The behind-the-scenes boss of Qunfang Pavilion is Yang Wanrong, the eldest princess of Eastern Wu, this Zhao Yingqi has known for a long time, and it is possible to come to woo himself without paying, but Zhao Yingqi is not ready to really prostitute for nothing, and he always has to give some other benefits.

Not long after, Zhao Yingqi and their carriage had arrived at the gate of Xuanfu City, Xuanfu City is located on the south bank of the Lanjiang River, close to the Lanjiang River, because it is built on a high ground on the Lanjiang River, so under the north wall of the imperial city in the north is a cliff on the Lanjiang River, which is almost more than 30 zhang high from the river.

The Lanxuan Canal is on the northwest side of Xuanfu City, standing at the highest point of Xuanfu City, you can overlook the intersection of the entire Lanjiang River and the Lanxuan Canal, and you can even see a corner of Xiaojing Lake in the distance.

Such a topography makes the military and economic status of Xuanfu City very important, Xuanbin Lake 30 miles southeast of Xuanfu City is the headquarters of Wu's naval army, once the war starts, one side faces the river, one side is by the lake, and the Xuanfu City is condescending on both sides can be said to be impregnable, easy to defend and difficult to attack.

At the same time, the water flow of the Lanxuan Canal is from north to south, and the water flow of the Lanjiang River is from west to east. Therefore, the flow of people in Xuanfu City is also the largest in the world.

Xuanfu City because of the flow of people, so the east, west and south three city walls are built with three large city gates, in terms of land occupation, Xuanfu City is almost twice the size of Yingfu City.

The layout of Xuanfu City is similar to that of Chang'an in Zhao Yingqi's previous life, and there are also sub-squares, but they are not divided by the square wall, but by the six main streets corresponding to the three horizontal and vertical city gates.

Each fang has its own unique specialized industry, and the fang closest to the imperial city in the north is equivalent to the inner city of Tongying Mansion, and most of them are the residences of dignitaries and nobles, and the closer to the south fang is, the more prosperous it is.

Moreover, in addition to the imperial city, Xuanfu City has no curfew, no horse ban, no fire ban, only no bow and crossbow, long-handled weapons are not allowed to carry the military ban, as a military, political, cultural and other functions of the national center, and at the same time as the economic center of the world, Xuanfu is more open.

This makes Zhao Yingqi like it very much, after all, people from the 21st century will not dislike to go downstairs at night to have a supper.

Although Xuanfu City can take a carriage, as soon as Zhao Yingqi and the others entered the city gate, Liu Yilin had to walk, and bluntly said that they should walk when shopping, not by car.

Sure enough, women are the same no matter where they are.

The street market in Xuanfu City is very lively, compared to Tongying Mansion on Chinese New Year's Eve, it is not much better, at this time it is just noon, Zhao Yingxi and they are walking on one of the six streets of Xuanfu City, east and west towards the Ming Street in the middle.

According to Liu Yilin's introduction to Zhao Yingqi, this Ming Street is located in the middle of the north-south direction of Xuanfu City, and in the eyes of the people of their Shen Twenty World, Xuanfu is the middle of the north-south direction of the Shen Twenty Land, so this street is just the street market where the sun rises in the east and sets in the west, and the magic is that there is indeed one day in a year, that is, the summer solstice of June 18.

Although in Zhao Yingqi's cognition, it is just because the street of Xuanfu City is built at the intersection of the Tropic of Cancer and the ecliptic, that is, the summer solstice, but in the eyes of their Xuanfu locals, this is the most powerful proof that Xuanfu is the most central, largest and richest city in the world.

However, Zhao Yingqi thought about it for a while, the winter in this world is obviously colder than that of the earth, does that mean that the yellow and red corners of this planet are bigger?

If you think about it for a long time, you might as well calculate it, since you think of it, you might as well actually calculate it, just hit the summer solstice point, don't count it, it's a bit of a waste.

Just do it, Zhao Yingqi found a stall selling paper and pencils on the side of the road, picked up the paper and pencils, and sketched them.

The stall owner immediately shouted, but fortunately, Zhao Tong followed behind him, gave the money directly, and stood behind Zhao Yingqi with Liu Yilin and watched. They were also puzzled that Zhao Yingqi would write something important.

Although Zhao Yingqi was a scumbag in his last life and had forgotten how to calculate, he still remembered the concept of the intersection of yellow and red, and it would be good to sketch the model directly on the spot, after all, it was only the content of compulsory education.

This planet is exactly 306 days a year, there has been no leap month leap day for thousands of years, 12 months, 24 solar terms, it happens to be unbelievable, so the time of the solar terms is also fixed, on the third and eighteenth days of the first month of the month, they call this wrong three, which means three days staggered with the fifteenth day of the first month.

Since he is currently standing at the summer solstice, and the planet is exactly 360 days a year, the time it takes for the sun to move from the intersection of the equator and the ecliptic, which is the vernal equinox, to the top of his head at the summer solstice is ninety days.

Zhao Yingqi was in the puzzled eyes of Zhao Tong and Liu Yilin, and drew a circle on the paper on the street stall, although the circle was a little flat, but it was not important. It's good to read the draft yourself.

Then draw an equator first, and the Tropic of Cancer, set the leftmost point of the Tropic of Cancer as the summer solstice point to connect with the center of the circle, and extend it with a dotted line, and extend the equator as well, there is an angle in the middle, this angle is the yellow and red corner, the line is not very straight, but this is not important. It's good to read the draft yourself.

Today is the third day of the second lunar month, the beginning of spring, and there are still one hundred and thirty-five days before the summer solstice, that is to say, the current direct point of the sun is still in the southern hemisphere, Zhao Yingqi drew a line through the center of the circle in the lower part of the circle, and drew a parallel line of this line, intersecting with the leftmost summer solstice point, although this line is not very straight, nor is it very parallel, but this is not important. It's good to read the draft yourself.

Assuming that the sunlight is a parallel light, the angle between the direct rays of the sunlight and the perpendicular line here should be 180/135 of the 135th of the hour, and it is almost two o'clock in the afternoon.

Now it is only necessary to wait for two quarters of an hour, that is, half an hour, and wait until the sundial on the street until four quarters of noon to measure and have the answer.

Now that he had a simple plan, Zhao Yingqi took the stall owner's stool from the side of the paper and pencil stall and sat next to the sundial and waited.

"Childe, what are you doing?" Liu Yilin asked with a puzzled face.

"There's a very important thing in the next measurement." Zhao Yingqi stared at the sundial and did not move.

"What does the gentleman need to do?" Zhao Tong leaned over and asked in a whisper, seeing that his husband was so serious, he couldn't help but become serious, so much so that he even changed his name for himself.

"Oh yes, there's exactly something you need to do." Zhao Yingqi was suddenly surprised, and hurriedly pulled Zhao Tong over.

Zhao Yingqi and Zhao Tong got together and talked to Zhao Tong about what she needed to do later, Zhao Tong found that this was the first time that Zhao Yingqi was so serious, even in the Chun Nei Dao War and the pursuit of the murderer in Tongying Mansion, he couldn't help but listen attentively.

Zhao Yingqi asked Zhao Tong to release the pen in his hand in the air with internal force, keeping the shadow as a dot and not moving, while Zhao Yingqi would draw the intersection of the shadow and the perpendicular line on the paper.

Saying that, Zhao Yingqi untied the hairband tied to the ponytail from Zhao Tong's head, pulled out a silk thread, and tied a stone underneath, and then used this thread as a vertical line.

When Zhao Tong heard Zhao Yingqi's request, he couldn't help but feel a little embarrassed, because the requirements for the control of internal force were very high.

Zhao Yingqi stared at the shadow on the sundial, and when he was only a little bit away from the fourth quarter of noon, he shouted to Zhao Tong: "It's now!" ”

Zhao Yingqi overlapped the straight lines and perpendicular lines drawn on a blank piece of paper in advance, and kept them flat vertically in the north-south direction with internal force, so that Zhao Tong could suspend the pen in the air with the external internal force, try to keep the shadow as a point, and try to get as close to the paper as possible.

The time was only a few minutes, Zhao Tong kept the pen in the air very seriously, and Zhao Yingqi also worked extremely hard to hold the paper and the perpendicular line with his left hand at the same time and ensure that it only affected the straightness of the paper but not the perpendicular line.

When the paper and pen controlled by the two people are close, the internal forces of the two affect each other, causing the paper, vertical line and pen to tremble constantly, and Zhao Yingqi's right hand holding the pen is really difficult to outline the line of sunshine.

"Xiaotong, steady!" Zhao Yingqi couldn't help but shout at Zhao Tong.

Zhao Tong had never heard his husband speak in such a serious tone, so he couldn't help frowning, biting his lips, staring at the pen in his hand motionlessly, and fine sweat on his forehead. Finally, Zhao Tong did it, the pen was parallel to the sunlight in the air, and the shadow cast on the ground was a small dot, and there were only some tremors that were so subtle that they were almost imperceptible, because of the agitation of internal forces, Zhao Tong's hair that was not tied up kept dancing behind him.

Now the pressure is on Zhao Yingqi's side, and Zhao Yingqi can't guarantee that the paper is straight without affecting the perpendicular line, or can't guarantee that the paper is straight without affecting the perpendicular line.

Zhao Yingqi also seemed to be in a daze, trying his best to ensure the internal force of his left hand, completely holding his breath, and Zhao Yingqi's ponytail also fluttered behind him with the internal force.

Although Liu Yilin didn't know what Zhao Yingqi was doing, she felt that the two people in front of her were so harmonious and charming at this moment, Liu Yilin had an urge to join in, and she also wanted to have such a good relationship with Zhao Yingqi.

Finally, when the shadow on the sundial overlapped with the four o'clock in the afternoon, Zhao Yingqi made sure that his paper had remained straight and the perpendicular line was not affected, and at the same time confirmed that the shadow cast on the ground by the pen in Zhao Tong's book was almost immobile and was a minimal point, and he stretched out his right hand and drew a straight line that intersected with the perpendicular line along the pen in Zhao Tong's hand.

Well, yes, this line is fairly straight. After all, it's waiting for the strokes, of course, straight.

After the painting, Zhao Yingqi withdrew his internal force and signaled that Zhao Tong was okay.

After that, Zhao Yingqi carefully drew the vertical line of the perpendicular line, ready to use the method of thirds to calculate the intersection angle of yellow and red, and prepared to calculate the draft he had just drawn, and suddenly found that he couldn't understand the draft of his painting......

After scrapping the boss and re-reviewing it, he found his thoughts again, and quickly calculated it with the rule of thirds, and only after dividing it for the first time, he found that this is not 30 degrees?

What is the angle of the planet's yellow and red at thirty degrees?

So the Tropic of Cancer of this planet is 30 degrees north latitude, and if this planet is perfectly round, then the Arctic Circle is almost 60 degrees north latitude?

If the range in the middle of the Arctic and Antarctic Circles is regarded as the range of human activities, then this Xuanfu City is really in the middle of the north-south direction of the world to some extent?

No way? Is it such a coincidence?