Except for Xu Qilin, no one knows where the trajectory of history will go in the next ten years, that is, during the reign of His Majesty Li Er.

With the variable of Li Sipang, although history has changed, the general environment around Datang has not changed much.

Xue Yantuo in Mobei, Goryeo in Liaodong, and Western Turks in the Western Regions are the three great enemies of the Tang Dynasty.

But in comparison, the Western Turks can create some trouble for the Tang army in the Western Regions, but it is already the twilight of the Western Mountains, and the twenty or thirty thousand Tang troops plus the vassal troops are enough to deal with.

As for Xue Yantuo, although Li Simo's department, which served as a buffer and early warning, would not play a big role, it was not so easy for Xue Yantuo to travel a long distance from Mobei.

Perhaps, His Majesty Li Er has already lined up the generals, just waiting for Xue Yantuo to attack far away, and give Xue Yantuo a heavy blow at the door of the house, so that he will collapse!

Therefore, Goryeo in Liaodong is the enemy that His Majesty Li Er wants to fight the most. This was not only seen by Xu Qilin, but also guessed by many ministers.

And in order to conquer Goryeo, two conditions need to be met.

One is money, food and materials, which cost several times more than the conquest of Gaochang; The other is an excuse, Xingshi is famous, and in ancient times, he was very particular about this.

Many people, including His Majesty Li Er, did not expect that the big surplus treasury would become an institution that makes money every day and will become an engine to promote the historical process.

In fact, it is not wrong to make money every day. But it is obviously not enough to rely on such an institution to raise funds to mobilize the people.

But there is Xu Qilin in Dayingku, there is a printing workshop below, and the "Book of Agriculture" has been published throughout the country, and has been designated by His Majesty Li Er as a must-read for local officials, and requires local officials to supervise and guide the people to follow it.

Only this soil method of manure will at least make each acre of land three or five catties more, right?

Don't underestimate these three or five catties of grain, you have to count how many fields there are in the country. According to historical data, the amount of cultivated land in the early Tang Dynasty was about 200 million or 300 million mu, and the extra dozen of grain was about 1 billion catties.

You don't have to count it so full, take half of the increase in production, and the overharvest of grain is also about 500 million catties.

It has been three or four years since Xu Qilin launched the encyclopedic "Book of Agriculture". Even if the first two years were digested and absorbed by officials, only the last two years were counted, which is quite an astonishing amount.

With the development of Hexi, Longyou, and the Western Regions, as well as the continuous reclamation of the south, the amount of cultivated land is still growing, and the income brought is enough to support the Tang army to continue its foreign campaign.

Coupled with the establishment of customs, the extension of the Daying Treasury store, and the opening of the Silk Road, the entire Datang trade was driven, so that the income of the treasury also continued to grow.

"As long as there is enough money and abundant food, the country will be able to maintain peace and stability for a long time." His Majesty Li Er sipped fragrant tea lightly, and said to his fat son who was studying government affairs earnestly: "The people do not give more money and the country uses enough, can do this, why worry about the country is not solid?" ”

Li Sipang was flipping through the statistical reports of the household department in the past few years, and when he heard his father speak, he hurriedly sat down and listened attentively.

The truth is very simple and clear, the common people can eat enough, even if they don't starve to death, who will rebel? And the Chinese people are the most patient.

"The teachings of the father and the emperor are remembered by the children." Li Sipang arched his hand and said: "The conquest of Gaochang is not a minister, the relief of the people of the Weihe River flood, the money and grain of the imperial court are quite sufficient, all of them are the wise father and the emperor, and the country is governed well." ”

His Majesty Li Er smiled faintly and said, "Qingque, why don't you say that I also built the Daming Palace?" ”

Li Sipang hurriedly said: "The terrain of Taiji Palace is low and wet, and the father emperor's dragon body is related to the Tang Dynasty, and it should be cultivated." In addition, the Daming Palace was repaired, and the money of the states was not used, nor was the money reduced to hundreds of officials, let alone given to the people. It is unprecedented to build a large scale of construction without working the people and money. ”

His Majesty Li Er stroked his beard and chwed his head slightly, and said: "Building a lot of construction without working the people and money, your words are on the key, but not completely. ”

After a pause, His Majesty Li Er explained: "There must be laborers, but instead of letting the people serve, they are hired normally. Therefore, the people did not feel their suffering. It is needless to say that it hurt money, but it was not given and the treasury was not used, but the money of the royal treasury was used. ”

For the construction of Daming Palace, Li Sipang was in Luoyang at the time, and he did not know the situation very clearly. Listening to His Majesty Li Er's explanation, he couldn't help but suddenly realize and nodded again and again.

The money of the royal inner house, isn't that what the big surplus treasury earns?

Thinking of this, Li Sipang felt that he could take the opportunity to say a few good words to Xu Qilin, so he said: "There is no big business in the royal inner mansion, but the big Yingku is doing a good job and making a lot of money. ”

His Majesty Li Er smiled and said, "That's right, most of the money in the Daming Palace is indeed from the Great Ying Treasury, and Qi Lin's means of making money are impressive. Just that mirror has earned more than millions. ”

Li Sipang couldn't help but be taken aback, millions of dollars were only earned by the mirror used for photography and makeup, and it was the first time he had learned the details.

His Majesty Li Er saw the surprise of his fat son, and said slowly: "Don't just look at the sales of mirrors in Chang'an, before Gaochang was captured, the mirrors were already sold overseas through Yangzhou and Guangzhou, and the profits were huge and eye-popping." When the Western Regions opened, the mirror was the most popular, and it was a large amount of income. ”

"It turned out that it was sold overseas." Li Sipang exclaimed: "This kid doesn't know much, just my Datang domestic family, in fact, he also makes a lot of money." ”

"The huge profits of sea trade are indeed something you didn't expect." His Majesty Li Er didn't blame his fat son, and when he got the data report, he was also surprised.

After a pause, he said slowly: "Your relationship with Qi Lin is okay, and you will be closer in the future." In terms of age, you can also use it. ”

Li Sipang nodded in agreement and said, "Erchen understands. ”

His Majesty Li Er sighed: "It is rare to be able to manage finance, from ancient times to the present, there are really not many people who can leave a name in history." It is said that money stinks, but what can you do without money? You are in charge of Luozhou, so you should feel this too, right? ”

"If you don't know the price of firewood and rice, when your son was in Luozhou, he had such an understanding." Li Sipang said: "If you don't have money, you have to work the people, and the sons dare not do it." ”

His Majesty Li Er nodded yes and said, "There is also Immortal Lu Yu, who can guide Qi Lin, it is his creation." Such worldly masters must be respected. ”

Li Sipang thought for a while and said, "Erchen heard that the old fairy Sun Simiao is coming to Chang'an, I don't know if it's true or not?" ”

His Majesty Li Er narrowed his eyes slightly and said, "This matter is true. I have already told Qi Lin not to leave Beijing. ”

Li Sipang couldn't help but be stunned, Sun Simiao's coming to Chang'an is indeed a big deal, but what is the matter with Xu Qilin, why is he not allowed to leave Beijing?