"Big brother... Eldest brother...! ”

Li Chengqian shouted Li Zhan twice, Li Zhan was gritting his teeth at Zheng Qian at this time, Li Chengqian shouted twice, and Li Zhan came back to his senses and said: "What...?" ”

At this time, Li Chengqian's head drooped and said, "Big brother... I feel a little ashamed of my father, who believes in me so much, and I can't help him with anything? ”

Looking at Li Chengqian's suddenly listless little appearance, Li Zhan smiled: "If you have something, just say it, don't pretend to be distressed here, you know, I don't like it." ”

"Hee-hee...!" Li Chengqian smiled.

And seeing Li Chengqian's smile here at this time, the little bean on the side was slightly shocked, maybe he could only see Li Chengqian's innocent smile here in Li Zhan in his life, even in the eldest grandson queen, Li Chengqian had never smiled like this.

Because even in the eyes of Empress Changsun, Li Chengqian is more of a prince than his own son.

Seeing Li Chengqian laughing, Li Zhan also laughed and said, "If you have something to say, say it quickly, what problems has your father encountered again?" ”

"Hmm...!" Li Chengqian said: "It is the problem of plowing the fields, and now the time for sowing is about to pass, but because our army is still fighting in Tuguhun, the strong labor is not in Guanzhong."

In that case, the speed of plowing the field will be much slower, and in the past two days, Si Tianjian said that there will be a heavy rainstorm, and it will continue for a period of time, in that case, there will be no way to plow the field, and the father originally wanted to ask the family to rent ploughing oxen to speed up the ploughing speed.

But those families actually said that they would not rent but only sell, and that a ploughing cow would cost a hundred times, saying that their cattle were well fed and fed, and that there was a sound of silk and bamboo when they slept, and my father was really mad. ”

"Humph...!" With a cold snort, Li Zhan said hatefully: "These families are really too rampant. ”

"It's just..." Li Chengqian echoed: "Later, my father and the emperor allocated another 500,000 yuan to buy cattle, but everyone knows that far water can't quench the thirst of the near, and when the cattle are bought and transported back, I think the rainstorm will come, so eldest brother, I want to ask you, is there any way to help my father." ”

"Huh...!" Li Zhan looked at Li Chengqian and smiled, "You... I really found the right person this time. ”

"Big brother has a way?" Li Chengqian was a surprise.

Li Zhan smiled and nodded: "Actually, I prepared something a long time ago, but I forgot to tell you, and when you talk about it today, I will remember it, but... I'll give you this, you're going to do me a favor. ”

"Haha...!" Li Chengqian said with a smile: "Even if the eldest brother doesn't give me anything, I will help the eldest brother, if you want to kill Zheng Jin, I can't wait, if his Zheng family dares to frame the eldest brother, I will kill him Zheng Jiazi." ”

"Poof...!" Li Zhan waved his hand again and again and smiled: "Why do you think like this... I know, killing people is very simple, but the follow-up is a troublesome matter, the matter between me and the Zheng family, you give me a side, and I will deal with it. ”

"But big brother... Those bastards are so rampant, I have the Tiger Sword in my hand, I can directly kill that Zheng Jin! Li Chengqian looked at Li Zhan seriously.

Li Zhan continued to laugh and said, "I know... However, Zheng Jin, I'll do it myself, right...! Li Zhan looked at the little bean next to him and said, "Little bean...!" ”

"The slave is here...!" Little Beanzi immediately bowed down and replied.

"You go to the window and bring the second wooden box...!"

"Yes...!"

Xiaodouzi walked to the window, and carefully took the wooden box to Li Zhan and Li Chengqian, at this time, Li Chengqian immediately asked: "Big brother... That's the good stuff you're going to give me? ”

"That's right...!" Li Zhan opened the wooden box and said with a smile: "It's called Quyuan Plow...!" ”

"Quyuan plow...?" Li Chengqian looked at Li Zhan's open paper in surprise and asked, "Big brother... What is this curved plough for? ”

Li Zhan looked at Li Chengqian and frowned and said: "I'll let you go to the farmland to have a look, you don't have to guess to know, you shouldn't have gone, otherwise, you can see the difference between the curved plow and the long straight plow at a glance." ”

"Huh...!" Li Chengqian said a little embarrassed: "During this period, the masters of the East Palace really annoyed me to death, so...!" ”

The latter words, Li Zhan knows without guessing, this is to let himself explain.

Helpless... Li Zhan had no choice but to say: "Listen carefully, the plough we use now is called the Changzhiyuan plow, what about it... When ploughing the land, it is not flexible enough to turn around, the soil is laborious, the efficiency is not very high, and it is difficult to move forward without ploughing oxen.

However, the curved plough I designed has several major improvements over the previous plough. First of all, the straight wheel, the long wheel is changed to the curved wheel, the short wheel, and the plow disc that can rotate freely is installed at the head of the wheel, so that not only the plow frame becomes smaller and lighter, but also is convenient to turn around and turn, the operation is flexible, and the manpower and livestock are saved.

With it... For example, if you can plough ten acres a day, you can now plough fifty acres, and you can reduce manpower and animal power, so as long as the imperial court makes all its efforts, I think it is still possible to plow all the fields before the storm comes. ”

"Wow... It's really great... Big brother, I knew that you could do anything. Li Chengqian was surprised, picked up the drawing of Quyuan plough and looked at it vigorously, but he looked at it for a long time, and he couldn't figure out how the drawing looked.

Li Zhan smiled and said, "After you wait to present the drawings, you will help me do something...!" ”

"Of course there is no problem, big brother, what do you want me to do?" Li Chengqian asked without hesitation.

"You help me find these things...!" After speaking, Li Zhan handed Li Chengqian a piece of paper, and after Li Chengqian took it, he saw that it was written: limestone, clay, iron ore and coal! (Note: Limestone 4,000 years ago in the Qijia cultural sites in the upper reaches of the Yellow River, there was already lime burned with lime Wenyan, and the earliest record of lime in the "Zhou Li", in which the lime was burned with oyster shells.)

Most of the ancient lime production processes are to lay limestone and wood in layers, and calcinate them for a week. Lime is the earliest cementitious material used by humans.)

Li Chengqian was a little puzzled and said, "Big brother... What do you want these things for? ”

"I'm going to make a material that can be used in construction, water conservancy, roads, and military engineering... Anyway, you don't have to worry about it, just get it for me. Li Zhan smiled slightly.

"Yes...!" Li Chengqian smiled: "No matter what the eldest brother asks me to do, I will do it." ”

Looking at what Li Chengqian said categorically, Li Zhan felt that this younger brother really didn't admit it in vain, and then smiled: "Okay... You hurry up and plow the Quyuan first, or the same as before, don't talk about me, just say that it's yours, hey...! ”

Speaking of this, Li Zhan sighed.

"What's wrong, big brother...?" Li Chengqian was surprised.

Li Zhan shook his head slightly and said, "It's nothing... I just feel like I'm a bit of a thief, but, forget it... Let's go as it was before. ”

"Oh...!" Li Chengqian nodded again and again, he didn't know what his eldest brother's sigh just now meant.

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