Zhang Jiu and they have already transported the materials over, first of all, they set up camp tents, and these camp tents are sorted into categories on the open space, and then Zhang Jiu sent people to dig two big pits on both sides of the official road, and then erected two wooden stakes, on which a wooden board was ordered, and the big characters were written: Datang Royal River Service Area. There is small print next to it: provide meals, drinking water, horse feed, parking spaces.

Wang Tie and the others took the family as a unit, set up several camp tents, and then built their own stoves.

It took a whole day to do all this work for the time being, and Zhang Jiu and the others were about to leave.

"Wang Tie." Zhang Jiu greeted again when he left.

"Lang Jun, please speak."

"You used to have the highest military rank in this Xiaohe service area, and you have been a commander, so according to the order of His Highness, this place will be managed by you for the time being, in fact, what you do every day is what I told you before, in addition, if you are free, you can carry some small saplings to encircle the entire service area, just do it slowly."

"We will gradually send some bricks and stones, building materials, etc., when the time comes, you will have to build your own house, and the money will be deducted from the profits you earn, and after the final deduction, these buildings are your own, do you think it is feasible?" Zhang Jiu said.

"This ...... Absolutely, that is...... It's that His Highness is too good to us. Wang Tie was a little embarrassed, he really felt that he had taken too much.

"It's okay, Your Highness said, you shed blood and sweat for the country, and the country will ensure that you can't have problems in the rest of your life." Zhang Jiu smiled and spoke.

"Well, I remember, please rest assured, Your Highness, I will definitely keep this place in good condition." Wang Tie said seriously.

"Then I'll go first, and I'll send the things to build the house over tomorrow and the day after tomorrow." Zhang Jiu smiled and spoke.

In fact, it seems that the service area was established by Li Ke, but in fact, Li Ke is really not ready to make much money from the service area, to put it bluntly, what Li Ke has to do is to build a residence one by one.

The post station of the Tang Dynasty, or to be precise, the post station of all dynasties is absolutely not allowed to be used by ordinary people, only officials can use the post station, but the service area is built by relying on the post station, no one has said anything about this, and didn't you see the sign in front of the service area? Datang Royal, who has an opinion?

After these government soldiers can take care of their own profits and losses, they can buy food supplies and so on, Li Ke doesn't care, presumably they will definitely be able to make some money. Moreover, there is another advantage of stationing old government soldiers in these service areas, that is, they can be equipped with weapons in the later stage, and the combat effectiveness of these government soldiers is really not weak.

Because in the later period, Li Ke will continue to replenish the newly retired government soldiers, so that a good cycle is formed here, and each service area is like a blood transfusion artery, activating the commercial operation of the giant of Datang, and the commercial activities during the Zhenguan period are actually very sluggish.

And the old soldiers are the white blood cells in these arteries, ensuring the safety along the official road, and some bandits dare not rob along the way.

If the commercial activities of the Tang Dynasty could reach the level of the Song Dynasty and maintain the strength of the Tang Dynasty in terms of military strength, it may not be possible to call the Tang people or the Han people more than a thousand years later.

The construction of the whole Xizhou is in full swing, with the continuous implementation of Li Ke's decrees, the order of the entire Xizhou is getting smoother and smoother, and the alfalfa has also been successfully sown, according to the relevant sowing instructions obtained by Li Ke, a large Tang mu of alfalfa needs 5 catties of seeds, and Li Ke from the seed warehouse out of the alfalfa seeds totaled 15 tons, that is, 30,000 catties, a total of 6,000 acres.

According to the official information, one acre of alfalfa can raise about 15 sheep, Datang's mu is smaller, Li Ke calculates according to 10, 6,000 mu can also feed 60,000 sheep.

This is not a small number, it seems to be only a drop in the bucket compared to the huge number of sheep in Xizhou, but the original grassland in Xizhou, one acre of grassland is absolutely impossible to raise 15 sheep.

And these alfalfa will break out next year, and after all the land is planted on a large scale next year, the planting area of the entire alfalfa may be expanded dozens of times, anyway, there is no harm in planting this thing, just plant it on a large scale.

Wherever it is close to a water source, it can be planted and fertilized, even if some of the land is barren and may not grow very well, but it is still much more than the original pasture.

While Xizhou continued to prosper, in the words of later generations, the GDP was frantically rising, and various places such as Longyou Road in the Tang Dynasty finally ushered in the first wave of baptism of Chihai Salt.

In Chang'an, the first person to receive a gift was naturally Li Shimin.

Li Shimin, who got Chang Lin's report, was slightly excited, because he knew what it meant for these salts to start selling, so Li Shimin asked Chang Lin to take a jar of salt sent by Li Ke as soon as possible.

When Li Shimin saw the delicate, abnormal, fine-grained fine salt contained in the glass jar, Li Shimin's eyes almost widened, this is the finished product? Li Shimin is actually not the kind of emperor who doesn't know grains, he led troops to fight when he was young, and even made his own food.

So he naturally knows something about salt.

"How much does this salt sell for?" Li Shimin suddenly asked a key question.

"Back to Your Majesty, the price varies, there is a mall that gives the statement that His Royal Highness King Qin has specially developed a new technology for filtering impurities for His Majesty's health, and the total filtration process of these refined salts is fifteen filtration processes, which is only a single finger filtration, almost all impurities harmful to the human body have been removed, the cost price is 500 Wen a catty, the price is 550 Wen, the profit is 40 Wen, and the freight is 10 Wen a catty.

"And His Royal Highness the King of Qin stipulates that because this salt is difficult to make, it is only limited to 2 catties at a time."

Chang Lin said quickly.

Li Shimin was stunned for a moment, and when he first heard that the cost was 500 wen a catty, Li Shimin scoffed, this bastard told himself at the beginning that these salts can be directly regarded as profits, that is to say, the cost is equivalent to nothing, and labor is used as a prisoner.

At this time, when he heard the fifteen filtration processes that Chang Lin said, and heard the purchase restrictions, Li Shimin didn't dare to guarantee it.

Could it be that this bastard really developed fifteen filtration processes for himself?

"I'll taste it." Li Shimin wanted to come over, pinched a little with his fingers and sprinkled it into his mouth, a salty taste came into his mouth, there was no bitter taste in addition, and there seemed to be some faint fragrance, although it was very light, but it was indeed different from ordinary salt.

"What else?" Li Shimin asked again.

"There are also 12 filtration procedures for porcelain bottles, 10 filtration procedures for 200 Wen pottery bottles, 5 filtration procedures for 50 Wen wooden boxes, and 1.5 Wen per catty of salt without filtration procedures, but His Royal Highness King Qin said that even if 1.5 Wen per catty of salt has not undergone special filtration, a new process is also used in the production, and most of the impurities that cannot be removed by other salt on the market that are most harmful to the human body are sold at cost price."

"His Royal Highness said that it is for the sake of the salt health of the people of Datang, and in the future, after the filtration cost is reduced, His Highness will gradually reduce the price of salt with a higher filtration procedure." Chang Lin introduced to Li Shimin.