"Brother, why is this side of your face swollen?" Li Zhang went to Xu Ping's side, looked at him and asked in a low voice. Pen, fun, pavilion www. biquge。 info

Xu Ping touched his face and said helplessly: "I have a tooth recently, and I don't know what happened, it has been swollen in the past two days." ”

"It's been a few months since your end tooth grows, why can't you finish tossing! Brother, like this, I advise you to find a good Langzhong to take a look. Several imperial doctors in the palace really have the means. ”

Xu Ping nodded: "When I finish my official business today, I will go to Lang Zhong to have a look." ”

With Xu Ping's current identity, the imperial doctor also wants to confront him, and he is not worried about not being able to find a good doctor. But Xu Ping didn't know in his heart whether the imperial doctor's methods could cure his teeth. The key to curing his disease is to be ruthless and pull out the troublesome tooth for a hundred times. But the imperial doctor treats the people in the palace, and he is used to being cautious, but he is afraid that he does not have the courage. But if you don't look for famous doctors like imperial doctors, Xu Ping himself won't dare to look for them in the street procession.

While gossiping with Li Zhang, he entered the inner hall and walked towards the Chongzheng Palace.

Today is the day when Xu Ping and Wang Yan reported to go out to inspect the river, and several ministers and the three envoys of the imperial history were all there, wanting to make a final conclusion on this matter. The dispute between Xu Ping and Wang Yan, who is right and who is wrong, will also be revealed today. It's been a long time since things have been tossed around, and it's time for an end.

But since he returned to the capital, Xu Ping's end tooth made trouble again, and I don't know where the stimulation was, and inflammation in the mouth started. Xu Ping looked in the mirror at home, and the end of his mouth was swollen like a bun, and it hurt when he touched it lightly with his hand. In the past two days, I didn't dare to eat hot food, I didn't dare to eat cold food, and I didn't even dare to eat hard meals, so I could only rely on drinking porridge to survive. That is, now that his parents, wife and children are not in the capital, Xu Ping has a big heart, so he resists day by day, and waits for the day when the inflammation is eliminated.

When I arrived at the Chongzheng Palace, I saluted like a ritual, and when I entered the hall, I saw that Wang Yan and others had already arrived.

Zhao Zhen above still gave the seat as usual, and gave tea soup down. Where did Xu Ping dare to put the hot tea soup in his mouth? The emperor couldn't push it to the side, so he endured the discomfort and took a sip, his brain was already buzzing.

Fortunately, the light in the Chongzheng Hall was not good, and others couldn't see the change in Xu Ping's expression, but the little yellow door who was waiting on the side saw Xu Ping grinning and knew that he was afraid that he was not feeling well, so he obediently withdrew immediately.

After withdrawing the tea soup, Zhao Zhencai said loudly: "Before January, Guo Zheng, the judge of the Third Division of Salt and Iron, proposed to dig a canal to divert Luo water into the Bianhe River, instead of Biankou, which diverted water from the Yellow River. The edict ordered Xu Ping, the deputy envoy of Yantie, and Wang Yan, the deputy envoy of the household department, to go to investigate, and recently returned to Beijing to resume his life. National affairs, I don't dare to be self-dictatorated, the two of them report separately, and the minister will consider! ”

The people received the decree together.

Lu Yijian, who was seated, said: "Xu Ping, you are the envoy of this trip, whether the canal should be opened or not, come forward and explain in detail." ”

Xu Ping got up, saluted, and said: "Your Majesty, Xianggong, the geography of the place where the canal was dug is complicated, and I am afraid that it will be difficult to explain clearly. I have a sand table here, it looks more clear, please say to the sand table. ”

Zhao Zhen was allowed and asked Xiao Huangmen to take the sand table that Xu Ping put outside the hall and came in.

Xu Ping didn't want to be so troublesome, but this time, Wang Yan and himself died, and he didn't dare to be careless, so he urgently made this sand table in the second half. In order to be in a hurry, the sand table is made of cement, which shows the terrain from Biankou, south of the Yellow River and north of Songshan Mountain, and the area along the Yellow River is particularly exquisitely made.

Uncovering the silk cloth covered on the sand table, Xu Ping said: "Look, this is the terrain from Biankou up to the mouth of the Luoshui River, and the mountains, rivers, hills, and hills are all in it. Different lots, whether the ground is rocky or sandy, are clearly marked with different colors. The darker the color, the harder the underground and the more difficult it is to excavate, and the lighter the color, the easier it is to excavate. The Songshan Mountain south of Suoshui and Suoshui has nothing to do with the excavation of the canal, so it is not colored, and there is no need to care. ”

Lu Yijian and Wang Zeng glanced at each other, every time Xu Ping talked about this kind of serious matter, he always had to come up with some strange tricks. What a whole bunch of diagrams, drawing on the blackboard, this time even the sand table was moved out. These methods are really troublesome, but they are also really clear and easy to understand. To tell the truth, although several of the people here have been officials in the court for many years, few people understand these professional knowledge. Just by talking, it's probably great to be able to listen to it, how can you really distinguish the pros and cons? In doing so, the benefits are also obvious.

Zhao Zhen was on it, stretched his neck and looked at it for a while, where can he see it clearly when he is far away? He simply stood up and said to the ministers seated, "You all should get up and see more clearly when you go to the front." ”

Lu Yijian and Wang Zeng had already known that this would be the result, and after listening to Zhao Zhen's words, they stood up with their ministers.

When I arrived at the sand table, I saw that the sand table was made very exquisitely, not only lifelike, the colors were distinct, but also there was a benchmark on the edge of the sand table.

Mei Xun looked at it for a while, and asked Xu Ping, who was standing on the side: "Xu waiting, what are these two benchmarks for?" Why are there only a few lines engraved on it? Is it possible to mark the mileage or not? ”

"Back to the bachelor, that's what you use to mark miles. A small grid on this benchmark is a mile, and the entire sand table is made in this proportion. A small grid of flat is a mile of flat land, and a small grid of hard is a mile high. ”

Mei Xun looked at Yan Shu beside him and laughed, and said, "Could it be that your sand table is really the same as the actual geography?" The distance above this, the mountains are high and the mountains are low, and you can see it at a glance? ”

Xu Ping nodded: "Exactly!" ”

Hearing this, the faces of the people around him changed, and their expressions couldn't help but become solemn. This sand table turned out to be more than just a gesture, but it was actually made according to the proportions. Not to mention how well the river is surveyed, it is very remarkable to bother to make such a sand table. China has long had a drum car, and the miles on the flat ground are easy to calculate, but the height of the mountain is not easy to measure. Don't look at the "Classic of Mountains and Seas" to say which mountain is how high it is, but to really measure the height of a mountain is not something that anyone can do.

Xu Ping didn't prepare for this beforehand, he didn't have special tools, and no matter how careful he was, it was actually very rough. The benchmark he took was the water surface of the Yellow River, and there is a height difference between the upper and lower reaches of the Yellow River, and the earth is round, so it will naturally have the influence of curvature.

There are no optical instruments, purely relying on the method of pulling the rope with a pole, and then measuring the angle to calculate, so that we can only take as few landmark points as possible, and most of them still rely on estimation.

Either way, this is the most detailed three-dimensional topographic map of this era.

(I couldn't sleep before, but now I can't wake up, and I've been in a daze for nearly 40 hours, and I still feel dizzy...... (To be continued.) )