For Li Yuanji, this is a common-sense mistake.

Because everyone in later generations knows this matter, all scientific research departments will not study a project and put it into use immediately.

Especially at the national level, the approach they usually take is to invest one generation, store one generation, and research another.

The advantage of this is that you can avoid waste to the greatest extent and do more with limited energy.

Take the military industry as an example, this year a new project is directly put on the horse installation, if one is being made next year, will it continue to be installed?

Doesn't it take time to assemble? Don't need to replace what you've already equipped?

The time difference of one year, or even two years, is not even enough to equip all these new equipment in the troops, and even if it can be done, it will not be possible to comprehensively improve its combat effectiveness to the level it should be.

Frequent changes of equipment are certainly not a good thing for the troops, although the equipment changed is very advanced.

Therefore, it is necessary to equip a generation, store a generation, and study a generation.

When the third generation of research is completed, if there is still a lot of time, then it is completely possible to study the fourth generation, eliminate the second generation, and use the third generation as the next generation ready to be installed.

The same is true for other scientific research projects, of course, in later times, agricultural research basically did not need to store any technology, as long as it was proven to be reliable, it could be directly put into use.

But that premise is that in the future environment, there will not be too many peasants, and there will be enough jobs to provide for them.

Even technology companies, they will not take out all the advanced technologies in one go, one is that everyone will not, this is the industry rule, but once it is taken out, there will be fewer highlights of the next generation of products.

"Input still has to be invested, but it is necessary to distinguish places!" Li Yuanji's consideration is naturally more comprehensive than Li Chengguang's, although Li Chengguang's consideration also has his reasoning, but after all, he has not traveled too many places, and he is not particularly familiar with every corner of Datang.

And at this time, Li Chengguang also began to cheer up, looking humbly taught.

"The north of the town is vast and sparsely populated, subject to population restrictions, and there are still large tracts of land waiting to be cultivated, and this new design can be used there, so that the labor force there can go to reclaim more land, so as to make the food supply within the Tang Dynasty more sufficient." Li Yuanji said.

Li Chengguang looked suddenly enlightened, he knew Zhenbei, but he hadn't been there, he only knew that there were not many people there.

No, there seem to be hundreds of thousands of people, but the population density is not much.

Most of the people gather in the two cities of Zhenbei and Hubei, which are the core of the whole Zhenbei, and there are some villages in the surrounding area, but the population is not large, because there are many mountains, which are not conducive to farming.

Beyond the north of Hubei, the endless prairie has been transformed into an endless field of fertile land, herds of livestock, and each family has its own pasture, which produces enough manure to supply its own farmland.

Therefore, the grain output in the north of the town is always higher than that in the Kannai area.

In recent years, the imperial court has not immigrated to the north of the town much, and even if there are immigrants, they still want to go, and they feel that they can't get mixed up.

But even if this is the case, it may not be approved, because the imperial court consciously wants to control these immigrants, and their destinations will be Jeju Island, the Korean Peninsula, and even the Western Regions in the future.

In such a situation, the importance of Zhenbei is self-evident.

On the premise of not continuing to invest in the population, only by improving the mode of production and increasing production efficiency can its output be increased several times.

And mechanized farming, just right for this, with these machinery, with the latest enhanced version, not to mention more, it is completely no problem to reclaim five times more land, not to mention that the grain in the north of the town can supply the entire Datang, but at least one-fifth of the Datang is still no problem.

This operation is more spiritual, as long as it can be stable for ten years, it means that in the next two years, even if all natural disasters and man-made disasters in Datang are out of production for two years, there will be no large-scale starvation to death, because there are enough food reserves.

After Li Yuanji's suggestion, Li Chengguang seemed to have thought of these things.

But regardless of whether Li Chengguang has thought of it or not, Li Yuanji is still very satisfied with his performance this time.

"Recently, you have been going to the Academy of Sciences more often, watching more, listening more, learning more, and talking less!" Li Yuanji commanded at Li Chengguang.

Li Chengguang's road is generally arranged by Li Yuanji, and he rarely goes to places that he is not allowed to go.

It's not that I haven't been curious, but in the end, reason still suppresses curiosity.

For Lee, the decision may be just one that is no different from the others.

But for the surrounding ministers, it was a decision that surprised them.

Academy of Sciences, what kind of place is that? The Emperor's forbidden land, a place where no one is allowed to interfere with anything but the Emperor, is rarely even open to others, and if the ministers want to come, they must apply first, or the Academy of Sciences has invited them.

And now that Li Chengguang can come here on his own to observe and learn, isn't the deeper meaning obvious enough?

To put it more colloquially, Li Chengguang is now basically sitting firmly on the throne of the prince, and there is basically no suspense.

Li Yuanji left Ma Wu and Li Chengguang behind, and left the test site with the other ministers, they stayed here for a long time, they saw everything they should see, and they did everything they should do.

On the way back, each had their own different thoughts.

There was nothing to say all the way, and it wasn't until Li Yuanji returned to the harem that he stopped and greeted Fang Xuanling, as if he remembered something.

"Prepare, when the Zhengdan Dynasty meets, I will canonize the crown prince." Li Yuanji and Fang Xuanling said alone, he also thought about it a lot along the way, and also carefully thought about Li Chengguang's growth process for more than a year, although he is still a little young now, but it is not an excuse, it is not enough to hide his excellence.

Li Yuanji is not an indecisive person like Li Yuan, and he doesn't need to check and balance each other between the two princes.

He is the kind of person who will support him with all his strength once he is sure, and Li Yuanji has also thought a lot about this, including on the way back, he has been thinking about it.

"What about the other princes?" Fang Xuanling asked, canonized the crown prince, and other princes will also be canonized, which means that the status has been determined, and for those young princes, it is indeed a little cruel, but if you want to blame them, you can only blame them for being born too late, and if you miss this opportunity, you can only blame Li Chengguang for being too good, completely covering their light.

"Let's draw up a title first, and move out of the palace when you reach the age of fifteen."