Li Chengyang nodded at Li Shimin, and the matter of the mutual market can be considered.

The mutual market first started in the Northern and Southern Dynasties, at first it was to exchange the tea of the Han people for the horses of the grassland people, and then the scale of development became larger and larger, and it gradually became a special business in the Sui and Tang dynasties, which was distributed in various places on the border, and the materials exchanged were no longer limited to tea and horses, and the imperial court began to formally control it.

Because of the participation of the imperial court, the primitive tea and horse trade has been banned, and the iron tools of the Tang Dynasty have also been strictly ordered not to flow into the grassland, Jieli said that the mutual market can be opened refers to the trading of iron tools, the Turks will not smelt iron, iron tools are scarce, only the big tribes can have good equipment, and the small tribes are mostly weapons made of bones in addition to a few treasures of the town.

There are pros and cons to this matter, once a large number of iron weapons outflow is tantamount to enhancing the strength of Jieli, making the future war more difficult, but on the other hand, if you can exchange iron tools for cattle and horses, it is tantamount to increasing the strength of the Tang Dynasty in reverse, if it is not possible for a long time, but Li Chengyang knows that the Turks will not be able to jump for a few years, and a short period of time will not bring qualitative changes to the Turks.

But in a few years, the cattle and horses exchanged can even double or even more the cultivated land of Datang, with enough cattle and horses, there is no need to worry about no land to cultivate, and the hard-working people never let go of the slightest opportunity to increase production.

This is one of the reasons why Li Chengyang agreed to the mutual market, the opening of the mutual market, the Turks obtained relatively small benefits, and the demand for iron tools is huge, relatively speaking, the demand for cattle and horses is not so large, according to the current price of an iron pot for a cow or horse.

Tens of thousands of cattle and horses are enough to supply the people of the Tang Dynasty, but tens of thousands of weapons are a drop in the bucket for the current Turks.

And he also has his own careful thoughts, as soon as the mutual market opens, his tea will have a place to sell, that place is high and the emperor is far away, and Li Shimin's influence on that is much greater than that of the family, after all, the people who guard the mutual market are military personnel.

If you move a little and put a family skin on yourself, you can trade a small amount of tea with the Turks.

In addition to tea and salt, salt is really more expensive than life, the current salt production is simply outrageously low, and the process is rough, even the top green salt eaten inside the palace is not snow-white color, or a little cyan.

The steps of making modern refined salt are also simple, you can go through the charcoal and then steam and dry, with the quality of the refined salt that is almost the same as in the previous life, I don't believe that it can't be sold at a good price.

I didn't expect to sell much, mainly relying on quality, and it was not used to exchange money, and the meat supply of the prince Liuwei relied on the mutual market, which solved a problem for him.

The idea is good, but Li Shimin disagrees with it is another matter, Li Shimin thought carefully after getting Li Chengyang's affirmative eyes: "It's okay to open a mutual market, but the iron must be exchanged for cattle and horses, after all, I don't have many iron tools in Datang."

Jieli nodded, this has also been discussed a long time ago, after all, no one is a fool, he wants to get iron tools but he doesn't want to pay something, how can there be such a good thing, if Li Shimin agrees without mentioning any conditions, he still thinks there is any fraud in this.

Then the two of them began to discuss how to open the mutual market, Jieli leaked a little bit of the momentum of the king at this time, and Li Shimin bounced up without letting go, the two fought and did not come to any good conclusions, and finally decided to calculate according to the previous price for the time being.

After the discussion of the mutual market, the following conversation came to the most important part:

"Send back all the people of the Tang Dynasty that you have plundered, and then you can withdraw the army" Li Shimin put away his crossed legs and sat upright.

Jieli smiled, and finally came to his link, the people of the Central Plains are like this, they regard their people as extremely important, this is the main purpose of his negotiations, and the rest is just an addition, as long as the affairs of the people of the Tang Dynasty can be negotiated well, then he will not lose, and he can even have a better reputation among the Turks.

"We can send people, but we can't send them in vain" This time it was Jieli's turn to Erlang's legs.

"We have captured more than 80,000 people in total, so I'll give you a whole number, 80,000 people, 100 yuan per person, pay for it."

Li Chengyang was furious when he heard this, and was about to give Jieli a long memory, so that he could think carefully about whether he had said the wrong thing, but he was forced back by Li Shimin's look.

"One hundred guan, my people of Datang are worth it, so let's go, don't you still have our Han people on the grassland, I am also out, or one hundred, I want as many as I want, I will give you one hundred guan if you send one person" Li Shimin not only did not bargain, but even took the initiative to send money to Jieli.

Jieli is happy in every way, the Han people on the grassland are slaves, except for a small number of craftsmen who can get some good treatment, the rest of the Han people are used to do some coolies, and there is not much coolie work to do on the grassland, how to teach herding things can not be taught, it can be said that they are raised in vain.

It would be great to be able to exchange some money and grain now, no matter what the Han people on the grassland say, there are still tens of thousands left, deduct those craftsmen, and send the rest of the brains back, how to say that he earns.

Zhao Deyan didn't expect me, once he said something about the people of the Tang Dynasty, Li Shimin listened to everything.

The last thing was also discussed, and the covenant drafted by Li Chengyang himself was also written, and both sides carefully looked at the terms inside, saying that it was not bad, so be it, and then took out their respective seals and stamped them, and the matter of the Turkic begging was completed, and the next thing was that the two sides made an oath, and then the Turks withdrew.

The two sides went out of the tent and returned to their own camp, Li Shimin changed his dress and returned to the bridge with his ministers, Jieli also brought a group of people to greet him, and Jieli also pulled a white horse in his hand, which was a sacrifice for vows.

The two sides stood still, and Jieli took out a jeweled sword and stabbed Hakuba in the neck, then smeared the blood on his cheek.

Li Shimin wiped a little horse blood on his lips in disgust, and the two sides swore that they would always be friends from now on, not to interfere with each other, and said a nonsense that I don't know who would believe it, Jie Li couldn't help but say goodbye first, and if he stayed, he might not have time to dare to go back to the grassland.

When the dust settled, Li Shimin left Cheng Yanjin and Qin Qiong to monitor the retreat of Jieli's army, and he took Li Chengyang to the dragon bowl and walked all the way back to the palace.

"Dad, how do you know that Jieli doesn't want our annual allowance at all, didn't you say that it is acceptable to give a small amount of annual allowance when we first discussed?" It wasn't until there was no one around him that Li Chengyang raised his own questions, Li Shimin had given him a gag order before, and the conditions of the contract were not allowed to be mentioned to anyone.

Li Shimin lay on his side on the dragon bowl and took a sip of wine, and smiled: "How did I know that Jieli was so intimidating, it seems that he is really old."

Li Chengyang stopped talking, it turned out that Li Shimin was also gambling, but seeing that Jieli was a bit like a frightened bird at that time, he was ready to deceive him, who would have thought that just a simple threat would make this grassland khan's soul not possessed.

This means that Li Shimin came in person, and no official in the Ministry of Rites would dare to open his mouth so loudly, in case Jieli was annoyed and ashamed to wave his troops to fight, no one would dare to bear such a big responsibility.

"Then since you have long known that Jieli was frightened, why did you still open a mutual market, and even took out so many goods to redeem our people in Datang, wouldn't it be better to be scared directly, in case Jieli was afraid for a while and agreed?"

"Mutual market? It's been there for a long time, do you think that just the ban on the trade of salt and iron on the surface has nowhere for him to buy it, so where did the swords in their hands come from, how can they afford to raise so many people without salt? Just by their meagre production? Relative! When it came to the mutual market, Li Shimin looked helpless and angry.

Think about it, no matter how strict the control is, there are always people who try their best to find loopholes, a tea brick with two sheep, an iron tool and a good horse, who is not greedy for such a lucrative business, even he, the prince, plans to take a piece of the mutual market.

"So the mutual market is dispensable? Even the prohibition has not completely isolated the salt and iron trade, and now it is just putting these from the dark to the light? Li Chengyang raised his own questions.

"Yes, establish a mutual market, everyone there will collect taxes for me, collect them fiercely, and send Wang Yun over when the time comes, Wang Yun, do you remember? It's the squire in the household department, and now the accounts are almost checked, send him over, use your method to manage it, and no one will think about not paying taxes."

Li Chengyang nodded, Li Shimin's operation is really incomprehensible to ordinary people, a mutual market, they have not come out at all, what is the original is still how it is now, there are many harvests, but the iron is monopolized by the Li family in Longxi, once in the mutual market, it is a herd of cattle and horses, and the benefits are great, and since the mutual market is opened, it is a pity that such a huge profit and all rely on the occasion of Datang not to collect taxes.

It can be said that Li Shimin has made a lot of money in this mutual market, and the cattle in exchange can be put on nose rings to plow the land, the good horses can be used to fill the army, and the bad horses can also go to the ploughland, there is really no waste at all.

"Then, Dad, what do you think about redeeming the people, look at Jieli's appearance, as long as the conditions are similar, he can agree, he is just for the sake of face, he didn't expect this to happen, didn't you see Jieli's face full of astonishment?" As soon as a problem is solved, a new problem arises,

This is also one of Li Chengyang's most incomprehensible places, Jieli can now be said to be a lost dog, let Li Shimin ravage, what he is afraid of is nothing more than running away in a hurry and losing face, so that he can not continue to maintain supreme prestige in the Turks, Li Chengyang can see that as long as he gives Jieli a little step, he will immediately borrow the slope to get off the donkey.

"Then do you think it is better for the Turks to have a wise monarch or a mediocre monarch?"

"Of course it's mediocre, like Jieli's."

"You all know that Jieli is incompetent, and you still don't help him stabilize his position, so you have to change to a wise khan?"

That's right, now it's impossible to go to war head-on with the Turks, so just keep Jieli to continue to plague his tribe, if a wise and martial khan leads the grassland, it will really become a big trouble for the Tang Dynasty.

After Li Shimin finished speaking, he lowered his head and was thinking about something, and after a while, he said again:

"Also, Datang has not been at war for too long, for several years, and many people have forgotten the ability to fight, which is not a good thing."

Li Chengyang was taken aback, he naturally understood the truth that forgetting the war would be dangerous, the tragedy of the Song Dynasty was still in his mind, and he naturally knew what it was like for the whole country to come up with a decent general, what he didn't expect was that Li Shimin actually started to prevent similar incidents so early.

Li Shimin played a big game of chess, no wonder he gave him a gag order, otherwise he would talk to anyone about the content of the contract.

He put a knife in the hearts of all the officials of Datang, and set up an imaginary enemy for everyone, so that they can always maintain a strong hatred, and don't forget the foundation of their lives.