Yang Qiao always felt that recently, there seemed to be something he hadn't done.

"Instructor, what new invention is this?"

"You guys, you're out shopping again, have you taken a leave of absence?"

Well, when I think about it, there is really something that has not been done, that is, there is no follow-up development in the matter of the military school.

"By the way, you guys, what are you doing now, if it involves secrets, don't tell me!"

"There is no secret, everyone knows, now, we are giving rotation training to various teams, and even, some teams that have just finished fighting have to participate in training, and since that battle, our worst has also been promoted by one level, a whole level."

These people are relatively low-level, so when it comes to promotion, they are very happy, in fact, their generals are even happier, they have entered the noble class, at least, Li Jing can look at them squarely.

"Alright, let's go shopping."

Yang Qiao waved his hand and let them go, it seems that Li Er still needs to see the effect, this, really can't be in a hurry.

Thinking of Li Er, someone came to call him.

"Yang Langjun, you are here, let the slave family be easy to find."

Who did you learn this from, and if you don't have one thing, you will become a slave?

"What's the matter, that father-in-law?"

"The saint is invited, but you are playing with the little lady now, so, the slave family is in charge of the saint, you can enter the palace again tomorrow, the saint is not too anxious."

"Then thank you to the father-in-law, but on me."

"Ah, don't dare, don't dare, Yang Langjun, then, the slave family has retired."

What you decide, it must be Li Er's words, it is estimated that Li Er also knows that Yang Qiao is playing with the child, so he just asked him to inform Yang Qiao that he will enter the palace tomorrow.

…………

"Holy?"

"Well, you're here, I'll go straight to the topic, I heard, you've been busy lately, and, I heard that you have a new toy, when, give me one, okay, don't talk nonsense, I'm going to start measuring now, and design a double road, that is, to draw drawings."

In the past, this resumption was still in fantasy, but at this time, this resumption is officially about to fall on paper, and it is also recently, Li Er has collected more taxes, so he has confidence, this, not including the sale of salt.

If the salt tax is also included, this tax will increase a lot, you know, in the later generations of the braid dynasty, the salt tax is the main source of tax revenue!

"Holy Lord, I can't help with this, can I?"

"I didn't say that you would help, I just thought that if you have any good suggestions, you can put them forward, and even, you can participate in the construction of this drawing."

Well, this is not helping, but in order to say something nice, besides, now, the main rivers that pass through the streets in Chang'an City have been replaced with wooden arch bridges, and every river that passes through the streets, this intersection, there are more than one bridge, but several, and the most prosperous is the bridges at both ends of these bridge groups, every day, there are some women with veils on it, watching the boats under the bridge to watch the excitement.

Even, under the bridge, there are some old men, fishing, this is what Yang Qiao did not expect, because this is a bridge pier, which is directly inserted in the water, and the top is still very smooth, and the area is not small, it was discovered by these old men, it is definitely a good place for fishing, the wind can't blow, the rain can't get wet, and even, the sun can't shine.

"Fu Dao, I don't have any suggestions, this, it should all be a draft, hey, by the way, Shengshang, do you know what Chi Dao is?"

Suddenly, Yang Qiao remembered this matter, you must know that Li Er has read a lot of miscellaneous books, and Yang Qiao, on the contrary, is a little lonely and unheard of about these miscellaneous books, but it is only lonely and unheard of compared to the palace.

"Chi Dao, isn't it just a road that can travel quickly, this is a title that only existed in Qin Shi, how?"

Li Er wondered very much, this Yang Qiao was actually interested in Chi Dao, but why was he interested in this?

Yang Qiao felt disappointed, this, Li Er didn't know, this Qin thing, in this era, I didn't know, in fact, either I didn't know at this time, it was the Han who took Qin, and I didn't know, some things, before the end of the war, disappeared, and even, even Liu Bang, he didn't necessarily see the so-called galloping road, otherwise, there would not be no record, and there would be no real six-horse carriage.

"So, Holy Lord, how do you understand the difference between a straight road and a galloping road?"

"Straight road, isn't it the road that leads to the grassland in Xianyang, that is, the road that is being repaired now, that road, repaired, it's really good, this grass is eradicated, it doesn't need to be repaired, you can run a carriage on it and, the rut is very shallow, galloping, it should be a curved road!"

Well, this Li Er, he didn't understand the Chi Road and the straight road, that is to say, in the royal classics, there is no record, the family, let alone the family, this so-called family, it was officially recorded after the Han Dynasty, and it was developed, even if the ancestor was pushed to the era of the Yellow Emperor, it was just reasoning and legends.

"Then, Holy Master, how do you understand that Qin's car is on the same track?"

"The car is on the same track, isn't it for the carriage, or the chariot, ah, maybe you don't understand, this chariot was the main battle tool before the Qin, and after the Han Dynasty, this is rare."

Li Er also popularized Yang Qiao's knowledge.

"Hey, don't you ask, I really haven't studied it, this car is on the same track, I really can't explain it, Emperor Qin, it should be quite level-conscious, if you want to pay attention to the level, there shouldn't be a saying that the car is on the same track, there is this statement, there is no level?"

Yes, Li Er also entered the paste basin.

You know, a six-horse car, and a car pulled by an ox, if they are all the same width, then how to say, not to mention the ox tired to death, but, can't go, you think, a carriage, since there are six horses in front, whether you are four-wheeled, or two-wheeled, this width is definitely different, not to say reasonable or unreasonable, how to drive, is a problem.

"Perhaps, this is a new topic, let those ministers take a good look at it?"

This is an idea, in this era, it is okay to investigate, but Yang Qiao's idea is that if the legend of the later generations is true, then, it is better to leave that paragraph first, perhaps, the future generations will solve it according to what fourteen or sixteen, if it is false, then, now the investigation will be in vain, but at this time, Yang Qiao has a new idea.

"Holy Lord, how wide do you want to build this recovering path?"

"At least a zhang wide, this still needs to be verified."

"What about height?"

Li Er was able to answer patiently, originally, he called Yang Qiao to come just to let Yang Qiao give an idea, maybe, what good ideas does Yang Qiao have?

"Height, for safety, about two feet, right?"

Safety, this is true, because, if Li Er is walking on the compound road, then, there is no clear road below, if this compound road is short, it may really be dangerous.

"What, do you have any good advice for this repetition?"

Li Er came to be interested, looking at Yang Qiao's appearance, obviously, he had a new idea, when he first came, he didn't have an idea, but later, it was a gallop, a straight road, and a car on the same track, isn't this a new idea!

"Could it be that you have a new explanation for the car on the same track?"

"Well, yes, Shengshang, I have an immature idea, I think, since there is a huge space under this compound road, then, it is better to let me use it and do an experiment, perhaps, if I can explain this galloping road, even if it can't be explained, it will be of great benefit to our future traffic in the Tang Dynasty, and it can also allow Shengshang, on the compound road, to travel safely."

Yang Qiao, what he thinks of is natural, what he thinks about is the rail train, the rail car pulled by horses, maybe, within a year or two, it is pulled by horses, but, now, the shock absorption system of this bicycle, if it is verified to be qualified, that is, durable, then, the steam engine, maybe, will appear soon, naturally, the price of appearing, that is, thickening the furnace wall or something.