The smoke is a round earthen pillar, about 1.3 meters high, with an inner diameter of 1.2 meters and an outer diameter of 1.6 meters.

This hollow earthen pillar is covered with two large clay slabs, one covering half of the earthen pillar.

Broken pottery shards are placed underneath the clay slabs, so that there is a spacing of about two centimeters between the clay slabs and the earthen pillars.

The green smoke and some flames came out of the edge of the clay slab and the gap between the two clay slabs.

Of course, this is not a beacon tower that burns wolf smoke to warn, but a kiln made by Heiwa, a pottery master of the Qingque tribe, after suffering from failure, under the guidance of Han Cheng.

The kiln was not originally built here, but about a hundred meters from here, closer to the river, where water and mud were easily accessible.

However, after a heavy rain and the rising river water last year, half of the kiln collapsed and could no longer be used.

Having learned the lesson of that time, Heiwa spent nearly ten days here about 100 meters away from the river bank to rebuild this earthen kiln, which was one size bigger than the previous one.

This place is far away from the small river, and the terrain is high, last year several heavy rains, the small river water did not flood here, the earth kiln is indeed a good choice to build here.

After several experiments, as well as the tip of the Divine Son, Heiwa also figured out some tricks for building an earthen kiln.

The first step is to dig a pit about 90 centimeters deep, 1 meter long, and 90 centimeters wide in the place where the kiln will be built.

In the middle of the pit, a wall about half a meter high was erected with adobe mixed with mud, and three slender and hard sticks were erected on top of the wall every ten centimeters, and the other end of the stick was placed on the edge of the pit.

The previous kiln was small, and there was no need to add this wall, just put the wooden sticks on both sides of the soil pit, but now the kiln is bigger, and if you don't add the middle wall, these wooden sticks will not be able to bear the weight at that time.

There is no need to worry about the sticks being burned by the flames, as they are covered with a thick layer of clay.

Every three sticks are a group, and then wrapped in mud after being together, the reason why three sticks are used, there is also a reason, one is to increase the bearing capacity, and the other is to wrap more mud outside, if there is only one stick, it is not easy to wrap mud on it.

Once this is done, the wall will be built.

After the wall in the pit is level with the ground, continue to put up this kind of stick wrapped in a thick layer of clay on top according to the forefront, which is more densely placed than the lower layer, because the clay embryo that needs to be fired will be placed on the top of this layer at the same time, and it will not work if it is not built and solid.

After these are done, the bottom of the entire kiln will be built, and the rest will be to start building the walls of the earthen kiln with mud.

Like the rammed walls of the tribe, there is also crushed hay and some table salt, and according to the experience gained from the previous construction of the earthen kiln kiln that is prone to cracking, Heiwa also added some sand from the downstream jars to the mud.

The banks of this small river are mostly muddy, and only on the shallow side of the bend can there be sand accumulation.

One thing that needs to be deliberately mentioned is the construction of a wall to add salt to it.

This move was too much salt, and after some thought, Han Cheng changed his approach.

It's not that you don't put salt in the mud anymore, but you don't put the purified salt anymore.

Directly smashing the salt mine brought back from the salt mountain and adding it to the mud, this can save a lot of effort.

In order to ensure that the kiln is round, Heiwa also used two wooden sticks for comparison, one stick is one meter long, and the other stick is one meter six.

This method was taught by Miko before, at the beginning, the pottery pinched out by hand was always not round enough, and after Miko taught this method, this problem that had plagued Heiwa for a long time was immediately solved.

Later, he used it in the construction of the kiln wall.

For Heiwa, building a kiln wall is actually similar to building a clay pot, which is difficult for him to deal with mud.

Because the kiln wall is purely made of mud, and the mud that has just been reconciled is relatively soft, so every time you build a height of 30 centimeters on the top, you need to light a fire below to bake the kiln wall relatively strong, and then increase the height.

The kiln was smoking, and before you got close to it, you could feel a wave of heat coming over your face.

About ten meters away from the earthen kiln, there are several large stones with relatively flat surfaces, and the black baby with muddy hands is busy here.

He took out some fine pieces of dry soil from the clay pot below, sprinkled it evenly on the stone in front of him, and then placed a wooden frame about half a centimeter thick on it.

The wooden frame is made of sticks with a certain degree of flexibility that are broken from the middle, and the joints are tied with rope grass.

The flat side of the broken stick is facing inward, and the curved side is facing outward, so that the edges of the pottery are flat.

The wooden frame is not a standard rectangle, but a large end and a small isosceles trapezoid, with a gap of one and a half centimeters between the top and bottom bottoms, so that the tiles can be seamlessly connected.

In the beginning, it was not like this, but a standard rectangle.

After overcoming the problem of the curvature of the tiles with the help of Miko, Heiwa finally fired the first batch of tiles.

Looking at the first batch of things called tiles by the Son of God, Heiwa was very happy, because the Son of God said that with this thing you can build a better house than the deer pen, and by the time the people in the tribe can move out and live in the house.

Although I don't know why Miko wants to move out of the cave like this, just by looking at the wistful look on Miko's face when he said this, Heiwa knows that this house must be more comfortable to live in than the cave where they have lived for generations.

In addition to the reason for the house, there is another reason why he is happy, that is, he has completed the things that Miko has assigned, and Miko looks at the tiles he has fired, and his face is full of joy.

This is undoubtedly the best praise for his craft, and Heiwa is certainly happy.

However, his joy did not last long, because after holding the two tiles for a while, Miko suddenly put them down and patted his forehead with his hand with a wry smile.

This made him worry if it was because he didn't burn it well and caused Miko's displeasure.

Heiwa's craftsmanship naturally didn't say, although it was the first time to fire tiles, but with the experience of firing a large amount of pottery before, the tiles were fired very successfully, and compared with the small tiles that Han Cheng had seen in his later life, it was almost the same.

Of course, this should ignore the disadvantage that the size of both ends of the burned tile is the same.

The size of both ends of the tile is the same, which means that after the two tiles are stacked together, there will be gaps, and it is easy to leak rain when the roof is paved with such tiles.

After a period of rectification, the mold used to make tiles became what it is now.