The particularity of the Tang Dynasty caused Li Xuan to attach importance to something, and the courtiers below also paid attention to something.

The steam engine is just one of them, and there are more things, all because of Li Xuan's attention, so those courtiers also pay attention to it, as for whether the matter itself is worth paying attention to, it is no longer important.

In the eyes of many people, the steam engine is not used, but it is not the same as it is highly valued.

Unlike many people who are still skeptical about the steam engine and don't understand it, the navy is very positive!

Because the navy has already seen the battleship equipped with a steam engine, it can get rid of the influence of sails, and the improvement of combat effectiveness will be huge.

But unfortunately, if the navy wants to get a steam engine, it will not be a year or two, or even a year or two, it is unlikely, because the navy needs a high-pressure steam engine, so that the volume and weight can be reduced.

And now the Royal Institute of Technology has not even developed a low-pressure steam engine, and it is still far from a high-pressure steam engine.

After inspecting the Dangtu Industrial Zone, Li Xuan continued to set off with the guards and the ministers of civil and military affairs, and at this time they were not far from Jinling City.

The holy car is about to return to the court, and Jinling City has also set off an activity to rectify the city's appearance!

The Chengtianfu Patrol Police Bureau held a pledge meeting a few days ago, preparing to dispatch a large number of patrol police forces to rectify the city's appearance and completely put an end to dirty, disorderly, and other behaviors.

A few days ago, Jinling City is to carry out a large-scale rectification activities, the streets of the comprehensive plot, and some littering, queue cutting and other uncivilized phenomena, is also focused on dealing with, usually fined one tael of silver, now directly fined five taels, ten taels.

And all new beggars and homeless people on the street will be forcibly contained!

Since the Tang Dynasty moved the capital to Jinling City, in addition to the normal rectification of the city's appearance, the Tang Dynasty also carried out a large-scale municipal engineering transformation of Jinling City, the funds, part of which came from the central finance, and part of the local finance of Chengtianfu itself, in a few years, the cumulative investment of more than 100,000 taels of silver.

Mainly for the renovation and expansion of sewers.

At the same time, the roads in the city are reconstructed on a land-based basis to increase the land-based drainage performance and avoid water accumulation on the roads!

In addition, stone slabs were laid on the main main roads in the city, especially those near the royal palace, the imperial palace, and the main office and yamen in the center of the city, and cinders were laid on some of the other secondary arteries.

Although there are not many steam engines in the Tang Dynasty today, one thing is worth noting, that is, in recent years, because of the increase in machinery and equipment, the mining cost of coal has gradually decreased, and now coal has been widely used as a household fuel.

The amount of cinder produced is also quite a lot, and Jinling City, Chengtianfu, is the first to use cinder waste to pave roads, and the effect is quite good.

The most important thing: cheap!

After paving a lot of stone roads and cinder roads, Jinling City does not dare to say that there are no dirt roads in the whole city, but the main roads have basically realized the slate and cinder roads, which has greatly improved the appearance of the city.

On weekdays, the appearance of Jinling City is quite good, and now it is strictly rectified, which makes Jinling City appear more clean and tidy.

And when they do this, they are still affected by Li Xuan's personal preference!

It's like a steam engine.

Li Xuan likes steam engines, and those courtiers attach great importance to them.

Li Xuan likes to be clean and tidy, and he hates and rejects dirty cities, so the courtiers under him also attach great importance to it, and basically every city patrol police station will have a city management office, which is responsible for the appearance of the city.

Of course, there are also many local yamen who collect fines to improve the poor local finances.

But no matter what, when Li Xuan returned to Jinling City in the grand welcome ceremony, what he saw was a clean and tidy city!

There is no such thing as paving loess and sprinkling water like in many feudal dynasties, because the main road of the city through which Li Xuan's royal car passed is a black cinder road, and the carriage walks on the road, which is very stable.

When they almost entered the center of the city and arrived at the area where the royal palace and many government yamen were located, they walked on the road paved with bluestone slabs.

Along the way, there was not a trace of dust raised!

This made Li Xuan quite satisfied!

Using cinders to pave the road is still Li Xuan's attention to the courtiers below, otherwise with their shallow knowledge, they can know that coal is so useful!

Two years ago, when they were asked to renovate the roads in Jinling City, they were crying poor every day, saying that it costs too much to pave stone roads, the tax department has no money, and there is no money in Chengtianfu, etc., Li Xuan was on fire at that time, and let you renovate the road, and you don't have to let you pave stone slabs, slate prices are expensive, you won't find a way.

Large slate must be expensive, but don't you lay small slates, these scraps must be cheaper.

And in addition to the slate, you won't use other materials, asphalt, cinder, etc.!

Asphalt, well, it's too much, but cinder is not difficult to do, and it can be reused, what a good paving material!

After Li Xuan's guidance, the officials in Jinling City tried to pave the road on a large scale with gravel slabs and cinders, otherwise, when Li Xuan traveled, it was estimated that he would have to do something like paving loess and sprinkling water!

If you really want to do this, Li Xuan feels that his face will have to be lost by them!

As a great, glorious, invincible traverser, it is already shameful enough to not even build a concrete highway now, and it is estimated that the whole starting point will be laughing at him.

But if you can't even get a cinder road, and you have to use the loess road, it is simply not a shame at the starting point, but a shame in the whole reading.

Li Xuan is a face-saving person, so he thinks that we won't do this cement, asphalt and other high-end things first, but we still have to do stone roads and cinder roads.

The carriage was walking on the cinder road, and Li Xuan barely felt any bumps!

Naturally, it's not all the work of the cinder road, but more importantly because of the springs on the carriage!

This huge carriage is Li Xuan's special car, and in order to ensure comfort, it is equipped with the most advanced technological product of the empire: springs!

And you must know that in order to keep the spring secret, the Tang Dynasty also wanted to prevent other countries or forces from obtaining springs on a large scale to make flintlock pistols, so the springs were strictly controlled.

At present, there is only one company that produces springs in Datang, that is, Jinling Special Iron and Steel Company, which is directly under the Ministry of State-owned Enterprises.

The springs produced by it are mainly supplied to the internal enterprises of the Ministry of State-owned Enterprises, and not to private enterprises!

At the same time, the spring application of the Ministry of State-owned Enterprises is currently mainly focused on industrial applications and ordnance production!

For example, where springs are used in armaments, there are not only flintlock pistols, but also military carriages, which have now been widely used by the Tang Army, and are already equipped with at least 1,000 taels of four-wheeled transport carriages, which are large-scale use of springs to ensure the bearing stability of vehicles.

In the case of industrial applications, in addition to a small number of special parts that serve as various types of equipment, a major application is still in the carriage!

However, the main customers of these civilian carriages are also the official yamen of Datang, and they are not sold to ordinary people.

Because in order to ensure that the springs were not smuggled abroad on a large scale and used to make flintlock pistols, the Tang Dynasty did not sell horse-drawn carriages with a large number of springs to the people in principle.

Of course, the reason for the principle is that there are exceptions, and horse-drawn carriages equipped with springs are naturally sold to the people, but only in small quantities, and are generally aimed at civilian enterprises and wealthy merchants, and the price is expensive.

At present, the horse-drawn carriages produced by the Jinling Carriage Company under the Ministry of State-owned Enterprises, and the mass-produced carriages with springs are basically sold for enterprises, not for private individuals, and are mainly used for industrial production such as pulling goods.

But if you have money, you can buy their high-end carriage series, these high-end products are with springs, comfortable and luxurious, and the price is not to be said, just one word: expensive!

The cheapest one in it is a single-horse pull, and even the coachman has no place to sit, so he can only control a small two-wheeled carriage controlled by himself, and the price is up to one hundred and fifty taels of silver!

And the price of a medium-sized four-wheeled carriage starts at three hundred taels of silver!

On this, there are various versions with more ornate decorations, and there is no upper limit on the price, because many rich people come to order carriages, and they are customized, and different requirements naturally have different prices.

The Tang Dynasty's control over springs is very strict, the rich don't care about buying it, anyway, there are not many, if you dismantle the luxury carriage bought for a few hundred taels, and then take out the springs inside and transform them into springs for flintlock pistols, then they will obey you.

You're rich, you're capricious!

But those ordinary carriages with springs are all purchased by enterprises, and enterprise purchases are in large quantities and have been recorded, and someone will check them regularly, there is only one principle, they don't care what happens to those carriages, but even if the carriage is destroyed, your springs must be there!

No more, so sorry, all sorts of investigations are coming.

As for exports, they are not allowed!

Before the foreign enemy developed the spring and equipped the flintlock pistol on a large scale, the Tang Dynasty would strictly control the spring, but in addition to the control, it was also appropriate to use the spring in industrial production to serve the industrial development.

However, despite all kinds of restrictions, but because of the superior shock absorption performance brought by the spring, it still makes the spring carriage a darling, and many gentry and landlords and wealthy businessmen compete to buy, for them, a few hundred taels to buy a carriage is nothing, many rich businessmen are still playing customized, and it is possible to smash out thousands of taels, or even tens of thousands of taels of silver.

Well, Chen Lifu's car is a custom-made four-wheeled carriage, which cost him more than 8,000 taels of silver, using the most expensive wood, gilding, and pearls as curtains.

All the officials in the entire Jinling City, whether they are high-ranking officials or military aristocrats, his carriage is the most expensive!