Although Meng Sheng and Zu Chongzhi have only known each other for three days, they are "smelly" in the eyes of others, and they have been inseparable for a long time.

"Meng Sheng, the shape of your catapult is not bad, but the efficiency of these shafts is too low, and a fixed pulley should be added here, so that at least the catapult distance can be increased by one percent."

Zu Chongzhi pointed to the drawings and said.

"Fixed pulley? What's that? ”

This drawing is the design of his teacher's public loss class, which is already impeccable in Meng Sheng's eyes, but in Zu Chongzhi's eyes, it is all faulty, which makes him very unconvinced, but this Zu Chongzhi's mouth is full of words that he doesn't understand, so he can't refute it.

"This fixed pulley is a part made using the principle of lever, do you know the principle of lever?"

"How leverage works? I don't understand! ”

Meng Sheng shook his head repeatedly.

"It's really ignorant, I'll show you."

Zu Chongzhi used a wooden board and a stone to simply build a seesaw.

"You're standing there!"

Zu Chongzhi gestured for Meng Sheng to stand at the end of the plank.

"How many pounds do you weigh?"

Zu Chongzhi asked.

"About one hundred and sixty pounds!"

Meng Sheng has been practicing martial arts since he was a child, and he is strong in front of him.

"How much do you think I weigh?"

"You, you're a sick man, it's good to have one hundred and twenty pounds!"

Zu Chongzhi is soft and weak, he doesn't have a single muscle on his body, he doesn't even eat when he studies his knowledge, and his body is naturally very thin.

"Believe it or not, I can lift you up with one hand!"

Zu Chongzhi pursed his lips and said.

"You're talking nonsense, if you want to say that it's the prince, I still believe it, just you, you can't move the two."

Of course, Meng Sheng didn't believe it.

"Okay, look!"

Zu Chongzhi pressed hard with one hand on the other end of the board, and as a result, Meng Sheng on the other end was slowly lifted up by the board.

"The strength is almost, then my hands!"

Zu Chongzhi's hands came up and pressed down hard again, and this time Meng Sheng was lifted several feet high by the plank.

"See? That's leverage, a plank can lift you up with someone like me! ”

"That's leverage? I know that, too! ”

This kind of manifestation Meng Sheng often encounters in his life, for example, if he wants to move a boulder, if the human power cannot do it, he will also set up a wooden plank of the same structure underneath, and he can move the boulder with a strong press, but this is not strange, Meng Sheng has never thought about it further.

"You know? You know it's just the simplest leverage, you haven't seen me on a pulley, and the same is true for a moving pulley, that's what I'm capable of! ”

Zu Chongzhi said proudly, he was like an ignorant child in front of Liu Yuetian, and others ignored him, and now it was difficult to find someone who was more "ignorant" than himself, so his confidence increased greatly.

"Fixed pulley moving pulley? Come, tell me about it! ”

Meng Sheng also came to be interested, if it is really as Zu Chongzhi said, it can be applied in many devices, it is undoubtedly an improvement.

"No problem, no problem, not only the principle of leverage, I also have three laws of motion here, as long as you want to learn, I can tell you!"

finally has a person who can understand his knowledge, Zu Chongzhi seems to have met a bosom friend, and he is really endless.

Fang Xuanling and Sun Chi also learned about the people's situation in the city, and in just two days, they traveled all over Tianshui City and had a comprehensive understanding of Tianshui's policies.

"The lord is really generous, exempt from agricultural tax for three years, only 20% after three years, and only 20% of the commercial tax, we now have more than 500,000 acres of farmland in Tianshui, so we will collect hundreds of thousands of silver less a year, so how can our army feed?"

Fang Xuanling asked.

"Hehe, Brother Fang, don't worry, our lord is a god, he has special farmland near Wubao, these farmlands are not ordinary grains, each plant can produce ten buckets of white rice, growing six seasons a year, relying on these grains is enough to feed tens of thousands of troops, so there is no need for ordinary people to feed us at all!"

The two of them sat on their horses and came to the front of the dock fort, which had been completely built, covering an area of hundreds of acres, surrounded by two thousand soldiers, and outside there were large patches of grain, each rice plant was more than six feet high, like a small tree, and the ears of wheat that grew on it were thicker than Fang Xuanling's arms.

"This is rice?"

Fang Xuanling couldn't believe it at all.

"Hehe, of course it's rice, six seasons a year, one plant and ten buckets, Brother Fang hasn't seen it, don't say it's you, if you haven't seen it with your own eyes, who will believe it's true? The lord said that these rice varieties are all new varieties, do you believe it? I don't believe it anyway. ”

Sun Chi said with a smile.

"I don't believe it, either......... I'm afraid of planting rice, I'm afraid that only the gods have it! ”

"Haha, I think so too, people all day long think so, so it's right to follow the lord, that's our blessing!"

Sun Chi's loyalty to Liu Yuetian has now reached more than eighty, and he basically worships Liu Yuetian almost fanatically, not only him, but also Zhang Xingsan, Xiao Luzi, Shi Le, and Liu Yuetian's earliest group of tenant farmers have more than eighty loyalty, and Liu Yuetian is a god in their hearts.

"Your Royal Highness, now Tianshui's policies have been very good, there is no agricultural tax for three years, and the agricultural tax is only 20% after three years, so calculated, the farmers have a balance of ten taels of silver a year, and we are responsible for providing for the elderly who have no ability to work, and the burden on adults is less, although it seems that the enthusiasm of the people is high now, but I am afraid that there will be problems after a long time."

Fang Xuanling said to Liu Yuetian.

"Oh? Brother Fang, why? ”

"Your Royal Highness, we scholars, no matter how insignificant it is now, but we have a lofty goal in our hearts, that is, to rely on what we have learned to make contributions, the three princes and nine kings are not big, and the king and the prime minister dare to think, relying on this dream, we will continue to progress, but the people don't think much, they are for eating, and then marrying and having children, as long as they can eat and dress warmly, most people will not be enterprising, of course, if the world is like this, it is the world of peace, but we can't do it, We Tianshui will develop in a short period of time and become rich and rich, if they all have this kind of thinking, it will not be possible! ”

"Well, that's right, the people's knowledge is indeed not as profound as ours, so I am ready to prepare a school for them to receive education."

"Education is indeed a target, but it takes time, and it won't be effective in five or eight years, but I have a suggestion to get them all to act."

"What advice? Let's hear it. ”

Liu Yuetian became interested.