Any city in a period of rapid development must carry out large-scale infrastructure construction to meet the growing population of the city!

In fact, in the spontaneous development of Taoqiu for so many years, the scale of the city has been expanding. The pottery mound www.biquge.info is located at the junction of several countries, and the common people of all countries in this era can move to each other, so the pottery mound also has a common people who flow here from various countries. These people did not have a foothold in Taoqiu, so they chose to go outside Taoqiu City and erected wooden sheds along the city wall of Taoqiu, so that Taoqiu also began to appear "shanty towns" similar to the slums in later generations.

Dai Yan was also a little depressed about such a scene, in his mind, how much effort did he spend to sort out and transform the southern city of Taoqiu, and only then did he barely eliminate the slum in the southern city of Taoqiu, and now new slums began to appear in Taoqiu!

This made Dai Yan feel quite powerless, as if a small individual was facing the rules of heaven and earth.

However, Dai Yan does not intend to do nothing, for this expanding city, he hopes to transform it with his own will!

For Dai Yan, the appearance of shanty towns outside Taoqiu City has seriously weakened Taoqiu's defenses, and if it is not properly managed, it will definitely get out of control in the future! Most of the houses in the shantytown are made of wood, and some thatch is used as the roof, and there are no professional fire prevention measures here, if there is a fire, it is estimated that this shantytown will be wiped out immediately!

Dai Yan had no way to solve the problem of urban migrants in the past, and the most important thing was that he could not solve the rigid constraint resource of building materials, so he could only let the development of shantytowns go. Now, he doesn't plan to let it go any further.

The main reason why Dai Yan has such confidence is that he has begun to solve the resource constraints of building materials.

Since Dai Yan arrived in Taoqiu, he found that there is no shortage of resources in the vicinity of Taoqiu. Although it does not have abundant coal and iron resources like Xiangyi, it has other abundant resources.

Two of the most important resources are limestone and clay. With clay and a large amount of fuel from Xiangyi, it was no problem to make sintered bricks in large quantities!

Sintered bricks have a long history in China, and in this era, there are actually sintered bricks made of clay. It's just that in this era, people used logs and charcoal to sinter, and the temperature of making sintered bricks needed to reach at least 900 degrees. In addition, the production of logs and charcoal is dependent on forests, and the availability of this fuel is far less convenient than coal, which leads to a very low yield of sintered bricks.

This problem does not exist at all in Taoqiu! At present, its main fuel is coal, which has a very high calorific value and can easily reach the temperature required for burning bricks. After many times of firing, Dai Yan let the workers master the temperature control skills of burning bricks through rich experience, so that the temperature of bricks is easily controlled between 900 degrees and 1100 degrees, so as to get high-quality sintered bricks!

In order to increase the yield, Dai Yan also made a manual brick machine with reference to the machines used in agriculture in later generations to manually make nutrient bowls. The machine, which is made entirely of steel, only needs to be knocked on the clay with water and then pressed out by the foot pedals to press out the brick blanks driven into the machine, and the prototype of a sintered brick is completed. With such a machine, one person can hit 500 prototype bricks every day without stopping!

A brick factory has hundreds of people, and it is not a problem to create more than 50,000 prototype bricks every day!

And the prototype brick obtained in this way can be sintered to get the perfect sintered brick! There is a large amount of coal as fuel, and the production of sintered bricks has not been affected in the slightest! And this high-efficiency brick-burning mode also makes the price of red bricks, green bricks, etc. extremely low!

With the same technology, the problem of sintered tiles can be easily solved.

This is where the main building material is solved.

Other, more important building material, lime, is more readily available. Dai Yan knows that lime is nothing more than calcium oxide. This kind of stuff can be easily obtained by calcining limestone! Limestone, which is widely found in nature, is also readily available in the hills near Taoqiu.

With lime, Dai Yan immediately went through the dry water period of Jishui and Heshui, and continued to excavate the river sand near Taoqiu. The resulting river sand is filtered to produce extremely fine sand.

The river sand obtained in this way can make the Jishui and Heshui deep and wide, which not only greatly reduces the risk of flooding in Taoqiu, but also enables a larger number of ships to be berthed near Taoqiu!

By mixing river sand with lime and water in a certain proportion, lime mortar can easily be obtained! This lime mortar with fluidity and water retention is the best material for bonding bricks!

With sintered bricks, sintered tiles and lime mortar, building a building near the pottery mound is no problem! And the houses made of this high-quality material, under Dai Yan's strict requirements, can almost reach the quality of ordinary rural buildings in later generations! Many Taoqiu merchants, craftsmen who profited from various trades, applied for a homestead near Taoqiu, and built a series of buildings with such a homestead!

For such an application, Dai Yan only followed the principle of pottery consistent property protection, and the applicant only needs to pay a one-time land transfer fee to the Yi government, and the applicant can obtain complete property rights of the land!

Compared with the later Celestial Dynasty, which only had the right to use the land for a certain number of years, Dai Yan, a lord of Taoqiu, did quite kindly!

While Dai Yan gave the people of Taoqiu the right to build houses independently, he actually used some subtle means to regulate and control.

Most of the newly built houses are outside Taoqiu City, and in today's Warring States Period, Taoqiu is the richest city in the world, and the probability of it being attacked by various countries is still very large! Therefore, Dai Yan had already made a plan when dividing the homestead, and through this planning, the city's defense was perfectly considered!

Dai Yan issued a decree in Taoqiu stipulating that everyone who applies to build a house must build a two-story building in a unified manner! And each homestead has a fixed size, and the foundation of the building must also be personally demarcated by the officials of Taoqiuyi Mansion! Anyone who dares to disobey this decree will be judged to be illegal by the Taoqiu Yi government, and will be severely cracked down by the newly established urban management team in Taoqiu!

In this way, the expansion of the entire Taoqiu City became orderly and orderly. On the west and south sides of Taoqiu, rows of buildings were built next to the west and south walls of Taoqiu.

Once Taoqiu has changed and is attacked by foreign enemies, this row of buildings can form a wall at any time! In this way, the land part of the entire Taoqiu formed several towering walls, and any army that wanted to attack the main city of Taoqiu would first need to break through the fortresses formed by these outer buildings!

Dai Yan extended the street composed of buildings until Jishui and Heshui, thus forming a real Taoqiu area!

The Great Taoqiu area is defended by a number of buildings on the west and south sides, and there are a large number of open spaces on the east and north sides, backed by Heshui and Jishui respectively, which makes the whole Taoqiu form an impregnable city!

After Dai Yan discussed with Le Yi, the most strategically minded general in the entire Taoqiu, both of them believed that there were two ways to really break through such a big Taoqiu. The first is to fight with Taoqiu through street battles regardless of the dead and wounded, and gradually break through several streets and intersections to the west and south of Taoqiu, and then reach Taoqiu City Wall through these streets to attack the main city of Taoqiu!

The other way is to fight a decisive battle with Taoqiu's sailors on the water, after eliminating Taoqiu's sailors, land from Jishui in the north or Heshui in the south, and then drive straight into Taoqiu City!

Both of these methods, either way, need to face the resources that Taoqiu has mobilized from all over the world through powerful commerce! If there is a war of attrition, unless Taoqiu is completely bankrupt, then such a city is almost impossible to breach!

Such a superior defense on all sides, and relying on the mobilization of resources by waterway as a supplement, already had the defense pattern of Constantinople, the capital of the Byzantine Empire in later generations!

In the process of approving homesteads and building buildings one by one, Dai Yan also completed another important achievement by moisturizing things silently, that is, to forcibly divide Taoqiu into the common people at the bottom of Taoqiu, so that it could not become a big family against the Yi Mansion!

The big family is powerful, and confronting the government is the most troublesome problem in this era.

There is a very important decree in the Qin State Shang Ying's reform law, which is to implement the system of different sons. This decree stipulates that where there are two or more sons in a household who have reached the age of establishment and do not live separately, the household registration tax shall be doubled. This kind of coercive decree made the Qin State full of small families, and there were few large families. This greatly increased the ability of the Qin State to centralize power, and the ability to extract wealth from the common people was also greatly enhanced!

Dai Yan did not enforce the law of the Department of Alien Children, but set a hard area for each household's residence. When a family is overpopulated, if they still do not divide their families, then they will not be able to get a new homestead, and the whole family will have to be crammed into one place! If they want a more comfortable living environment, they must forcibly break up the family and divide it into several small families!

Tao Qiu did not pass the coercive method of the decree, and he achieved the effect of the decree of the Qin State's Alien Son, which has to be said to be a miracle!

This way, of course, has no effect on those really powerful families, such as the major merchants of Taoqiu who follow Dai Yan. However, Dai Yan understands these big businessmen, the big bourgeoisie, has always been based on bribery, and everyone has formed a solid alliance of interests, how can he weaken their power for no reason?