Datang first village

There is no straight road from Xiazhou to Lanzhou, but the road is not bad.Ten days later, Li Yuanxing arrived in Lanzhou.But instead of entering the city, he went straight west and turned south after ten kilometers.Go in the direction of Hezhou.

The Lanzhou defender followed the team with [-] soldiers and horses, and notified all the troops in Lanzhou to be on alert and ready to fight at any time.

Hezhou is an important border town, a small branch of the Silk Road.

But Hezhou is less than twenty miles away from Tuyuhun.

"Report, Great Tang Qinwang Banner, Great Tang Qinwang Banner!" A small school stumbled all the way into the tent of the chief general of the Tuyuhun Dagu Mountain garrison.

"What did you say?" General Dagushan didn't understand.

"Great Tang, King Qin of Great Tang, that King of Qin has arrived in Hezhou."

King Qin of the Tang Dynasty!

Whether he needs to lead troops or not, he alone can bring enough pressure to the surrounding states.The unpredictable art of war is one of them. As long as King Qin of the Great Tang Dynasty is on the battlefield, the combat power of the soldiers of the Great Tang Dynasty will at least double.

"Come here, prepare generous gifts. Go to Doma City and report to His Highness the Third Prince."

Taking a deep breath, the guard of Dagushan tried his best to calm himself down. No matter what His Royal Highness King Qin of the Tang Dynasty was doing here, Tuyuhun could not be underestimated. His status was too low.If you want to pay a visit, the royal family must go in person. First, send someone to send a gift as a token of goodwill, and then wait for the reaction.

What is Li Yuanxing doing now?

He was standing in a wasteland with a map in a daze.

Li Lanshan told Li Yuanxing that the location was between Liujiaxia and Bingling Temple.And give a detailed distance.

"Giving the distance is a fart, do you still need to use a ruler to measure it here? The error once reached here is a few kilometers." Li Yuanxing cursed, then looked at the longitude and latitude measuring instrument in his hand, let alone this thing is for military use Yes, even gods can't use it. Without GPS, it is impossible to automatically book a seat.

Li Yuanxing looked around. Over the past 1000 years, the terrain will definitely change.

These mountains and these valleys do not seem to be much different.

"Li Yuanchang, take the abacus and bring a few people to prepare. I still remember the calculation method of that function taught by Goro on the road. This is the time to use it!"

No one knows what Li Yuanxing is going to do.

The personal guards were all guarding in a circle, and Cui Yingying and others were in a shed several hundred meters away.In the nearby shed, Li Yuanchang brought a few people who are good at arithmetic and have already set up a posture and prepared.

Li Yuanxing first placed a disc on the ground, which was carefully made before departure. The disc was spliced ​​together, with a diameter of eight meters.The scale used above is also calculated in centimeters in later generations.

Several craftsmen used hanging ropes to hit the pillars on the ground, and then adjusted the level of the disc.

Finally, a pillar was erected on the disc by using the principle of the hanging rope.

Without GPS, Li Yuanxing had to calculate the latitude and longitude manually, and the error of ten kilometers was terrible.But if it can be within 1000 meters, or within 100 meters, Li Yuanxing will definitely feel at ease.

The craftsmen were not slow, and finally finished the work before noon.

Li Yuanxing never left the disc, ate two rougamo for lunch, and drank a few sips of tea.

"Report, the length of the rod is the same as the length of the shadow!" Someone standing on the disc and watching the scale shouted.Li Yuanchang and several calculators under him immediately became tense, and their movements were almost the same. Everyone put the abacus in front of them, opened the white paper, and took a hard pen.Then open the correction value form given by Li Yuanxing and press it with an iron bar, waiting for the next value to appear.

Next to it is an ancient chronograph.

Li Yuanxing focused his eyes on the benchmark, and also entered the value on the theodolite in his hand.

The person reporting the count quickly reset the stopwatch that Li Yuanxing had given him, and started counting.

After a full half an hour, the count was reported again: "Report, shadow chief..."

Li Yuanxing used the time and place of later generations.However, he also played a small trick. Datang's side uses the center of the new palace in Chang'an City as the origin of longitude. It is very, very easy to convert the two. It only needs to add a small program to the computer of later generations. That's it.

The latitude and longitude of later generations calculated by Li Yuanxing.

However, Li Yuanchang and others calculated the latitude and longitude of Datang.

Take Chang'an zero point as zero degrees.

After three measurements, the machine in Li Yuanxing's hand roughly calculated the latitude and longitude of Li Yuanxing's current location.But there are also errors.

Li Yuanxing pointed a direction with the electronic compass on the machine, and Li Yuanxing drew a straight line on the ground.

"Come on, measure me twelve miles and three hundred steps." Li Yuanxing ordered.

Li Yuanchang said at this time: "The direction Sinan pointed out is good. It's just that it should be longer, thirteen miles and six hundred steps!"

Li Yuanchang was sweating nervously while calculating.

After checking the data with several other people, he determined a distance, at least very close to the position Li Yuanxing made.As for the fact that Li Yuanxing just stood there and didn't use his abacus, he wasn't surprised.Fifth brother is Xingjun, if he doesn't even have this ability, he is not Xingjun.

But Li Yuanchang was young after all.

He wanted to prove that he was talented and good enough, so he proposed to go one mile further.

Li Yuanxing smiled and nodded: "According to what Qilang said, build a new platform there, and test again at noon tomorrow."

"Yes!" Li Yuanchang was very excited.

Li Yuanxing went back to the tent to rest.However, Kinderman came to Li Yuanchang's side: "Fortunately, you are the King of Han. Did you doubt His Royal Highness King Qin's calculation just now? Or do you think you are smarter than His Highness King Qin? I understand something about today, King Qin Your Highness is just teaching you how to calculate."

Li Yuanchang was also taken aback, he understood what Kinderman meant, and rushed to stand out in front of King Qin.This is disrespectful.

However, after thinking for a while, Li Yuanchang was not afraid: "Fifth brother is kind, he doesn't care about such small things!"

"Do you know that this is for calculation?" Kinderman asked again.

"This calculation? Brother Wu gave a numerical value and a method of calculation. He said he wanted to find this place?" Li Yuanchang had never been involved in politics, and he knew most about calligraphy and painting.

Kinderman smiled indifferently: "If there are more people in Datang who are proficient in this kind of calculation, the military maps of Datang will be accurate to within ten steps. You can ask the generals how convenient they are for fighting. .”

After Li Yuanchang heard about it, he ran to Lu Maofeng.

After questioning, Lu Maofeng said: "This calculation is very troublesome. But if you don't consider the accuracy, you can just set up a pole and use a rope to measure the length. The route of the field march can be done without a guide. Can be graded as precise."

Lu Maofeng thought that His Highness King Qin was looking for a location within ten steps.

It is possible to march and fight, and it is already extremely accurate within ten miles.

The next day, it was still the same, calculating the position on the disc.Li Yuanxing didn't know that Li Yuanchang's calculation was wrong, because there must be some errors in the change of latitude and longitude between modern times and Tang Dynasty.It was only a few hundred meters, which already made Li Yuanxing very happy.In the future, Li Yuanchang may be Datang's first director of the map bureau.

Another few hours of busy work.Only this time, Li Yuanxing was more concerned with watching, and the main job was Li Yuanchang leading people.

Li Yuanxing looked at the machine in his hand, and then at Li Yuanchang gesturing to Sinan.

"Fifth brother, go southeast for another five miles and two hundred steps. It should be almost at the location that fifth brother said. Our calculation is correct, but the angle of Sinan seems to be inaccurate. It's a pity that none of them can be accurate to a thousand One-tenth of it. This one is a little short, and ten miles away is half a mile away!"

Li Yuanxing is very satisfied with Li Yuanchang's statement.

Li Yuanxing originally thought that it would take ten days and a half a month to find the location, but now he underestimated the strength of the soldiers of the Tang Dynasty and paved the way, so there was no place Li Yuanxing could not reach.It's just that Li Yuanxing's gorgeous carriage remained in Hezhou City. It was too big to enter the mountains or valleys.

On the third day, Li Yuanchang led people to continue to calculate.

Yan Shigu then asked: "Your Highness, what are you looking for?"

"Look for bones!" Li Yuanxing turned around with a smile, Yan Shigu shook his head: "I don't believe you, Your Highness mobilizes the crowd. Moreover, it is only a few dozen miles away from Tuyuhun, Your Highness must really look for bones when you come here. What kind of bones are the best?" Is it worth His Highness coming here in person?"

"Just wait and see, you will understand when the time comes." Li Yuanxing still didn't say clearly, because he didn't know if he could dig it out.

Cui Yingying was also curious. He asked, but Li Yuanxing refused to say anything.

"Fifth brother, 800 meters to the east is the location that fifth brother said." Li Yuanchang ran over excitedly. Li Yuanxing looked at the instrument in his hand and found that the calculated position was similar. It can be said that the error is within one kilometer.

Li Yuanxing took a deep breath: "Lu Maofeng, send the order."

"Here!" Lu Maofeng shouted, and everyone around him, whether it was generals, captains, sergeants, or craftsmen and servants, straightened their bodies. After running so far, they didn't know what His Royal Highness King Qin was going to do. How can this not be exciting.

"The cavalry guards the outside, and no one within a range of [-] miles is allowed to approach. The Habayashi guard guards the inner circle, and those who trespass will be cut off. All soldiers and auxiliary soldiers, except for necessary food and medical treatment. Take off the armor and start digging. No one is allowed to use detonators without the king's permission, and all work must be done by hand. Once you see bones, or similar bones, you must report to the king immediately, and remember not to damage any bones!"

Bones, dig bones?What kind of bones to dig?

Everyone was stunned. They ran thousands of miles and spent so much effort to dig bones.

It can be said that if Li Yuanxing hadn't personally ordered it, some officers would have come to ask why.