"The promotion of cotton is a water mill, and it is certainly not something that can be done in ten or eight years! This point, as long as you look at the curved plow and the overturned car, are the best things that can increase grain production, but how difficult it is to promote in this era? In ten years, it would be very good for fifty or sixty percent of the farmers in Datang to use the Quyuan plow, as for overturning...... Hehe, I don't dare to think about it! I don't dare to think about it! ”

"The papermaking technology is already in place, and the next thing is to improve the technology a little bit, and when the cost of bamboo paper is greatly reduced, and the quality is also improved, I can retire here...... Well, if it really doesn't work, you can hold a papermaking technology exchange meeting or something, sell it at a lower price, and Wang Pu and they will make paper for themselves in the future. ”

"Movable type printing...... it! I'm afraid that no second goods are willing to take over this thing for the time being, right? Even if there is, it is estimated that the most at that time is to learn the technology, and then to engage in some clay type, wooden type, etc., no matter how you think about it, you can't do other people's engraving, right? I'm afraid that it can only be Lao Tzu who continues to throw money into it, when will a complete set of usable alloy movable type be created, which can be regarded as leaving a set of wealth for future generations! ”

When he got up to wash up the next morning, Li Yuanjia was still thinking about a few workshops in his head, as well as the money he had just thrown out, and he really had a headache.

To be honest, he's a bit of a tiger riding right now.

After all, in addition to making the future originator of movable type printing no longer controversial, there is a complete set of metal movable type, coupled with the bamboo paper that will inevitably be made in the future, which means that those "popular" books will no longer be high, if you count Arabic numerals and mathematics, God knows how much influence it can bring to the Tang Dynasty in this era!

But......

All of this is just staying in Li Yuanjia's fantasy.

If nothing else, how difficult is it to promote just one Arabic numerals? Until now, there are actually two people who really like and are willing to use it in Li Yuanjia's eyes: the eldest nephew Li Tai, the king of Wei, and Zhang Cambodia, a student who has just come to Hanwang Farm.

Even if other people have to use it, it is forced by Li Yuanjia...... Of course, there are also because I think it is easy to use later, but the nature is different after all.

But the investment of alloy movable type is really there.

A thousand years later, the Qing Dynasty merchant spent hundreds of thousands of taels of silver and decades of time to finally make a set of copper movable type, in this era, even if Li Yuanjia can greatly shorten the time, but the amount of money to spend is estimated to be huge!

If anyone else, it is estimated that they would have given up a long time ago.

"Tsk, that's spending money like running water!"

Thinking of the money he had just granted to Li Zhong and Han Cheng today, Li Yuanjia began to feel distressed again after the headache.

There is no doubt that the movable type and glass workshops are now big money-eaters!

The paper workshop can still be self-sufficient, especially Han Wang paper wants to be in short supply, in addition to feeding a large group of people every month, the money earned every month can also support them to continue to improve papermaking, especially the investment in research and development of bamboo paper, there is no need for Li Yuanjia to worry about it - don't think this is very simple, in fact, except for Wang Pu and them, the paper workshop of the same era is simply impossible to do!

Research in any era costs money.

It's just that for the ancients, all "research" is a personal act, and almost all of them run through the "production" of only species, so firstly, the cost is within the acceptable range, and secondly, the time will be very long...... For example, how long did it take for a papermaking technique to appear in the Han Dynasty to the popularization of bamboo paper later?

It's always been there for hundreds of years, right?

But what Li Yuanjia has to do is Edison more than a thousand years later...... No, it should be a little earlier, it was the era of teamwork research that was started by the Germans in the 19th century!

There is a plan, there is a division of labor, there is management.

It is not an accidental discovery in production, nor is it a "genius flash of inspiration" driven by personal interest, but a down-to-earth and serious teamwork research!

This investment is dozens of times higher!

Therefore, even if Han Wang Paper is in short supply, under the premise that Li Yuanjia is unwilling to continue to expand the scale, the profit can support Wang Pu and his gang and support them to continue to improve. And this result is actually quite remarkable.

As for the glass workshop and movable type printing workshop...... Hehe, the former has already seen hope, just wait for those windows in the palace to be renovated, it should be able to bring a large amount of income to the Han Palace, but what about movable type printing?

To be honest, Li Yuanjia is ready to lose his life!

Then he will leave a will after a hundred years, and the descendants who inherit his throne must maintain this set of alloy type, and if a few are damaged, they must make a few, and they must use it to print a few books every year......

And what will support the investment in the next few decades is undoubtedly glass for now, and the mirrors that will appear later.

As long as Li Yuanjia can keep these things, the scientific research funds for the next few decades will be available!

So thinking of this, if he hadn't been to the glass workshop just yesterday, Li Yuanjia would definitely call Han Lucheng immediately, and now go and see how Han Cheng and the others are doing! After all, yesterday I "inadvertently" told them a new method, and it is a very reliable new method, what if there is a result today......

"Stepping on ......"

At this time, a rush of footsteps suddenly sounded outside the door, and then Han Lucheng frowned, and hurriedly walked out after owing a debt.

After a while, he walked in with a letter: "King, the letter from Jiucheng Palace is Huangyuan and them!" ”

"Oh? Show me! ”

As soon as he heard Han Lucheng's words, Li Yuanjia's eyes suddenly lit up!

These days, Cheng Zhijie has been accompanying Jiucheng Palace...... To put it bluntly, most of the bigwigs in the DPRK and China are now accompanying them in Jiucheng Palace, and they will return to Chang'an with Li Shimin when the time comes. And Huang Yuan and Ma Zhong, who were sent by Li Yuanjia, naturally stayed there to prepare for the upcoming expedition to the Western Regions.

This matter is extremely important to Li Yuanjia.

For this reason, he not only instructed the two to introduce what they had learned into the army, but even trained a few more "surgeons" in the house, waiting to be sent out to accompany the army.

So when I heard news from the two of them at this time, I was naturally very concerned.

But before Li Yuanjia could open the letter, he heard Han Lucheng continue: "King, I still have something to report to you!" ”

"Well, say."

His mind was on the letter in his hand, and Li Yuanjia responded casually.

"The people from the East China Sea are coming back soon."

After taking a deep breath, Han Lucheng's voice trembled slightly: "They sent someone to come back first to report the news, and ...... According to him, this time each of them drove a large cart loaded with salt ......"