"Today we're going to do a demo, which is a little bit different from the previous models, but it's similar to a lot of things that we see in our daily lives."

The school in Linzhang Mountain is very different now. Although there is no open enrollment, whether it is a second-rate family directly affiliated to or Chang'an, or even a clan power like Li Daozong, they also sent "family sons" or clan relatives within the five suits to study.

It is the gift of "teaching teachers", and there are doctors and assistant teachers like Guozijian.

It can be said that in the past, if Zhang De did this, he would only need a small official at the city gate to carry him away. Now that he is the governor of a state, and there are people who are sloppy in the open and secret, and he is not in Chang'an, he is naturally fine.

"Watch me demonstrate."

Four glass piston barrels, distinguished by color labels. Eucommia gum acts as a hinge that connects the slender glass tube to the piston barrel. In the tube, you can see different colors of liquid, and at the end, there is a bucket.

This is a fairly simple model of an excavator, Zhang De pressed down a piston handle, the black liquid flowed, and soon the bucket made a digging action, digging up a plate of fine sand.

Then another piston of red liquid was pressed, and the wall pressing action occurred.

Turning the model, the fine sand in the bucket is lowered and falls on another plate.

"What do you see? What comes to mind? ”

After Zhang De did all this, he looked at the big and small heads, some curious, some surprised, and some puzzled.

Soon, they gave an answer.

"Sir, but it's the same as 'pump', it's still a relationship of pressure?"

"Yes."

"If it is enlarged, it can be used to dig ditches."

"Not bad."

"But sir, if you zoom in, I'm afraid you can't use glass. But with an iron piston, how can a man press such a large force? If you use the 'Linzhang machine', it is huge, and it is inconvenient, and you can dig two or three zhang square circles at most. ”

"Yes, what we have to do is how to make the 'Linzhang machine' smaller. Yongxing Coal Mine also made a machine, they called it 'Elephant Car', which is larger than 'Linzhang Machine'. Now the piston is huge and inefficient, and if the piston is smaller and the efficiency is higher, then the machine can be downsized. What we need to do in the future is how to make them stronger, longer, and stronger. ”

After that, Zhang De ordered Zhang Songbai to send down the mimeographed handouts, "Today's handouts are mainly about pressure pressure, and some of the later topics are about gear gradient lines. ”

"Yes, sir."

This year, there are already twenty or thirty qualified teaching assistants, but more than half of them have been poached by "high salaries". Shandong's "private school" attaches great importance to it, and the usual discipline of the teacher can't impress them at all. This is the same as the situation of the arithmetic students in the lecture hall at the beginning, the ordinary counter to invite, with the usual year's end, is already pleased.

Instead of being an account office, why not serve one or two powerful people in Chang'an, starting from the planner, you can be in the Ministry of Civil Affairs in more than a year, and you can be released with Shangguan in two years. No matter where the upper, middle and lower counties are, the treasury officials are always the officials' own people, and then they go to other places to be the main book, have money and outlets, and go to the "Detention Prefecture" of previous years to mix with the county order, and directly whitewash the original official background.

This speed of promotion is quite rapid among lower-level bureaucrats, and it is beyond the imagination of traditional civil officials. This is also a reality that makes civil officials helpless, Wen Yanbo found out about the problem back then, but he died.

However, this kind of promotion, at the top, is a county order, and if you want to be promoted, it is completely impossible.

For example, in Liaodong, there was even a seventeen or eighteen-year-old county order to which the "Detention Prefecture" belonged. This kind of county order is often a student of Wang Xiaotong, and then at the age of eighteen he made a county order, and there are hundreds of Hanhu households in the "city". Their main occupation is often to go out during the day to farm, hunt, and work...... Robbery, then night, return to the city to sleep.

This is the case in Liaodong, Hedong, Hebei, Shandong, and Huainan, most of them.

As a few years ago, there was always only one Ma Zhou.

"Hello sir."

"Hmm."

"Hello ...... sir"

Out of the lecture hall, all the way down the corridor, the students are respectfully saluting, Zhang De is nodding in return, the ceremony can not be abolished, but in Linzhang Mountain is never complicated. Even Professor Buzhi, who came from Beijing China, felt that it was more relaxed.

After walking all the way, Zhang Songbai said softly: "Lang Jun, the single boat owner is really difficult right now. It's not that he is the only one who says this, that is, he is from Changzhou, and now he has passed Runzhou, and Runzhou also has to collect a lump sum of money. There are many effective imitations along the Yangtze River in Huainan, and I heard that the imperial court acquiesced in such acts. ”

"It's not that I don't know the news."

This year's Zhang De is already half a head taller than Zhang Songbai, and he seems to be getting older and older. With two thick arms, no one can see that this is the patriarch of a prestigious clan, let alone the fame of Chang'an.

"Just ......"

After being silent for a while, Zhang De was not very easy to tell Zhang Songbai about the doorway.

In fact, this kind of "toll" is not because the imperial court does not want to stop it, but because the person who promotes it is the emperor. In what name is the emperor? One is the birthday at the end of the thirteenth year of Zhenguan; Second, the emperor wants to repair the palace room in Dunhuang......

The emperor was born in December, but last year he was actually forty years old, but he didn't, and he had to live at the age of forty-one.

As for the operation, Emperor Li, who is now wealthy, has no intention of "saving" at all. Luoyang Palace, Taiyuan Palace, and Jiucheng Palace have all been repaired, what are you afraid of?

But obviously, Li Dong's extravagance and waste, can it be only extravagance and waste? He is not Yang Guang.

Extravagance and waste that can't just be extravagant is a waste of the emperor's money. With a small look, traditional civil officials naturally worked hard to curry favor with the emperor in order to curry favor with him.

This kind of roadblock and card official collection of "tolls" is naturally put on the bill. The first is to be able to tie up with the emperor, the second is to be able to handle the already aggressive business groups and landowners, and the third is that you can't do it yourself without fishing, and when you go home, you will save thousands of acres of fertile land and wait for death, right?

The times are different, 10,000 acres of fertile land can live without a fake, and if you can't afford porcelain, you can't afford glass, so it's a bird? It is better not to have a "poetry and book heirloom" who has to be careful to eat a bite of sorbet in summer.

But Zhang De knew, and even Li Daozong knew that the emperor was deliberately embarrassing the "new upstarts" and "new Shandong people" and "Jiangnan people".

To give or not to give, it is all to be solved and discussed.

As for the Dunhuang palace repair room, it is naturally not just a "palace" to look at there. It is probably to be made into a fortress fortress on the front line of the Western Regions, and it is more likely to follow Huaiyuan and become a material transfer center.

At present, the core of the Hetao area is the Dahe Workshop, which is Huaiyuan. Emperor Li, on the other hand, wanted to make Dunhuang a place like Huaiyuan.

The only difference is that Huaiyuan relies on money, while Emperor Li plays with administrative orders and follows his words.

"Envoy, news has come from Chang'an."

A sweaty man in a strong suit wiped the beads of sweat from his forehead and took out a wax-sealed bamboo tube.