it, there were not many cases where the grandsons directly succeeded the throne. Generally, the sons succeeded the throne, and occasionally, the younger brother succeeded the throne.
The contact between the grandsons and the princes was relatively small, which was even more reassuring. For example, Li Yu of Gwangbyeong Of Gojoseon and his father, the Crown Prince, only saw each other a few times a year. No one would believe that there was any conspiracy between the father and the son. If they didn't see each other or contact each other, how could there be a conspiracy? It was precisely under such circumstances that Li Yu could be more daring to approach Ang Lee without worrying about being exposed. In addition, Ang Lee was not a foreign official who had a large number of troops. He only had one or two hundred guards and no more military forces.
Soon, Li Yu appeared in front of Li An excitedly. Li An, on the other hand, was still stretching his back, looking very tired.
"What's wrong? Assistant Minister Li didn't sleep well last night?"
Li Yu saw that Ang Lee was so sleepy and asked.
"Haha! I slept very well. It's just that I woke up a little too early. Ouch! Both my eyes hurt! "
Ang Lee said as he rubbed his eyes.
Seeing Ang Lee like this, Li Yu didn't know what to say. He wanted to show his design to Ang Lee, but he knew that Ang Lee's eyes hurt badly. As such, he couldn't bring himself to say it.
"Then Assistant Minister Li, you must rest more!"
After a long time, Li Yu finally managed to squeeze out a sentence.
"It's fine, it's fine. Gwangbyeong Of Gojoseon came in such a hurry. There must be something!"
Ang Lee asked.
"It's just a small matter. Yesterday, Assistant Minister Li mentioned the underground parking garage. This Prince thought about it carefully after going back. It is indeed the only way to solve the parking problem. This is the design blueprint. Please take a look at it, Assistant Minister Li."
After saying that, he put the blueprint that he had been working on all night in front of Ang Lee.
Li An carefully looked at the design drawings drawn by Li Yu, and the corner of his mouth revealed a trace of a smile. The level of this design was really not worthy of praise. It was simply at the level of a primary school student. The ventilation was just a few bamboo poles, and the design of light transmission was completely absent. If this design was completed, it was estimated that no one would dare to go down.
"Thank you for your hard work, Lord Guangping. You've really put in a lot of effort to solve the congestion problem in Chang 'an. However, the drawing is not good enough. There's still room for improvement."
Li An said in a tactful manner.
"Is it not good? What else needs to be improved? "
Li Yu asked modestly.
Ang Lee complained in his heart. This was not a question of where to improve, it was a question of where to improve! It was nothing but a useless doodle.
"Gwangbyeong Of Gojoseon, please take a look. This is the blueprint of the underground parking garage of Ping Kang Fang North Street and East Street that I just drew. The top one is the blueprint of North Street and the bottom one is the blueprint of East Street."
Li An had no choice but to hand over the drawings he had drawn to Li Yu. He wanted Li Yu to learn from him and see how good his drawings were.
Li Yu took the blueprint from Ang Lee's hand and looked at it carefully. Although he had not learned how to draw, because Ang Lee drew a three-dimensional drawing, he could understand it completely.
After looking at the blueprint drawn by Ang Lee, Li Yu was completely convinced. He suddenly had an impulse to tear his own blueprint and swallow it. His blueprint was too embarrassing. Compared with Ang Lee's blueprint, it was nothing. It was just a baby's doodle.
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