"Your Majesty, do you want to eat?"

"No need to ......"

I just wanted to wave my hand to refuse, but after hesitating for a while, Li Yuanjia still nodded and said, "Forget it, just have a bowl of white porridge and two side dishes...... Go to the study! ”

Although I was not hungry at all, it was still early, and if I didn't eat anything, it would be a difficult night.

“…… Yes, King. ”

His eyelids jumped, and Han Shan nodded helplessly.

Ignoring his housekeeper, Li Yuanjia walked into the study and sat down. Next, he instructed Chunyan and Liu Mei to take out a few pieces of white paper, sharpen two willow branch charcoal pencils, and then took out a small notebook bound with white paper and looked at it carefully.

A dozen pages of booklets, each page is a sketch.

It is said that it is a sketch, but in fact, it is still drawn quite carefully, each one is quite clear, and every line is marked with a number - this is something that Sun Peng spent nearly an hour drawing after today's "picnic".

If it weren't for Li Yuanjia's fast hand speed and high level of sketching, he really wouldn't have been able to handle this booklet.

After reading it carefully for a while, Li Yuanjia got up and found another booklet from the bookcase, and then put the two books together and looked at the time of the small half-burnt incense, until the white porridge and two dishes were sent in, and then he put them down satisfied.

While washing his hands in the clean water brought by the spring smoke, the corners of Li Yuanjia's mouth also showed a smile.

The rollover thing is finally done.

Just now he looked at the drawings of the old-fashioned overturned car, and the new model made by Chen Zhi and them not only greatly reduced in size and weight, but also reduced the number of parts by one-third - which means that for the carpenters of this era, the difficulty of making it has also been greatly reduced!

As a result, manufacturing time and costs are reduced.

If it used to take three or four carpenters half a month to overturn, now it only takes two people and ten days to complete. If you use the planer "invented" by Li Yuanjia, you can do it in seven or eight days. Therefore, in the case of a significant reduction in the amount of raw materials, the labor is only a quarter of the original!

Roughly calculated, the cost is only about one-sixth of the original!

And this is only the cost of a single rollover, if ten are made, this number will become at least one-eighth, if it is a hundred, it may be reduced to one-tenth......

"Of course, the premise of everything is that it must be done according to my method!"

Sitting on the small table opposite the desk, while drinking porridge slowly, with side dishes, Li Yuanjia secretly pondered.

He didn't let Chen Mu take out that thing today. It's not that they deliberately kept it a secret from Fang Zhizhi, but because of the relationship of time, Chen Mu just made a small model, and Li Yuanjia planned to wait for them to make a real guy before showing it to others.

But Li Yuanjia has no intention of continuing to improve the rollover.

Or in the case that it is enough to meet the needs at the moment, at least he does not intend to let his own people improve. As for whether anyone can do better in the future, that's not his business.

But now that the car has overturned, it is something he must consider.

Because he knew that Fang Yizhi had seen the new overturned car, it meant that Liang Guogong of the Tang Dynasty would soon be able to know...... No, calculate the distance and time of the three brothers and sisters of Fang Yi to go home, and you should already know by now. Then it is conceivable that Li Shimin, who is always worried about food, should soon find Li Yuanjia's head.

Convenient irrigation tools are exactly what Datang needs most now.

The emergence of the Quyuan plough can save a lot of manpower and animal power, and after the vigorous promotion of the imperial court, there are probably tens of thousands of Quyuan ploughs today. And this result means that the more curved ploughs in the back, the more land people can cultivate, or the more wasteland that can be cultivated.

But the fields need irrigation in addition to human cultivation. Cheaper and lighter overturning cars can naturally save more manpower and animal power, and naturally cultivate more land.

This is undoubtedly quite important for an agrarian society.

"So, it's another chance!"

Thinking that the white porridge and side dishes in his mouth would no longer taste, Li Yuanjia simply pushed the small bowl and stood up, returned to the desk, and began to write......

……

The next morning, after the morning dynasty, Li Yuanjia just wanted to leave, and a chamberlain hurriedly walked to his side and said in a respectful whisper: "Your Majesty, Your Majesty, please go to the Ganlu Palace." ”

"yes, got it."

Li Yuanjia, who had already prepared in his heart, was not surprised, and naturally walked to Fang Xuanling's side, and chuckled: "Xianggong, let's go over together!" ”

He saw clearly just now that the waiter had found Fang Xuanling first, and then he had found himself. Thinking about what Lao Fang said to him before, Li Yuanjia naturally understood the reason why the second child was looking for him.

"Okay."

Nodding, Fang Xuanling smiled and made a gesture of please.

The two of them walked together in the direction of the Manna Palace, and behind them, several important ministers were all brightly eyed, their eyes followed the figures of the two of them, and they looked thoughtful......

……

"Yuanjia, what's the deal with the overturning?"

Sure enough, as Li Yuanjia expected, as soon as he saw him, Li Shimin asked directly: "I heard that the prime minister said that you showed them a rollover car the day before yesterday, which is light and compact, and the cost can be reduced a lot?" ”

"Yes, Your Majesty, it is."

Li Yuanjia naturally didn't dare to slack off, and immediately nodded and said with a smile: "When my brother was in Luzhou, he presided over the Spring Festival many times, and he saw the hard work of the farmers, so he made a quyuan plow." Later, the younger brother also saw the hard work of the peasants diving into the water for irrigation many times, so he thought that if he could dig a ditch by the river, and then use a light and convenient thing to pump the water up...... The subordinate brother was ashamed, and only then did he know about the existence of the overturned car. ”

When he said this, Li Yuanjia was really ashamed on his face.

He'd really seen a tube car, after all, that thing is a sight to behold in many tourist attractions. But such a thing as a rollover car has almost disappeared in the 21st century, and Li Yuanjia really didn't know about it until the Tang Dynasty.

Then taking a deep breath, Li Yuanjia continued: "It's just that after the younger brother saw the overturned car, he found that this thing is too bulky and expensive, and ordinary farmers can't afford it at all." So after thinking about it, the younger brother decided to let people try it and make a flip that was as convenient and easy to use as a zigzag plow. ”

"After several years, the first few days finally succeeded."