And what Tang Ping said was not to let Datang collect salt taxes now, but to let them reduce the cost of salt in order to make a profit.

Today we have refrigeration facilities to preserve food, and the ancient people's way to preserve food is pickled pickles, ancient people have a greater dependence and demand for pickles, therefore, the demand for salt is great, which is why there is a "Tang family, thirteen catties of salt per month" phenomenon.

The demand for salt has always been huge, and now the salt in Datang is mainly lake salt and well salt, and there is sea salt in Dongyue, but the price will not be lower than that of lake salt and well salt after buying.

The yield of lake salt is smaller than that of sea salt, and well salt involves the problem of digging wells.

What Tang Ping said about making money is to mine a large amount of well salt.

Of course, the small-hole drilling technology he just provided was used.

After listening to Tang Ping's words, Dai Xuan said, "Lord Tang is talking about Fuyi County in Jiannan Province, right?"

Tang Ping nodded: "That's right, it's Fuyi County."

Speaking of Fuyi County, some people may feel that it is deaf.

And if we talk about the modern name of this place, then many people know it, it is Zigong City in Sichuan.

The history of salt production in Zigong has been more than 2,000 years, and a self-flowing well and a Dagong well were finally combined to form the name of Zigong.

Not much in the Tang Dynasty, although the salt of the wells was produced here, the efficiency was not high.

The main reason is also related to the well-drilling technology and salt boiling technology at that time.

Tang Ping said: "If it can be made into new well-drilling tools, it will not be a problem for Fuyi County to increase its salt production dozens of times."

This is not an exaggeration at all, the well salt resources of Zigong are too rich.

You must know that at the end of the Anti-Japanese War, Feng Yuxiang went to Zigong to raise donations, and only 220,000 people donated 120 million legal dollars in Zigong, while the big salt merchants in Zigong personally donated 15 million legal currency, the first in the country.

From his wealth, you can see how much salt Zigong has.

According to Tang Ping's plan, if it succeeds, the cost of salt will be reduced to one-tenth of the original amount, or even lower.

Even if the retail price of salt were halved from its current price, they would still be able to make a profit.

And because of the reduction of costs, they can also snatch away all the lake salt in Tuyuhun and the sea salt business in Dongyue.

After all, Datang is one of the current salt prices

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Half of the salt is sold, and some of them make money, but if Dongyue also sells it at half the current price, then they can only lose money.

After listening, Dai Xuan looked at several craftsmen in the Ministry of Industry with burning eyes: "How many days will it take to make this tool?"

Several craftsmen of the Ministry of Engineering looked at each other and said, "It is estimated that it will take seven days!"

"Why did it take so long?" Dai Xuan said dissatisfiedly, "Aren't all the drawings of Lord Tang drawn for you?"

"Lord Shangshu, this ......," the craftsman had to explain.

Dai Xuan ignored it directly, and said to Li Shimin: "Your Majesty, this matter is imminent, it is better to do it sooner rather than later, I think we should pay money to motivate craftsmen, and if you do it one day in advance, you will be rewarded with ten bonuses."

In his opinion, such a good thing should naturally be put into use as soon as possible, not only to drill water wells, but also to drill salt wells, which is all money.

Although Li Shimin has not expanded the army, the equipment of the army has actually been improving, and Li Tai's research on the Datang Shenwei cannon also costs a lot of money.

"However, this thing needs a steam engine, and now the entire steam engine production line has produced more than a hundred units." Duan Lun put forward his own opinions.

Now their steam engines are basically handmade, and in order to use safety, quality control has been strict, so although the steam engine has been invented for a while, the production capacity has not been raised.

"This kind of drilling machine is best powered by a steam engine, but wind, water, animal and human power can all be used."

After all, the core change in technology is from gold mining in the past to drilling.

As long as the drill bit is drilled, the manpower and animal power are at most slower.

So three days later, in the gardens of the palace, several craftsmen began to build shelves.

The shelf was about the size of a large grinding disc, with a transmission rod attached to the steam engine.

Now the craftsmen of the Tang Dynasty are very handy with all kinds of transmission devices, and they have discovered under the inspiration of Tang Ping that the most labor-saving and fastest way is to use the rotating rod to guide various wind, water and other external forces to the equipment to replace manpower.

People will be tired and need to rest, water, wind and steam engines will not be tired, they don't need to rest, and their strength is greater.

Many things, as long as they are put to the plain, the truth is so simple.

Add a drill bit and connecting rod under the shelf.

Then the ignition of the work, handed

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It was given to Li Shimin.

Li Shimin is very happy, he likes this sense of ceremony now.

Soon after the ignition, the sound of the steam engine began to get louder and louder.

Then, according to Tang Ping, some craftsmen watered the place where the soil was drilled, softened the soil below, and reduced the wear and tear of the round-bladed file bit while speeding up the speed.

The drill bit was pressed by a heavy object, and the file was pressed into the dirt, and then the steam engine was finally fully activated, and the file began to spin rapidly.

And then it was visible to the naked eye, and it went into the ground.

The round-bladed file, which was more than two meters long, was lost in less than a moment.

"Add the link!" Tang Ping shouted, and immediately a craftsman went over, first disengaged the steam engine, then sent the hoop, added a connecting rod more than two meters long, and continued to drill and add water.

The soil in this garden in the palace is soft soil, and there is a well next to it, so there must be groundwater here.

As he fought, the watering craftsman shouted, "It's water, it's water."

Li Yuanji was also looking at it on the side, only thinking that this thing looked domineering and interesting, and when he heard the craftsman's words, he didn't understand: "What does it mean to go underwater?"

"There is usually an impervious layer between the groundwater and the ground, and now the water poured on it suddenly goes down, either into a hole in the ground or into an aquifer." Tang Ping explained.

The drill bit was lifted out over there, and it took less than an hour to drill a small hole with the size of a bowl.

Of course, this depth is also what it looks like.

Li Yuanji walked over and looked at it, it was a black hole, and he couldn't see anything.

"And that's it?"

"Well, we'll find out if there's any water down there."

"That's good, safe!" He still knows that if people dig the well, it will be dangerous, and this hole will be drilled so deep in a while, but it is naturally safe without people going down.

The craftsmen of the Ministry of Industry are also excited, and if it is done, there will be a bonus.

I put on all the hand-pressed wells and accessories that I had made, and I was driven away again.

Li Shimin came to press the well, and Li Yuanji added water on the side.

The whole garden could hear the creaking sound of the well, just when everyone wondered if it had failed.

The water began to flow out from the outlet on the side of the hand-pressed well.

(End of chapter)

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