From the end of the third year of Jian'an to the beginning of the fourth year of Jian'an, there were many major events in the territory of the Han Dynasty, and they were basically related to Cao Cao.

Yangzhou Sun Ce defeated the Danyang Sect Marshal Zulang, and surrendered Liu Xuan's general Tai Shici, completely holding Danyang County in his hands, and only Yuzhang was left in the entire Jiangdong;

Sun Ce listened to the advice of the school captain Zhang Hong and sent an envoy to Xudu to pay tribute and make friends with Cao Cao;

Cao Cao was in the land of the four wars in the Central Plains, and he had no leisure time to go to the south to crusade against Yuan Shu, thinking that the enemy's enemy was a friend, so Cao Cao expressed Sun Ce as a rebellious general and entered the Marquis of Wu;

In order to contain Yuan Shu and appease Sun Ce, Cao Cao not only added an official to Sun Ce, but also married his younger brother and daughter Sun Kuang, Sun Ce's brother, and made the decision to let Cao Zhang marry Sun Ce's daughter from Sun Ce's brother Sun Ben.

Liu Biao of Jingzhou formed an alliance with Yuan Shao to support Zhang Xiu against Cao Cao, and Cao Cao's three expeditions to Wancheng could not be defeated;

During the expedition, the Linxiang people lobbied Changsha Taishou Zhang Xian to oppose Liu Biao and pro-Cao Cao;

As soon as Zhang Xian heard the reason, he started an incident in Changsha, and the two counties of Lingling and Guiyang responded at the same time;

There was a rebellion in the rear of Jingzhou, and Liu Biao's support for Zhang Xiu weakened, which relieved Cao Cao's pressure in disguise.

Xuzhou Lu Bu was defeated and killed, and Cao Cao used his henchman Che Zhou as the assassin of Xuzhou, completely solving the threat in the southeast.

Youzhou Gongsun Zhan, in Jian'an four years of March defeat self-immolation, so far Yuan Shao unified Hebei, occupied Hebei, You, and, Qing four prefectures, its strength reached the peak, at the same time strong troops and horses to attack Cao Cao.

Cao Cao operated on multiple lines among the princes, like an e-sports master, and Long Xiang, who was far away in Hefei, was not idle.

He began to prepare soil cement at the beginning of the fourth year of Jian'an, and in May he made soil cement with satisfactory strength.

On the day of the completion of the experiment, Long Xiang was in the makeshift shed, bouncing and happy like a child.

Because the main material of soil cement and brick are the same, the cement factory is planned to be located in the kiln area.

Long Xiang has been busy with experiments recently, and Lu Su is taking care of the military and political affairs in Hefei, and he himself is deploying the ratio in the 'laboratory' every day, recording data while experimenting.

When Lu Su and Feng Zhong saw Long Xiang, they saw that he was covered in ashes, with mud on his legs, face, and hands, which was dirtier than the brick-making craftsman next to him.

Feng Zhong looked at Long Xiang and asked curiously, "You are in a hurry to come to us, is there anything wrong?" ”

"That's right, there has been an influx of homeless people recently, and most of the remaining houses in the city are seriously damaged, and they must be overhauled before they can be occupied, and General Feng and I are very busy..."

Lu Su's implication is that if you engage in your cement experiment, don't call us to accompany you.

Long Xiang grabbed a handful of gray powder, spread it in his hand and said excitedly to the two: "Uncle Zhong, Zijing, the cement I said has already been completed." ”

"Oh... Congratulations..."

Feng Zhong's answer was very plain, the craftsman battalion under his command was a full-time builder, and he was no stranger to cement-like adhesive materials.

The yellow mud used in the construction of the granary last year also worked well, so Feng Zhong did not have a strong sense of expectation for cement.

Lu Su was not interested in construction, and when he saw that Long Xiang was so excited, he asked curiously: "Then what?" ”

"Naturally, the workshop will be built immediately for mass production, and it will soon be used for urban defense and urban construction."

Long Xiang pinched the soil cement in his hand, and his face was full of smugness that was incomprehensible to outsiders.

The formula of soil cement is very simple, but to be close to the label of later generations, without the assistance of any scientific instruments, can only be tried slowly through stupid methods, except for those who are really interested in civil engineering, few people are willing to 'play with mud' and 'eat ashes' every day.

After hearing this, Lu Su hurriedly dissuaded: "There are many workshops in Hefei now, and I suggest slowing down the cement workshop, it is easy to chew if you are greedy..."

Feng Zhong couldn't bear to hit Long Xiang's enthusiasm, so he patted Lu Su on the back and said, "It's no problem to build a cement workshop, but my people really can't arrange it recently, how about waiting until the end of the year?" ”

Long Xiang was noncommittal, and hurriedly changed the topic and asked: "The houses that can be lived in Hefei are too scattered, and it is a waste of time to repair and repair, how many houses are still missing for the resettlement of the people?" ”

"Hundreds..."Feng Zhong frowned.

Long Xiang waved his hand and said: "Then don't repair it, just build a new house directly, anyway, there are a lot of bricks burned this year, and it is estimated that it will be no problem to build more than 100 new sets." ”

Feng Zhong's eyes widened, and he asked, "Aren't those bricks going to be kept to repair the city wall?" I heard that last year, Cao Cao flooded Xiapi, which caused serious damage to the city wall, and the soldiers in the city saw that they couldn't hold it, so they tied up Lu Bu and dedicated it to Cao Cao..."

Lu Su nodded and added: "The rammed earth city wall has been soaked in water for a long time, and there is a great possibility of partial collapse, and it is easy for the enemy to use the damaged area, so it may be better to replace it with green bricks." ”

Long Xiang smiled leisurely: "Now the conventional brick and wood structure mostly uses yellow mud as the adhesive material, but the yellow mud is easily soluble in water, of course, it can't stop the blister from irrigating.

The cement I made was different, it was as hard as a stone and not afraid of blisters after it was completely solidified, so even if you had to use bricks to reinforce the city walls, you couldn't do without the cement workshop. ”

Lu Su stretched out his hand in surprise and picked up a handful in Long Xiang's hand, and said in his heart, isn't this just dust?

"It's so amazing..."

Long Xiang turned around and went back to the experimental shed and found two cement wastes inside.

Handed it to Lu Su and said, "Zijing try it yourself and see what is the difference between this cement block and the stone?" ”

Lu Su took it with both hands, and immediately felt some weight, he threw it on the ground in front of him, and immediately smashed a pit in the mud.

"It's..."

"Shhhh It's really so powerful, the cement workshop must be built, but the new house should be built..."Feng Zhong wanted to say but stopped.

"If the Hefei city wall is reinforced with bricks, the cost of green bricks is more than 10 million? This is not something that can be done in a day.

Moreover, the small city of Hefei has no quarrel with the world, who will come to flood the city without anything? Now that there are not enough places for the people to live, there is an urgent need to build new houses. ”

After Long Xiang finished speaking, he asked Lu Su again: "What does Zijing think?" ”

Lu Su nodded affirmatively: "What Yunqi said is very true, Hefei is high and water is low, and it is quite difficult to irrigate the city with water, unless there is a heavy rain, causing the rivers to rise, but who can know the sky?" It's also possible to build new buildings..."

Long Xiang saw that Lu Su agreed, so he instructed Feng Zhong: "Since Zijing also agrees, this matter is decided, the cement workshop will be built next to the brick workshop, I will draw the drawings of the cement workshop tonight, and Uncle Zhong will transfer fifty craftsmen to construct it." ”

"I'll arrange it later." Feng Zhong nodded solemnly.

"Zijing, the demand for cement is huge, after the workshop is built, it can't be stopped regardless of cold or summer, and the craftsmen of the workshop don't have to do anything else, you first recruit more than 100 young people to be used, and register to make a register to support the official grain."

"Okay."

After Long Xiang explained to Lu Su, he stopped Feng Zhong and instructed: "Uncle Zhong, last year, you cleared out that piece of land, you can start construction together, and now start digging the foundation according to the drawings, now we have cement, we can make drainage culverts, and we can do it directly in one step." ”

"Good..."

Feng Zhong, as Long Xiang's hardcore confidant, is fully qualified to live in a big mansion in Hefei, but he has been waiting for Long Xiang's new house, and he was moved when he saw the sketch.

The dream is about to come true, and Feng Zhong's heart is like a wild horse running wild.

There was little rain in the summer, and Long Xiang couldn't wait to train cement craftsmen during the construction of the cement workshop.

Half a month later, the first batch of cement in Hefei came out, and the first "real estate" designed and developed by Longxiang also broke ground in Hefei.