Convincing Al-Hassen was not an easy task, and it would have been difficult for him to change his mind if it weren't for the fact that Al-Hassen's research had reached a bottleneck, and that the current caliph of the Fatimid kingdom, Abu Ali, was an imperious monarch. Of course, Alhasan himself was born in Basra and his parents died in sectarian warfare, so he was not very blind to the teachings of Islam, and if it weren't for the abundance of foreign materials that can be found here in Cairo, he might have left the kingdom of Fatima long ago.

So when Lao Luo revealed some more perfect ideological systems than this era, and at the same time, this person appeared as a friend's attitude and identity, Alhasen's choice was not variable.

Convincing Al Hassen does not mean that the matter is over, and how to make Al Hassen's unobtrusive departure is the main thing. Because he was a university scholar invited by the caliph to give lectures at the Al-Azhar Mosque, and he was the hallmark of education in Cairo, even though the ministers and lords who did not know anything about scholarship did not value this role with little political foundation, there were still some people who paid attention to Al-Hassen, the signature figure of the caliphate.

"Bartol, you know the environment around me," Alhasan calmed down and was still very organized, "I can't even go back to Basra now, let alone follow you to the East." ”

"Well, that's a nuisance." Even in later generations, if a great scientist wants to visit abroad, he must apply for approval in advance, although the monitoring in this era is not so strict, but ...... Lao Luo thought about it carefully and asked casually, "Alhasen, can you get out of Cairo City?" ”

"As long as it is a place that the Fatimid Kingdom can control, it will be fine." Alhasan pondered for a moment, then said, "If it weren't for the Gerry rebellion, I could have gone to Mogadishu, but I'm afraid I can't go a little farther away now." ”

"I've heard that the siltation of the Nile is serious right now?" Lao Luo suddenly remembered some trivial things that Maher had said.

"Yes, that's right, there has been no large-scale recuperation of the Nile since the late Umayyad Dynasty, and the plan to repair the river was thought of during the Caliphate of Aziz, but it never came to fruition." Alhasan reached out and rummaged through his pile of parchment, found a few documents that were trapped together, and said, "In the past two years, I have checked some information, and I have studied it carefully, and it has not been possible to repair the river as a whole for more than two hundred years, and there are almost twenty or thirty embankments in the entire river every year. ”

"I don't have to look at this, the matter of repairing the river is the best plan for you to leave Helen."

"Oh? How so? I don't see any connection. ”

"Well, let me tell you, how about you think about what's wrong?"

"Well, I'm not good at this kind of thing anyway...... Bartol, you say. ”

"Tomorrow and the day after tomorrow, you go to the caliph and ask for instructions to investigate the water ripples and sediment accumulation along the Nile."

"Well, there shouldn't be any problem, I said this two years ago."

"Then, you will take your entourage and those officials in charge of the water pattern to inspect along the Nile, and you will have to do the same as a normal investigation, from the upstream to the mouth of the sea, it will take at least two or three months."

"That's right, two or three months can only be a cursory look, and the data measurement and correspondence plan are just a draft."

"That's fine, when you get to the sea, you find an excuse to go to Alexandria, and I'll be waiting for you there."

"Alexandria, well, there's no problem, the harbour management there can also be counted in the river dredging project, and then what?"

"There is a key question here, how to communicate between us, I have a nephew of my own clan, you have seen, the one named Cui Shibalang, who is very clever, what about you? Is there anyone who is reliable and sensitive? ”

"My sister's child, who studied at the Al-Azhar Mosque, was named Nuralman, and he made occasional guest appearances as my assistant, and he was also a clever little fellow."

"Your sister?"

"Yes, they all died in the fighting, in Basra."

"I'm sorry to bring up something sad about you."

"It's nothing," Alhasan said after a moment of silence, "then I'll introduce you to Nuralman and you, and the people in between are Nuralman and... Eighteen? ”

"That's right, they should be about the same age, and the occasional interaction can't be seen by outsiders."

"Okay, that's it, when I leave, I'll take him with me."

"Then I said, when you get to Alexandria, there won't be so many people staring at you, and I'll find an opportunity to arrange for you to fake your death."

"Fake death?"

"Just find someone to put on your clothes for the dead ghost, pretend to be robbed by pirates, or fall overboard or something," Lao Luo said some details very casually, and then said, "Before that, I will hire a ship, and then after you fake your death, we can go directly to Athens or Constantinople by boat." ”

"Well, that's fine. But what about the scheme of this project? It can't be wasted. Al Hassen said.

"Well, you can choose a suitable and trustworthy successor, and when we leave, they will naturally take over the job." Lao Luo knows that a technical maniac will not want his work to be wasted, not to mention that this is also an explanation of Alhasen to his mother's family, so he also knows this matter, so he will definitely not miss this point.

"The successor... It's a good idea, I have the right person. Alhasen's expression changed between sadness and excitement, and then he said: "And then, that is, after the boat is gone, it is difficult to come back here?" ”

"That's right."

"Okay......" Alhasen, who said this, was a little silent and looked at everything around him, "I've lived here for nearly ten years, and I'm still really a little reluctant, what about my belongings?" You can't always take these with you when you go to investigate. ”

"Oh yes, so be it, pick your belongings yourself, and organize the things you need to take away, books, materials, etc., and put them in boxes." Lao Luo pondered for a moment, and then said, "I'll help you take it away." ”

"That's great, it's all the work I've done over the years. If you want to throw it away here, I really can't bear it. Obviously relieved, Al Hassen said.

"Just pick the important things and take them with you, and we'll buy the rest, or make something better." Lao Luo is confident that as long as there are manpower, these experimental instruments of Alhasen can be copied soon, perhaps better than these.

Alhasen didn't say anything, just looked at the studio in front of him, and then looked at Lao Luo's demeanor, and his eyes gradually lit up.

The days that followed were very tense, and the first arrangements were made for people on both sides to get acquainted. There were four men on Lao Luo's side, three people on Alhasen's side - and his nephew and butler Gas. Eighteen Lang and Nuralman are actually the same age, but there is only a difference of two or three months, and Nuralman has a good personality, because he has lived with Alhasen since he was a child, so he is not worried about revealing any confidential things.

Of course, personnel familiarity is the node of one thing, and then everyone is busy with their own things.

Al-Hassen quickly submitted a plan to the Caliph to investigate the Nile, which was approved within a week - Abu Ali was arbitrary, but some decisions were made quite quickly. Then, it was Al Hassen who took his nephew Nuralman and a few assistants, as well as the cooperating ministers, to investigate the water patterns of the Nile, and of course, before that, he sorted out his important belongings.

Lao Luo took the time to go to Alhasen's house and put all the packed items into the ring space, well, this matter is unknown. Except for a little time to buy some personal favorite items, Naga, Mnaqi, and Cui Shibalang either trained every day, or were sent by Lao Luo to run around the whole city of Cairo.

It's not because Lao Luo is too lazy to do detailed things, but there are too many things that need to be prepared, and the three young boys should also exercise, not to mention being alone, at least they can become Lao Luo's hands and feet. So, I bought grain, seeds, ironware, small gifts, all kinds of books, cloth, ready-to-wear... Almost all the trivial things went into Lao Luo's purchase list, and the executors were three young people who could barely speak Arabic.

As for Kamil, perhaps because of the relationship between the Minister of Commerce and Nefel, or perhaps because the studies at Al-Azhar Mosque are particularly attractive, he has become obviously a little estranged from Lao Luo and his party. Lao Luo doesn't care about this, at least don't make trouble for yourself before leaving, as for Camille's choice is right or wrong, it doesn't matter, it depends on the arrangement of time and fate.

By the time Al-Hassen left Cairo for nearly a month, Arab craftsmen who believed in fine craftsmanship had successively completed the orders in their hands, not to mention weapons, bows and crossbows, all of which were completed very well according to Lao Luo's requirements.

To Lao Luo's surprise is the ordered theodolite accessories and telescope accessories, in addition to the crystal lens is a simple form of rules, the other components are unified under the premise of completing the requirements, in various parts of the increase in the decoration of the pattern, some of the non-critical places are even inlaid with small gemstones, the store in charge also took the initiative to say that there is no extra fee, it seems that Alhasen's influence in this industry is really not small.

So the simple theodolite reassembled by Lao Luo was completely like a work of art, and all the structures were covered with Arabic decorative patterns except for the necessary functions. The other monocular telescope is full of gorgeous atmosphere, and the purple-red copper surface on the outermost sleeve, plus the inlaid gems can almost reflect the light in front of the eyes of the blind, which is simply an excellent item to fool all beings as an artifact.

Fortunately, this thing can be packed in a sheepskin bag, otherwise this thing that makes Lao Luo cry and laugh really doesn't know how to carry it with him.

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