After the prosperous Tang Dynasty

When the spring returned to the land and the grass grew and the warblers flew, Xuanzong's edict to promote Anlu Mountain was finally issued. After that, Anlu Mountain became the envoy of the three towns of Fanyang, Pinglu, and Hedong.

After all, the officials in Chang'an City have been in power for too long, and Xuanzong's will is the first priority in everything. Regarding the change of military power in the border area, although they also feel that An Lushan has a rich family, they do not immediately feel a sense of crisis.

However, when the same edict spread to the military camp in the northwest border, the impact it brought was completely different.

When Wang Zhongsi's personal soldiers came to look for Wang Sili, he was fiddling with a stack of blueprints that Xiao Yansui had given him—because the construction and maintenance of floor heating required relatively complicated manpower and material resources, so Xiao Yansui finally gave it to Wang Sili In fact, the drawings refer to the most common kang method in northern rural areas in later generations. After all, this is the invention that can stand the test of time and is the most suitable for working people's lives. What are the specific advantages and disadvantages? Xiao Yansui himself said no. Clearly, but she knew that the method of building a kang that can adapt to most northern rural areas is definitely the most suitable.

Wang Sili raised his eyelids a little, and said with a sneer, "You are so rash, looking at you, you thought the camp of the Chinese army was on fire!"

"Hey, I'd rather it's just a fire in the camp of the Chinese Army!" The soldier rushed in, pulled Wang Sili up and was about to go out, "Something happened!"

Seeing this, Wang Sili finally turned serious, because the soldier grabbed him in time, and he didn't even bother to put the blueprint on the table again, so he walked out and asked quickly: " What's wrong?"

"The sage's will has arrived, and I can't explain it clearly in a few words. Anyway, let's go to the general's camp first!" The soldier said in a hurry.

Arriving at Wang Zhongsi's residence, Wang Sili opened the door and walked in, asking, "What's going on?"

In front of the table, there was a solemn edict. Standing in front of the edict, Wang Zhongsi seemed to be still thinking about something.

The soldier who sneaked out to call people just now didn't dare to move forward, hid outside the door and kept gesticulating at Wang Sili, not knowing what it meant.

Wang Sili rolled his eyes straight away, waved his hand at him, and told him to stay, and didn't even return a wink.Only then did Wang Zhongsi raise his head, seeing Wang Sili sitting down beside him with such a bravery, he couldn't help laughing and said: "You have good news."

Wang Sili didn't care about the action of the guard just now who was still frantically signaling not to drag me, and said directly: "Your guards know that they are worried about you being wronged."

If Wang Zhongsi felt it, he turned around suddenly and looked outside the door.

The soldier's reaction was also quick, he squatted in the corner of the wall, and almost ran away.

"These little bastards!" Wang Zhongsi couldn't help but cursed with a smile.

After finishing speaking, without waiting for Wang Sili to ask, he directly handed Xuanzong's imperial edict to Wang Sili, and said, "Look at it!"

"Anlu Mountain is also in charge of Hedong Jiedushi?" Wang Sili couldn't help but raised his eyebrows just after watching the ending, and said "tsk" with the edict, frowning: "In your last memorial to the saint , Did you also resign the posts of Shuofang and Hedong Jiedu envoys? This is great, is it serious!?"

Wang Zhongsi looked at Wang Sili's deep frown, but his brows were so wrinkled at such a young age that he was filled with righteous indignation, he couldn't help shaking his head and said with a smile: "I have been in the northwest and west of Hexi for many years, and I know the local conditions very well. , it can be regarded as quite popular among the soldiers in the army, but the customs and customs in Helong and other places are different from those in the northwest area, so it is reasonable to give way to others."

Wang Zhongsi spoke eloquently, but Wang Sili snorted, and immediately snorted and said, "You don't know enough about Hedong? Then Anlu Mountain is a place where Hu people come from a humble background, and you don't know much about it. Let him go, and he will know. What's the matter?"

Speaking of this, Wang Zhongsi couldn't help but slightly frowned, and said in a low voice: "This is my negligence. I thought that it was too eye-catching for me to be the envoy of the four towns, and I thought too much about it." Let it out a bit. Previously, Ge Shuhan finally captured Shibao City, and the sage praised him a lot. I thought that the sage would promote Ge Shuhan and make him completely in charge of Hedong, but unexpectedly, he would change his post to An Lushan ..."

After hearing this, Wang Sili snorted and said with an ambiguous smile: "Now, An Lushan is also in charge of the three township envoys. Before that, he was also in charge of the transfer envoys and interview envoys in Pinglu and Hebei. - Worried about being too conspicuous? Now, you can rest assured that An Lushan's existence is indeed more conspicuous than yours. "

Wang Zhongsi sighed: "It's just that An Lushan may have a different heart, and there may be other troubles in the future..."

Wang Sili, whose attitude had always been a little sly and sarcastic, became a little interested, and asked seriously, "What do you mean? I remember that you and An Lushan had no relationship before."

Wang Zhongsi glanced at Wang Sili, as if wondering if he should tell him these words.

Wang Sili raised his eyebrows slightly, with a faint impatient look on his face. Wang Zhongsi had been unable to do anything about him, so he finally considered and said in a deep voice: "I also heard from Ge Shuhan later that the Battle of Stone Fort City I only thought of it after preparing a lot of things before the battle."

"Huh?" Wang Sili had a lot of prejudice against the Battle of Stone Castle, so he didn't pay too much attention to it afterwards. Hearing Wang Zhongsi say that there were other secrets behind the Battle of Stone Castle, he immediately became curious. Feelings.

Wang Zhongsi said: "You have also deduced before that under the current situation, it is not worth the loss to forcibly capture Shibao City. At that time, An Lushan invited saints to prepare horses and soldiers, and even bought war horses from others at a high price. , causing the lack of war horses in Tubo, and then a strong attack, this move is really thought-provoking..."

Wang Sili thought for a while, and then spoke surprisingly, "Do you think that the Tubo guards at Anlu Mountain and Shibao City at that time, Antong's song, preposition battle for personal gain?"

Wang Zhongsi became anxious immediately, and scolded: "Children have no gatekeepers in their mouths, what nonsense!"

He also only suspected that An Lushan was uneasy, but he was not like Wang Sili, who directly charged him with a charge of rebellion and collusion with an enemy country. If Wang Sili told the truth, this kind of For the crime, even if An Lushan is favored by Xuanzong now, it is afraid that it will be directed against the barbarians.

Wang Sili rolled his eyes at him, and said in a muffled voice, "I'll just talk to you in private."

Wang Zhongsi ignored him, and continued to scold him: "On weekdays, I always blame me for hiding things from you! You are so obedient, but in just a few words, you have even accused An Lushan of collaborating with the enemy and treason. How dare I talk to you more!"

"..." Wang Sili glanced at him, lowered his head and let Wang Zhongsi scold him, completely ignoring it, and even couldn't help but swear in his heart, scolding fiercely, what should be said in the news later Still don't have to tell him.

It's rare that Wang Sili choked back without saying a word. After Wang Zhongsi scolded a few words, he couldn't continue cursing. He glanced at Wang Sili and happened to catch a glimpse of him holding a piece of paper in his hand all the time. Moreover, the paper of the letter was delicate and delicate. , still with the unique rue flavor in the south of the Yangtze River.

Such exquisite paper obviously would not have come from the extraordinarily rough and open-minded Northwest Border Pass. After a pause, Wang Zhongsi changed the subject and couldn't help asking: "What's the matter with your letter?"

Only then did Wang Sili raise his head, shook the letterhead in his hand, raised his eyebrows and said with a smile: "Didn't Mr. Xiao also send you some New Year gifts a few years ago?"

"He actually wrote you a letter?" Wang Zhongsi didn't believe it at all.

Not to mention that Xiao Song was not a literati who liked to express his feelings in letters. Now that Xiao Song is getting old, he has also mentioned that his own eyes can't see things clearly at close range, so naturally he will not write easily. Believe it.

Wang Zhongsi took the letter paper casually, just glanced at it, and found that it was not a letter, but a drawing, and he couldn't help being taken aback.But fortunately, there are a few markings on the drawing, and after reading it, he said with certainty: "It's not Mr. Xiao's handwriting."

Wang Sili smiled, and didn't pick up the quarrel, but said, "Look at the blueprint? I think the content on the blueprint is quite interesting..."

Wang Zhongsi didn't understand what it meant at the beginning, but when he saw what Wang Sili said, he took a serious look at it, but because he had never seen such a thing as an earth kang, what was in front of him was not real. Therefore, for a while, I didn't immediately realize what the things on the drawing meant, but I was slightly touched in my heart.

It was Wang Sili who saw the suspicious eyes in his eyes, so he leaned forward, explained a few words briefly, and then said softly and firmly: "The texture of the northwest frontier is bitter and cold in winter. If there is this thing, the winter of the people will be much easier. "

At this time, the aristocrats and rich households mostly used coal for heating in winter. However, coal and other things were obviously not affordable for ordinary people. The most practical point of the heated kang was that when cooking with firewood, it could turn the earth The kang was warmed up, and I could just sleep well at night by nestling on it.As for the daily consumption of firewood for boiling water and cooking, it is obviously much cheaper than coal. This opportunity will heat up the whole house, and the severe cold in winter will become less difficult...

Wang Zhongsi nodded repeatedly when he heard this, and couldn't help but said: "It's spring now, the weather is getting warmer, and the clay and river water have also thawed. If the kang can be set up before the busy farming season, the time is just right!"

Wang Sili glanced at him, "Don't worry, we have to try the effect first, and then talk about other things."

As he spoke, he took the blueprint back from Wang Zhongsi's hands without making a fuss, and said casually, "I'll copy a copy and give it to you later."

For these, Wang Zhongsi didn't care much, just nodded and agreed.

Wang Sili originally got up to leave, but after walking a few steps with the blueprint, he suddenly stopped, turned to look at Wang Zhongsi, and asked with some hesitation: "The battle of Shibao City, Anlu Mountain's purchase of horses, What are your plans?"

Wang Zhongsi said frankly: "Always tell the whole story to the sage, the sage makes his own decision."

Wang Sili frowned, and suddenly sneered, his words seemed to be filled with a bit of sarcasm, and he said lightly, "That's not necessarily the case."

Wang Zhongsi also frowned, it seemed that he really wanted to bring back the disrespectful Wang Sili and beat him up before releasing him.

Wang Sili hid simply, but quickly left a sentence before going out: "Anlu Mountain is full of holy family at this time, and he is in front of the emperor, and you are at the border. If you play, he will have a lot of opportunities to argue. It's too late. I still think it's better for you not to say anything right now!"

For Wang Sili's persuasion, Wang Zhongsi did not take it seriously, after sending Wang Sili away, he continued to face the imperial edict, thinking about what to report to Xuanzong.

After all, if he was like Wang Sili, he would be too thoughtful at this age. In the Northwest camp, perhaps it would be a completely different scene...

·

The sky is covered with overcast clouds, and the drizzle outside the window is continuous. Because of the delicate flowers and branches in spring, at a glance, even though it is covered with mist, there is still a bit of greenness and newness. The falling stratus clouds seemed less oppressive.

Xiao Yansui was wearing a coir raincoat, and a coir rain hat was shining on her head. The maid beside her was holding an oil-paper umbrella in her hand and wanted to protect her from the rain, but Xiao Yansui just waved her hand and pushed her away.

In April and May, there are ear seeds and grain rains. As the weather warms and the land softens, farmers and common people are naturally busy in the fields.

The glass and cement concocted by Xiao Yansui have long been on the right track in the workshop. In addition, most of the ancient craftsmen were good at practice and handwork, and those things such as glass and cement were used later. Xiao Yansui stopped paying attention to where.

After this leisure, her eyes once again fell on the farm tools in the hands of the farmers in the field.

Deliberately rushing to catch up with the busy season of farming, after re-inspecting the scenes of many farmers farming and going to the fields, Xiao Yansui basically had a superficial understanding of these fields in the Jiangnan area.

It is actually unrealistic to tinker with some larger agricultural machinery. Under the environment of the Tang Dynasty, it was obviously still in the state of a completely self-sufficient small-scale peasant economy. Large agricultural machinery, no matter in terms of initial production or later maintenance costs, They are completely unsuitable for the current environment.

To put it a little bit exaggeratedly, even those wealthy households with thousands of hectares for two days are obviously more inclined to hire more tenants than machines that can save labor.

--When the level of social development cannot keep up, blindly replacing manpower with industrial machinery will only aggravate the current social turmoil. However, the new balance after the turmoil will not be achieved without the promotion of new technological development. so easy to find...

Seeing Xiao Yansui suddenly stop, under the straw hat, the exquisite face that had gradually opened showed a thoughtful look, and Axiu, who was walking beside her with an umbrella in her hand, hurriedly moved towards the others He made a gesture, and for a while, everyone stood quietly by his side.

After a while, it was Xiao Yansui who turned around by himself, and suddenly asked, "Is there a waterwheel nearby?"

"Water wheel?" Axiu couldn't help repeating, and subconsciously turned around to look at a farmer who had been called from the Xiao family's village to accompany the guide, beckoning him to answer.

The man was stunned for a moment, and quickly replied: "There is a place next to a river in front."

"Go, go and have a look." Xiao Yansui said immediately.

The farmer quickly walked ahead to lead the way.

Jiangnan is a water town. Compared with other places, in most cases, the farmland here does not lack water for irrigation.

Correspondingly, when the water source is sufficient, the local people's consideration naturally changes from praying for rain in arid areas to how to better irrigate.

As for the waterwheel, the ancients adapted measures to local conditions. In order to irrigate things that were built a long time ago, when Xiao Yansui read the books related to the mechanism of the Mohist school, he saw that there was a record on it, and there was already a structural diagram of the waterwheel in the Eastern Han Dynasty. .

After pondering all the way, Xiao Yansui finally made a decision - instead of thinking about getting some unprecedented agricultural equipment, in fact, it is better to make some improvements on the existing basis.

After all, with Xiao Yansui's knowledge reserve, when she was asked to make design drawings, she was still inclined to use all kinds of steel subconsciously. However, the cheap steel and other materials in later generations were important in Tang Dynasty at this moment. The country's military resources are controlled, and the finished steel and other metals are mostly used for armament manufacturing.There are very few copper and iron products on the stoves of many people's homes, and even if there are some occasionally, they are expensive and precious.

After throwing away all the untimely plans in their minds, Xiao Yansui and his party finally arrived at the waterwheel by the river just mentioned.

At this moment in the Tang Dynasty, the use of axles had just taken shape.

When Xiao Yansui and Xiao Song left Chang'an City last year, when they went to Shanhai Town by boat, Xiao Yansui added things like sliding wheels to the sails on the boat as if joining in the fun. It took nearly a year. Here, have pulleys become popular on ships...

As for the waterwheel at this moment, it still basically needs human assistance to operate.

Xiao Yansui made a big circle around the huge waterwheel. In order to see it more clearly, he simply took off the hat on top of his head.

With an umbrella in her hand, Axiu hurriedly wanted to go up to cover her from the rain, but Xiao Yansui also refused.

The drizzle in spring is as soft as crisp, and there is a fresh willow wind on the pavement. The moist raindrops fall on the cheeks, with a slight coolness, and a little bit of mist on the hair, but not cold.

Xiao Yansui stood there, against the rain, and drew a brief model of the existing waterwheel, and he was almost done in his mind - he needed to add some bearings, axles and other designs, and then use the river water to flow The hydraulic power generated when the water is used as the driving force of the waterwheel can naturally draw the river water to a high place.

Moreover, there is no shortage of bamboo poles and other things in the south of the Yangtze River. If you think about it this way, if the power of the waterwheel is sufficient and the position of the bamboo poles for water transportation is properly arranged, it feels that the waterwheel is not only used for forest irrigation. Bringing water into each household is almost a rough ancient version of running water.

Of course, considering that the flow of river water is affected by wind speed and weather, the water pressure generated by the waterwheel is also extremely limited, which will naturally lead to unstable water sources, and "tap water" will inevitably be intermittent. However, as a water storage facility Utensils, who doesn't have a water tank at home at the moment, and the small problems of unstable tap water don't feel like a problem at all.

After all, even though such a conception, in fact, can only save the effort of carrying water from the river home, it seems to be a trivial matter, but the development of science and technology and social level, in fact, is not just a daily life. Does a little thing make it easier and more convenient?

Of course, considering the installation of "plumbing" facilities and other issues, it is estimated that ordinary people will definitely not agree to it at first, but she can completely tinker with her own "tap water" system first, let's take a look effectiveness.

Xiao Yansui's thinking went further and further. The current "water wheel" has not been successfully improved into an optimized version that uses hydraulic power, let alone continue to further use the water pool and the continuous tube to achieve low water and high delivery. " version.

"Liu Niang?" Seeing Xiao Yansui standing in the rain for a while, still bowing her head to draw a picture, Axiu was really worried, and cautiously moved forward, and put the umbrella on top of Xiao Yansui's head.

Xiao Yansui, who already had a general idea in mind, sketched a few more steps in his notebook, finally turned around, wiped the drizzle that seemed to cover his face with a layer of mist, and said directly: "OK Alright, go home."

Axiu immediately breathed a sigh of relief, and when Xiao Yansui returned to the carriage to take off the rain-soaked coir raincoat, she was worried that she would catch a cold in the rain, so she hurriedly handed over hot ginger soup.

Xiao Yansui didn't think much at first, but after smelling the smell of ginger, he opened his eyes slightly and asked in surprise, "It's only been a short while, where did you get it?"

While Axiu was gently wiping the rain on Xiao Yansui's hair with a Juanpa, she couldn't help but read: "Where is it for a while? Since Liu Niang was about to go out in the rain, the servant girl has already sent people to go out." get ready……"

"Actually, my physique is really not that weak." Xiao Yansui didn't feel much repulsion to the spicy taste of ginger, and could even completely treat ginger soup as ginger tea, and slowly took a sip from the cup After that, he said leisurely: "The weather is not cold today, and the rain is not too heavy. Walking in the light rain, it feels very comfortable to be cool. In fact, it is quite poetic."

——The place for walking is not the misty garden, but the field where the soil is digging and farming. There are many farmers who are busy taking advantage of the rain in the field of vision. This scene naturally changes from poetic and picturesque to full of rural flavor. .

Regarding what Xiao Yansui said, Axiu didn't take it seriously after hearing what Xiao Yansui said, and even couldn't help persuading her softly: "If Xianggong knows that Liu Niang was caught in the rain outside today, he must be worried. "

"..." After moving Xiao Song out, Xiao Yansui just smiled and waved his hands without arguing with her. After drinking the ginger soup slowly, he put the cup away, picked up the notebook, and continued to draw water A sketch of the car.

In fact, the waterwheel device can be regarded as a kind of local water conservancy facilities. Moreover, relying on the function of the composite wheel axle, the design pattern is not single, but should be designed according to the terrain, water potential, and even wind potential.

Xiao Yansui held a pen in her hand, rested her chin on one hand, and thought about it seriously.

——According to the principle, she can roughly draw the idea of ​​the design of the wheel axle. However, the waterwheel is an important part of the development of ancient Chinese agriculture. It can be said that even in the middle school history books, it has been Although Xiao Yansui didn't know much about history for the pictures, he still had a little impression of the original pictures of the waterwheel...

Since I have seen pictures of waterwheels from the Ming and Qing Dynasties at the beginning, if there is no accident, the waterwheels that survived and were included in history textbooks must be the ones that are surprisingly designed and relatively reliable. Of course, Xiao Yansui is more inclined to directly refer to the original excellent finished product...

Back in the old house of the Xiao family, just as Xiao Yansui got out of the carriage, she saw the grown-up beagle rushing towards her like a gust of wind, surrounding her with clingy barks.

Xiao Yansui bent down and touched the head of the beagle, because it had been raining in the spring, the smooth and slippery fur on the beagle's body was also soaked a little.

After Xiao Yansui wiped the water droplets on his fur, the beagle simply stood where he was and shook his fur neatly, trying to shake off the water on his body.

Xiao Yansui, who was covered in water like this: "..."

Rubbing the beagle's head again, Xiao Yansui rested his forehead with one hand and said, "Is this because I didn't take it with me when I went out today, so I ran here to take revenge?"

Axiu was stunned watching from the side, but seeing that Xiao Yansui didn't seem to be really angry, she just smiled and said: "The beagle has always been clinging to Liu Niang, but he recognizes the master."

"It seems that it wasn't the one who was still thumping in the lake when I went fishing with Aunt." Xiao Yansui muttered in a low voice, shook her head with a smile, and then said, "I'll go back and change, and find someone to take this little guy with me. Go inside and brush your hair."

A Xiu quickly nodded in agreement.

Xiao Yansui went back to the room. After taking a shower and changing clothes, she came out with her damp hair hanging loose. While wiping her hair, she went directly to the table again, and looked down at herself. A notebook with few things.

After tidying up everything, Xiao Yansui took the umbrella, took the things recorded before, and strolled to Xiao Song's residence.

As soon as Xiao Yansui opened the door and came in, Xiao Song, who was still wearing a pair of reading glasses on the bridge of his nose, lowered his head a little, looked over the reading glasses to look at his granddaughter, and asked with concern: "It's been raining outside, why is that?" The weather is still out."

"Spring rain outing is just interesting." Xiao Yansui said with a casual smile, and then sat down beside Xiao Song.

Xiao Song glanced at Xiao Yansui's rare appearance of not having her hair tied into a loose ponytail, but rather casually letting her long hair loose. If it is said that Xiao Yansui is always simple, straightforward and crisp, then today Her casual appearance seemed to add a rare bit of laziness.

--At least, in the aesthetics of the Tang Dynasty, compared to the ponytail, which is so rare among women that it is almost the only one, and the hair is almost loose, you can more or less meet...

Xiao Song signaled directly to the servant girl, asking her to change Xiao Yansui's hot tea to keep her warm.

Seeing Xiao Yansui, she sat beside her and smiled slightly at her grandfather Xiao Song.

Afterwards, Xiao Song shook his head and said with a smile: "No one at home is holding you back. When can't you go out? Why do you choose such a cloudy and rainy time? Don't talk about enjoying the scenery on a rainy day. In Shanhai Town, if we You can’t even look at the garden at home, and there are probably not many places outside that you can catch your eyes. Going out in the fields to enjoy the scenery, Ah Weng doesn’t believe it.”

Xiao Yansui smiled when he heard the words, and replied with a smile: "I went to see the waterwheel. When it happens to rain, the river water tends to become more turbulent. It is more straightforward to observe."

"Water wheel?" Xiao Song was a little puzzled.

"Well, Ah Weng, I have an idea." Xiao Yansui nodded.

——Whenever Xiao Yansui said that she had an idea, she basically started to toss something completely unexpected.

Xiao Song asked almost subconsciously: "What?"

Xiao Yansui asked without answering, "Ah Weng, do you have a topographical map of Shanhai Town?"

Xiao Song paused, before asking: "What do you want this for?"

Even in later generations when there is a lot of information on the Internet, important topographical maps are still strategic secrets with a high level of confidentiality. In ancient times, when the level of exploration was low, the number of complete topographical maps was extremely rare, so precious The extent and importance are naturally self-evident.Unless it is Xuanzong, important officials in the court and a few generals, more people probably have never been exposed to such things.

Xiao Yansui said frankly: "I need to determine the modification plan of the waterwheel according to the terrain."

"You want to modify the waterwheel?" Xiao Song asked in surprise.

Xiao Yansui nodded, not saying that she also wanted to take the opportunity of modifying the waterwheel to connect the whole house with bamboo pipes, and then simply make a simple version of "tap water".

Xiao Song pondered for a moment, looking at the still warm ground, he already had a clear understanding of his granddaughter's generous efforts in this regard.After thinking about it, Xiao Song finally made a decision, then stood up and said to Xiao Yansui: "Come with me."

Xiao Yansui naturally immediately picked up his notebook and followed.

The grandfather and grandson moved from the main hall to Xiao Song's study. Xiao Yansui watched as grandfather Xiao Song took a box from the museum shelf. After opening it, there was a seal carved from white jade inside.

Xiao Yansui blinked, and then, Xiao Song carefully took out the seal, and then pulled it lightly at an unknown location, and then took out a compartment.

Xiao Yansui didn't even ask Xiao Song how he could just come up with a map of the territory of the Tang Dynasty, especially the detailed topographic map of the area, even though Xiao Song had retired to his hometown for retirement. After Xiao Song helped her find the blueprint Xiao Yansui just sat down in Xiao Song's study, buried her head at the desk, and drew a simple topographic map with a ruler in equal proportions—after all, she just needed to understand the trend of mountains, the shape of rivers, Flow direction, and then ponder the relevant data of the water tanker on this basis, for the too sensitive issue of military deployment, at least for now, I don’t want to delve into it...

Xiao Song didn't seem to know how amazing the things he brought out for his granddaughter were, so he really let Xiao Yansui record the data, and after she quickly drew a very rough imitation, he calmed down He slowly put away the map.

Xiao Yansui was still sketching on the paper, and Xiao Song stood beside her and observed curiously for a while. Although he didn't quite understand, the drawing on the drawing had a basic outline. Compared with the actual waterwheel After matching for a while, Xiao Song couldn't help but said: "Liu Niang, you were looking for books on Mohism's mechanisms. I remember that most of those books also contain such patterns?"

Xiao Yansui nodded, "Yes."

——Although the specific standards will change in each era, to be honest, the essence and core content of the drawings can be said to have been completely inherited for thousands of years.

To put it bluntly, sometimes Xiao Yansui often couldn't understand the classical Chinese in Tang Dynasty's more sophisticated books at the moment, but she could understand many ancient blueprints even though she even guessed.Similarly, if it is a student majoring in Chinese language and literature, it will definitely be difficult for him to read these drawings, but for classical Chinese, he will definitely have some opinions of his own. After all, there is a kind of cultural inheritance and coherence in it. .

"I see." Xiao Song nodded thoughtfully.

Xiao Yansui greeted Xiao Song with the map she had just concocted, and was about to go back to her yard to continue tinkering, but Xiao Song suddenly stopped her.

Xiao Yansui turned her head and asked puzzledly, "Ah Weng?"

"Wang Zhongsi wrote me a letter, in which he mentioned that among the stack of blueprints given to Wang Sili earlier, there was something called 'Fire Kang'." Xiao Song said slowly.

"Oh, that one, I gave it to you." Xiao Yansui replied casually: "The principle of the kang is actually not too different from that of floor heating, but it is not as comfortable as floor heating. However, in winter in the northwest, ordinary people's homes , it should be necessary."

After all, floor heating means that the ground is warm, and then the house is warm, but people still sleep on the bed.

As for the soil kang, or the heated kang, to put it bluntly, when the fire is not burning, it is actually equivalent to sleeping on the ground.It is a good thing to be warmer in winter, but in summer, you must pay special attention to burning a fire every day to remove moisture, otherwise, people will easily get sick if they sleep on it...

Xiao Song nodded. Xiao Yansui mentioned these words when he was rebuilding the courtyard where he lives now. However, Xiao Song never thought that his granddaughter would not think about promoting the "hot kang" in the Jiangnan area. Instead, he directly gave the drawings to Wang Sili.

"Things that can be used will naturally circulate quickly." Xiao Yansui is not in a hurry, especially for things like kangs, which are actually very easy to build. Ordinary people can build houses by themselves. Let's see how If you build it, you can learn it naturally. Some things will bloom everywhere in a subtle way.

Only then did Xiao Song say: "So, since you know what's in your mind, Ah Weng can rest assured."

Xiao Yansui smiled. Although she acted recklessly, she usually stays at home and doesn't try to show her presence outside. Xiao Song also understands her style, otherwise, she wouldn't take it seriously. Just let her mess around.

"There is one more thing, but it has little to do with this." Xiao Song said again: "Wang Zhongsi said in the letter that after he dismissed the post of Hedong Jiedu envoy, he thought it would be Ge Shu, a general under his command. John succeeds, but unexpectedly, the sage also gave the post of Jiedu envoy to An Lushan, making him the new envoy of the three towns..."

Hearing this name, Xiao Yansui was startled suddenly, "Anlu Mountain?"