"Sir, one meter is ten meters, one decimeter is ten centimeter, and one centimeter is ten millimeter. This progress is very simple and easy to understand, but the length unit of my Tang Dynasty is a bit confusing. For example, in the most commonly used steps, some places refer to the distance of one foot, and some places refer to the distance of one foot, although there have been official explanations in all dynasties, it cannot be implemented in various places. Now, my Tang Dynasty has not yet begun to unify the weights and measures, and what we use is still the standard of the former Sui Dynasty. I think the weights and measures mentioned by Mr. are very good and can be copied and used." On the grass in the garden, Li Chengdao suggested to Li Xiu seriously.

"Chengdao, your idea is good, and unified weights and measures are indeed very important. In addition, I also think the decimal weights and measures are very convenient. The length unit of our Tang Dynasty is quite good. Ten is one inch, ten inch is one foot, and ten feet is one zhang. However, in comparison, the weight unit is a bit confusing. For example, twenty-four zhu is one liang, three liang is a big liang, and sixteen liang is a jin. There are multiple carrys in just one unit of weight, which is very inconvenient to calculate."

When he said this, Li Xiu couldn't help but be surprised by the ancient brain circuit. When he later generations calculated the carry of these weight units, he was often dizzy and thrilled. One was a three-way, one was a six-way, and another was a twenty-fourth, which was simply a test of the limit of IQ. However, many Tang people converted very easily, such as Yi Niang and Yue Chan at home, which made Li Xiu feel inferior. At the same time, he also lamented that the nation with the highest IQ in later generations was probably related to this, all of which were trained from ancient times.

However, although the weights and measures of the Tang Dynasty have great shortcomings, Li Chengdao proposed to copy the rice or kilograms that Li Xiu said, there were also great problems. So Li Xiu said again: "Although there are some problems with weights and measures, Chengdao, you should also know that the essence of the use of weights and measures is still a habitual problem. All parts of the Tang Dynasty were used to using local weights and measures. Even if the court wanted to unify the weights and measures, it was not easy for the court to copy a completely unfamiliar weights and measures. Do you think the people would accept it?"

"This..." Li Chengdao couldn't help but show a contemplative expression when he heard this. He had never considered this issue. He just thought that the weights and measures mentioned by Li Xiu were very convenient and practical, so he wanted to copy them, but he did not consider the difficulties in implementing it.

Seeing Li Chengdao fall into deep thought, Li Xiu smiled and did not disturb him. Li Chengdao is mature far beyond the age of children, but sometimes he still exposes some shortcomings that are too naive and childish. This cannot be blamed for him. After all, he is still too young. Only after having enough experience will he truly mature.

"Sir, do you think I wrote the ten numbers correctly?" At this moment, a timid voice suddenly heard a timid voice. When Li Xiu turned around, he immediately saw Hener holding a piece of paper and looking at him with wide eyes. She was in class on the first day, and Li Xiu taught her to practice ten Arabic numerals.

Seeing Hen'er's timid look, Li Xiu smiled gently at her, then took the paper and looked at it, and then praised: "Yes, it's written neatly. Now I'll teach you some simple rules for using numbers..."

I just discussed with Li Chengdao about the issue of overweight and weights and measures that affect the national system, and then Li Xiu had to start with the most basic numbers. Li Xiu had long been used to such a large span. After all, the learning progress of these children was different. Li Chengdao and Qi Niang learned the fastest, while Xiaoya and Li Chengqian were a little worse. As for Hener, they were even worse. They could only start with the most basic ones. Fortunately, Qi Niang had already previewed some for her yesterday, and Hener was also very smart, so it was not difficult to learn.

After giving Hen'er, Li Xiu hurriedly turned around to teach Li Chengqian and Xiao Ya. Although each student's progress was different, he had to worry about it in five parts, but as long as he got used to it, it was nothing. Moreover, the courses he arranged were very easy. He only taught one class a day by one person. It was not that he was lazy, but that he could only teach what he learned in later schools at most to junior high school. Almost all the things he learned later were returned to the school, so he couldn't teach it even if he wanted to.

However, just as Li Xiu was giving a lecture, Yue Chan suddenly ran over and reported to Li Xiu: "Master, there is a guest in front of you, saying that there is something important to see you!"

"Guest?" Li Xiu couldn't help but be surprised when he heard this, and asked immediately, "What kind of guest is it? Have you been here before?"

"I've been here. Last time, Master, have you been entertained by many court officials? I remember this guest is one of those people, but I don't remember his name." Yuechan thought for a while and replied. The day she said it was after Li Xiu and Princess Pingyang presented sweet potatoes and corn to the court. Many officials came to watch these two high-yield crops, and then Li Xiu treated these people at home.

"The official who came that day, is he a middle-aged man with a national face?" Li Xiu recalled first, and then immediately guessed that someone was the only reason to come to find him.

"Yes, this guest has been stern since he came in, as if he couldn't smile, and I didn't dare to ask too much." Yuechan nodded immediately when she heard Li Xiu's words. When she faced the guest just now, she felt very stressed, so she escaped from the living room without asking about the other party's identity.

"It's really him." Li Xiu also showed a helpless expression when he heard this, and then explained to Yuechan, "This guest is named Wei Zheng, who is the first to be the crown prince Xian Ma, and a senior official of the third rank may come often in the future. Yuechan, please don't be too slow."

Yue Chan was also a little surprised to hear that the other party was actually a senior official of the third rank. You should know that the six ministers were only a third rank, but then she calmed down. With her own status as a master, it was normal for officials who were in the third rank.

At that moment, Li Xiu asked Li Chengdao and others to study by themselves, and then he strode to the front hall. As soon as he entered, he immediately saw Wei Zheng sitting upright, drinking tea with a stern face. There was no joy or anger on his face. It looked like a human face carved from a stone, which was daunting. No wonder Li Shimin would have a headache about him in the future.

"Goodbye to Wei Xima!" Although he was a little afraid of Wei Zheng, Li Xiu still gritted his teeth and went forward.

To Li Xiu's surprise, when Wei Zheng saw him, a smile appeared on his face like a rock, and said politely: "Li Jijiu doesn't have to be too polite. I came here today to talk to Li Jijiu for official business!"

Wei Zheng said that, taking out an imperial edict from his arms and handing it over to Li Xiu, which made Li Xiu a little strange. He opened it and looked at it, and found that this was an appointment, mainly that Wei Zheng was responsible for the promotion of corn and sweet potatoes. If necessary, other officials would also help him. This made Li Xiu a little helpless. He made a decision yesterday, and the imperial edict was released today. What's worse is that Wei Zheng came immediately. It seems that he can't think of leisure.

Sure enough, after Li Xiu finished reading the imperial edict, Wei Zheng immediately spoke: "Li Jijiu, I won't say much about gossip. Li Jijiu needs strong assistance in promoting corn and sweet potatoes. Today I brought a few relevant officials to count the number of corn and sweet potatoes, as well as the growth conditions, etc., and please ask Li Jijiu to introduce it to us!"

"No problem. If Wei Xima has time now, I can take you there immediately!" Li Xiu nodded immediately. He knew that people like Wei Zheng didn't like politeness, so he didn't say nonsense and agreed to take them there directly.

Wei Zheng seemed to admire Li Xiu's decisive behavior very much. He stood up with a smile and left the living room together. When Li Xiu left the gate, he found that there were several officials of different ages standing outside. Needless to ask, these officials must be Wei Zheng's assistants to promote high-yield crops.

At that moment, Li Xiu took Wei Zheng and others to the corn field first, and then introduced them to the growth of corn. It is expected that this batch of corn will be harvested in autumn. However, what Li Xiu did not expect was that after Wei Zheng came to the corn field, he waved his hand, and several officials he brought immediately stepped forward and counted the corn, measured the land and wrote calculations on paper, which was probably calculating the approximate amount of corn.

"Wei Xima, is it necessary to calculate it so clearly?" Li Xiu asked in surprise when he saw this. In addition, he found that these officials actually used Arabic numerals when checking the calculations on paper. It seemed that Li Chunfeng's book "Li Chunfeng's Arithmetic" was promoted well among officials, but it had reached the practical stage.

"It is necessary. Although Li Jijiu had already provided a yield per mu when he harvested corn last time, I believe that it was under the careful care of Li Jijiu, and the yield per mu would be higher, so it needs to be recalculated. In addition, the growth of these corns also needs to be observed and recorded in detail. In the future, these officials will come every day. In order to facilitate them, they will temporarily live in nearby farmers' homes!" Wei Zheng replied with a stern look.

When Li Xiu heard this, he couldn't help but feel sympathy for the officials under Wei Zheng. With such a boss, they would suffer in the future. But what's strange is that these people are all full of energy, which really makes people wonder what they are thinking?

Calculated the approximate amount of corn and how many corn seedlings can be accommodated per mu. Then Wei Zheng asked Li Xiu about the things that need to be paid attention to when farming corn, such as watering, fertilization, etc. Li Xiu didn't understand these, but after planting corn for a year, Liu and his friends summarized some of them. In addition, Li Xiu's previous experience in his previous life, he could tell them very well.

Li Xiu said while saying that Wei Zheng was also writing down. In the words of later generations, these are the most precious first-hand information and play an extremely important role in promoting corn planting in the future. Otherwise, if the corn is released, it will reduce yield or even lose harvest because it does not know how to cultivate it, it will definitely greatly damage the people's confidence in growing corn.

After Li Xiu finished speaking, Wei Zheng asked to see the sweet potatoes again. Li Xiu had to take them to the sweet potato field again. In fact, it was the greenhouse next to Princess Pingyang's villa. However, when he was walking there, he suddenly saw Wei Zheng walking beside him suddenly said, "Li Jijiu, I heard that you have a good relationship with Yang Nong and Yang Shangshu?"

"Uh? Wei Xima said this?" Li Xiu was stunned when he heard Wei Zheng's words. Although he had met Yang Nong, he probably couldn't have any friendship.

"Haha, Yang Shangshu originally wanted to be responsible for promoting corn and sweet potatoes. His first memorial said that he had received the support of Li Jijiu and said that he had a great conversation with Li Jijiu. It sounded like you should have a good relationship?" Wei Zheng smiled at this time, but his rocky face seemed really not suitable for laughing. No matter what smile looked particularly stiff on his face.

"This... I'm afraid Wei Xima misunderstood. I only met Yang Shangshu once. The last time you met when you visited corn and sweet potatoes together, it was really not a question of friendship." Li Xiu hesitated. He and Yang Nong did not have a relationship, but he sympathized with Yang Nong now. He didn't know how this old man was doing now. If he had time, he could go and visit him.

"So that's it, but Shangshu Yang highly praised Li Jijiu. In fact, I admire Li Jijiu very much. Not to mention anything else, when calculating corn yield just now, I used the math science that Li Jijiu passed on, which was very convenient and fast."

Wei Zheng was rare to praise others, which made Li Xiu feel flattered, but then Wei Zheng changed the topic and said, "But Yang Shangshu's selfishness is too strong, and I am worried that he is too old and cannot be competent for the important task of promoting corn and sweet potatoes, so he took the initiative to fight for it. However, Yang Shangshu couldn't afford to get sick because of this, and I felt guilty, but I thought of a solution."

"Oh? What's the solution?" Li Xiu couldn't help but look at Wei Zhengdao in surprise when he heard this.

"Actually, it's very simple. Sweet potatoes and corn are related to the welfare of the people in the world. I can't be competent by myself. I need more people to help, especially the Ministry of Revenue. If Yang Shangshu is willing, I hope he can be my deputy and promote these two high-yield crops with me!" Wei Zheng said seriously again.

He stole someone's errands and now he wants to be his own deputy. If others say this, it is likely that people will think that this guy is humiliating the loser. However, the same words spoken by Wei Zheng will not feel like this. Li Xiu kept staring at Wei Zheng's eyes, but he only saw sincerity in his eyes. First, he really needs the assistance of the Ministry of Revenue, and Yang Shangshu will definitely not be able to get around that level. Second, he does not want to really make Yang Shangshu angry, so he wants to give the credit to the other party.

Thinking of the above, Li Xiu finally spoke slowly: "Wei Xima's idea is good, but I am worried that Shangshu Yang will not accept it."

"Yes, I have such concerns, so I want to invite Li Jijiu to visit Yang Shangshu with me. I believe Li Jijiu will definitely convince Li Jijiu!" Wei Zheng finally expressed his plans at this time.

"Me? This..." Li Xiu was stunned when he heard this, and then he couldn't help but smile bitterly. Wei Zheng really knows how to find someone, this is not a good job.

"Huh? What is that?" Just as Li Xiu was smiling bitterly, Wei Zheng suddenly pointed to Tian Di next to him and asked in surprise. (To be continued.)
Chapter completed!