"Lord Lidian, this year's summer grain tax has been collected in advance, do you think you can pay the grain tax to the county seat?" Chen Xu rode to the granary, and Niu Quan, who managed the granary, immediately greeted him and asked.

There are more than 4,000 stones of these grains, which are converted into the weight of the next generation and are close to thirteen tons, and a truck can easily pull them away, but in this era, it is completely a huge number, if you go to the county seat manually, it will take two hundred and fifty or sixty people to pick fifty kilograms per person, and there are not so many young and middle-aged people in the entire Qinghe Town.

Therefore, it is impossible to pick, but there are already cars in this era, although they are still very rough, and the wooden wheels are not too compression-resistant, but they are also cars, and there is no big problem with pulling two or three hundred kilograms in a car.

And in any case, it is good news that the summer grain tax Qi did not make any trouble, so Chen Xu gathered a few people and began to go to the town to collect cattle, horses, mules and carts.

In this era of unusually backward industry, building a car is also a very difficult work with high technical difficulty, the carpenters in the town will build, but the cost is too high, the axle and the run-in part of the socket are made of fine copper, the axle has to be close to five hundred dollars, and the wheel hub must also use the best dry old wood, natural air drying for several years, after the production has to be repeatedly soaked in tung oil, to make a car completely for several years, not rich people simply can't afford to sell.

Therefore, there were more than 300 households in Qinghe Town, and only 23 cars were found in the end.

It's like the cars that were able to sell in the towns and villages in the nineties, and these people are definitely the rich people of today.

However, it is useless for rich people to meet powerful people, Chen Xu gave an order, and the twenty-three cars were obediently pulled to the grain warehouse by the owner with cows, horses, and mules.

However, Chen Xu did not use the car in vain, he said that he would repair it if it was broken, and after paying all the taxes and grain, each family would compensate one stone of grain.

In addition to driving, there are nearly sixty cows, horses, mules and donkeys, as long as the whole town can camel all the livestock have been temporarily requisitioned by him, if pigs, sheep, chickens and dogs can also camel things, it is estimated that he will also unceremoniously requisition.

Dozens of people began to count and load the truck under the command of Niu Quan, and they were busy for nearly an hour, and after the loading was checked repeatedly, Chen Xu signed and drew a charge, totaling nearly 400 stone tax and grain, escorted by the tour and three pavilion chiefs and fifty soldiers recruited by the town, and went to the county seat.

This is only fifty miles to the county seat, although most of them are mountain roads, but the road conditions are relatively good, if nothing else, it should be reached within two hours, it used to be the case every year, and there was no difference, so Chen Xu didn't pay too much attention to it.

However, this efficiency is too low, and in this way, it takes more than ten days to get more than 4,000 stones of grain.

Watching the cows, horses, mules, donkeys and the convoy creak away, Chen Xu breathed a sigh of relief and had a headache at the same time.

Fortunately, the deadline for paying taxes is more than a month, and it is not too far.

Four days passed.

The process of paying taxes and grains is really not the slightest fork, although it is slow, but the grain in the warehouse is also decreasing, which makes Niu Quan's mood relax a lot, you must know that the grain is in the granary, so it is his responsibility to lose the fire, thousands of stones of grain are gone, and he can't afford to grind him into powder, so he can only keep urging every day.

And Chen Xu's mood has been very relaxed and happy in the past two days.

Paying taxes and grain is only one of them, mainly the good news from the paper workshop, some of the semi-dry paper dried on the bamboo sieve can be completely removed, so the two days to step up the production of hundreds of sheets, has been all spread on the pottery board to dry, now stacked together with a slate press, it is estimated that it will be used in a few days.

Therefore, he rode a horse and hummed a little song to the primary school leisurely.

This morning he is going to give a simple physics lesson to his students.

And a group of half-grown children about ten years old have been waiting in the classroom for a long time.

Some people dozed off in literacy class, more dozed off in math class, and as for abacus class, every time someone was swollen by Niu Quan with a ruler on the back of his hand, Chen Xu took the time to listen to the class twice, and found that there was almost no difference from the students and teachers in later generations.

The area of the classroom is about 30 square meters, because the construction is very hasty, the rammed earth ground is not only damp, but also potholes are not very smooth, because they are all kneeling, so there are no stools and chairs, they are all spread on the ground with a broken palm mat or a grass mat, the desk is also two stones and a wood, the bamboo slips and brushes are very rough, and the ink is also made of carbon ash and water, basically everything is in the most simple and primitive state.

And a group of students' favorite is Chen Xu to come to the lecture, although he has only taken two classes, but it is easy and interesting, so when Chen Xu lectures, not only the students like it, but even Old Master Chen will sit in the back and listen to the lecture with great interest, Niu Quan is naturally there, and Yu Wuya is directly the same as other students, respectfully sitting behind a desk, with a serious attitude and a respectful expression.

Because only he knows, Chen Xu is talking about the content of the three volumes of the Book of Heaven, and these knowledge have an immortal aura, and if you learn some of them, you may become an immortal one day.

Chen Xu walked to the podium, picked up a teaching stick made of green bamboo, knocked lightly on the wooden table, and said, "Today I will tell you about friction. ”

The noisy children immediately quieted down and sat down with wide eyes.

Chen Xu was very satisfied, coughed and started talking, "Friction is a universal force, its principle is the resistance generated by the interaction of two different objects, what is the object, the object is simply something we see or can't see, such as wood, stone, water, ice, and even wind, etc., for example, when we walk, if there is no friction, we can't control our feet at all, after the rain the ground is very slippery, then the friction will be reduced, what will happen after the reduction?" ”

"Wet your shoes!"

"Stain your clothes!"

"Can wrestle~"

A group of children began to shout excitedly.

Chen Xu pointed at a child with a bamboo stick in his hand and said, "Yes, the slippery ground is the easiest to fall, and only when you fall will you get your clothes dirty, what will happen then?" ”

All the children began to think, even Yu Wuya, Chen Lao and Niu all began to think about what would happen if they got their clothes dirty.

"If you get your clothes dirty, you'll be beaten, and when you go back, your parents will spank them with sticks, right?" Chen Xu said with a smile.

"Yes~" a group of children shouted loudly and laughed loudly.

"Of course, there is one of the oldest legends about friction, do you know the story of the Suiren clan drilling wood to make fire?"

"I don't know~"

"Okay, I'll tell you the story of the Suiren clan drilling wood to make fire today......