Song Jiu stayed at home to experiment.

Nothing on that high platform is the main thing, the main thing is on this wood. In fact, Song Jiu was a little confused and made a big deal about that high platform. Of course, being careful is reasonable.

Start to repeatedly experiment with the winding method, how to wrap the iron chains is the most critical step. If you don’t wrap well, it will not only save effort, but will also cause the iron chain to get stuck.

My eldest sister was worried and came to the Song family again before buying vegetables.

"Sister, follow me."

Song Jiu brought his elder sister to Dongshuimen, which was a majestic city gate built on the Bian River. Two tall urns on one left and one right, each with a corner gate, and then erected a building on the flat bridge, using iron-wrapped window doors as gates, that is, iron fences, which were placed at night. However, the commercial atmosphere became stronger and the ships on the Bian River were constantly coming and going, which was not a critical time. If it were not for special circumstances, fewer iron fences were placed.

After leaving the Jiaomen and passing Hulong River, the sandbank outside the city is the same length as the Shazhou in the city, but it is wider than the sandbank in the city. In fact, as Hulong River is separated, this giant sandbank is divided into two.

Tokyo City began to flourish, but certainly not as good as it did later.

There are more and more people in the city, but not many people live on this sandbank. Most of them are planting some vegetables and food. There are many reeds growing on the banks of the Bian River. They have just emitted green leaves, half green and half yellow, and the river wind blows, making a rustling sound.

Song Jiu said: "Sister, rely on the mountains to eat the mountains and water to eat the water. This river is the Golden River."

"So what?" The eldest sister was puzzled.

It is good to rely on water to get water. Almost most of the people in the river make a living by relying on this Bian River. But we cannot say how good it is. The Yellow River has more mud and sand, and the water level is raised. When the summer and autumn flood seasons are reached, the Bian River will also be lifted, so we desperately raised the Bian Dike and reinforced it.

As summer and autumn come, neighbors will have to distribute manpower to patrol.

There are benefits and disadvantages, why do you say so affectionately?

Song Jiu turned his head and looked at the city wall behind. Although it was a water gate, the defense was not low, and there were many horse faces and battle sheds on it.

"Sister, where does my supply come from?"

"Xiao Jiu, why do you think of asking this?"

"This is the key. Our dynasty's supply mainly comes from Shandong, Henan, Hebei, Guanzhong, and Henan. Most of the supply from Henan came from the Cai River. So as soon as the emperor ascended the throne, he immediately ordered the urnation of the Cai River. In the second year, despite the turmoil and uneasy autumn of the country, he sent tens of thousands of people to dredge the Cai River and directly to Yingchuan. This year, he asked the ministers to lead thousands of people to dig canals, divert the water and combine the Min water, so that the supply from most parts of Henan canals canals canals canals canals canals to be transported to Huimin River through the Cai River. The supply from Shandong is Wuzhang River. The second year of the emperor ascended the throne, the silt of the Wuzhang River was not conducive to boating, so he sent people to dredge them, and in the third year, the Jinshui River was related to Luoyang and Guanzhong. He also sent people to dig canals to divert the Jing River to Beijing in the second year of ascending the throne. But what about Huainan and Jinghu?"

"Where did the money come from those two places?"

"Sister, it's good. The court has gained new Jinghu and Hunan, but where Li Chuyun killed people and ate human flesh, forcing both the military and civilians to rebel. The court is pacifying and there is no time to compensate, so don't withdraw taxes. Huainan started in the previous Zhou Dynasty and came to our dynasty, and Li Chongjin rebelled in Yangzhou. The people in the Huai River were caught between the two Huai Rivers and the people were living in poverty. How much tax can they be imposed? So the Bian River now seems not as important as the Wuzhang River and Cai River, and it is only a little better than the Jinshui River. But what about the future?"

"Xiaojiu, I'm a woman, I don't understand what you said."

"Sister, what I am talking about is that this river will be a golden river in the future. Now it is a vegetable garden, a wasteland, a reed, a wild willow forest, and in the future it will be a place full of gold and gems. Whoever seizes the opportunity first will never have to worry about food and clothing for the rest of his life."

The reason why Song Jiu said this is a painting, a very famous painting, "Along the River During the Qingming Festival".

Where did this painting draw from? It started from the downstream of the main Bian River and the tributary, and it was a little far from the capital. So by the end of the Northern Song Dynasty, the population was not too dense, and then at the Hongqiao at the confluence, it has not yet come out yet, and then painted to Dongshuimen. The city has nothing to do with the river, and it paints the situation in Dongshuimen, Hebei. Therefore, I don’t know what the Dongshuimen River will look like in a hundred and twenty years later. But I think it will not be worse than now.

"Xiaojiu, I still can't understand the eldest sister."

"Sister, I'm just saying it, it's just an idea for the time being. Things in the family are the first pot of gold."

The eldest sister still couldn't understand, and only heard that this younger brother seemed to have great ambitions.

On the third day, Song Jiu was still debugging at home.

A noble guest came, Kaifeng judge Liu Yi. He could not be regarded as a top minister in the temple, but in Song Jiu's eyes, Liu Yi was no longer a small official.

Put down the chalk in his hand, and debugging cannot be done blindly. He also needs to use formulas to calculate. In fact, he forgot a lot of them. Fortunately, he worked as a tutor in college for several years, which means that he would review all the books from junior high school to high school in those years. Later, he entered society and his uncle's child went to school, and he often came to ask for advice. This was like three times of review. Therefore, when he came to the Song Dynasty, he still remembered a lot of the knowledge in college. As for the knowledge in college, he basically handed it back to various tutors.

But dealing with it is enough.

It was very uncomfortable to use a brush and wanted to make a pencil. A pencil core stumped him. He made a quill with ink, so he made a blackboard with ink and made a chalk with lime.

Song Jiu was not surprised by Liu Yi's arrival.

In my previous life, some people said that the Song Dynasty was not good, weak, and hateful, and some people said that the Song Dynasty was good, wealthy, and focused on internal governance of people's livelihood. These are all stories on paper. When I came to the Song Dynasty, I wanted to find a way out, so I asked about a few big rivers. Zhao Kuangyin put on the imperial robe. Many generals in various places were dissatisfied with them. There were also the difficulties of the Southern Tang, Northern Han and Khitan. That's it. Zhao Kuangyin also managed water conservancy extensively. At this time, the Bian River was not very harmful. Zhao Kuangyin issued a keen edict, asking the governors and officials of the prefectures and counties along the Bian River to plant elm and willows on the shore in the spring to strengthen the dikes. The leopard was seen in the pipe.

The Song Dynasty mostly traveled from the water, and carried it up and down, so how much labor did it take to make this thing a year? Zhao Kuangyi might not have thought of it at the time, but he would definitely care about it later.

Song Jiu doesn't care.

Even if you want to learn, it is not easy.

Judge Liu came in and saw the room, and he was stunned on the spot.

It is easy to make a chalk blackboard, but he has never seen it. This is not the reason why he was stunned. Song Jiu's calculation formulas remained the same as before, using English letters and Arabic numerals. Liu Yi was also a knowledgeable person. Later, he joined hands with Zhu Dong to create Yuelu Academy. But when did he see such calculation formulas?

"Jiulangjun, you are..."

"Report to the judge, and the subjects use it to calculate."

"calculate?"

Song Jiu explained one, two, three, four, five, six, seven, eight, nine, and other codes.

"Judge Liu, it is more convenient to calculate with this code." It is not said that these two symbols come from the West, but only said that they are code names.

"What pen is this?"

"Similarly, it is still convenient. It is slow to use a brush. I made a stroke with lime and applied it to this blackboard. It is quick to write and saves costs. I don't need to use a wipe to wipe it."

"This is good..." Liu Yi's eyes shone.

Pen, ink, paper and ink were expensive in this era. As pine trees were cut down in many areas, ink became more and more expensive, and paper was better in the future. After bamboo paper technology was improved, the price of paper fell, but now it has not come out. Many poor children in families used tree sticks to draw words on the sand in order to write, just like Ouyang Xiu.

Liu Yi had nothing, and Wuya came to see it. It was worth the trip just by using this chalk.

In fact, there are many things worth running for him, such as this formula, the big screw and wrench, but unfortunately this is beyond his understanding.

"Judge Liu, although the brush is the real brush, if it can be promoted, it will allow more children from poor families to read. If you are interested, I will pass on its manufacturing method to you."

"Okay, how do you tell me about this thing?"

"It can be calculated using formulas, but the friction parameters are not very easy to calculate. But the pulling force can be predicted, two people pull, half a stone force..."

One Song stone is equivalent to more than one hundred kilograms. The two of them work together to pull the strength more than half a stone. Two or three stones with great strength can be done. However, this is not a quarter of an hour, but a pull all day long, and it can only be considered half a stone. If it cannot be pulled, the cargo will fall suddenly, it will be a few tons of cargo. When the person hits the person, the person can crush it into dust and hit the boat, and the small boat can only sink.

"The subjects have calculated that this arm shaft is only pulled with two or half a stone. If it is well designed, its maximum valuation is more than 600 stones. It cannot be pulled like this. The goods are lifted too heavily. The mesh rope, shaft, and iron chain may not be able to bear it. The more effort it saves, the longer the distance, it saves effort, but wastes time. Therefore, the subjects turn its valuation into two hundred stones to one hundred stones. With the consumption of friction, the actual weight that can be pulled up is between fifty stones and one hundred stones. But if you want to be safe, it is better to still be fifty stones. Look, there are many hooks designed on this shaft. The different position of the hanging is, and the weight of the pull is also different. The heavier the time it takes, the longer the lighter the time it takes, the shorter the time it takes."

Song Jiu wiped the blackboard with a wipe and wrote the formula in chalk.
Chapter completed!