After inspecting the location of the fortress and conceiving the construction drawings of the fortress, the protagonist quickly returns to "Dongyang Castle" on Xiaoqing.

Upon returning, the protagonist immediately begins experimenting to see if the big-headed ant can use "concrete" to build an anthill like the indigenous ants or termites in Africa.

He summoned ten worker ants and ten soldier ants and had them each carry some clay particles to the surface.

The protagonist then uses the message packet to order them to smear their saliva on the clay, which they then base on the ground.

After half an hour of patient waiting, after seeing that the clay is almost dry, the protagonist tries to touch what looks like the clay pile.

The result of the experiment is very exciting for the protagonist, and the clay mounds are so strong that even the protagonist's brute force can hardly destroy them. And the saliva of both worker and soldier ants is very effective.

Later, the protagonist experiments with ant droppings, and the results are similar, with saliva and fecal-treated clay drying out about the same strength.

The protagonist also gets some inspiration from the sturdy clay mixed with saliva and feces - the pottery fired in the combustion chamber was molded with pure clay and dried before firing, but because the pottery tire is too thin, the yield is low, and now it is not possible to produce it on a large scale, so it can only supply some pots to the male ants.

Now that the clay is found to be so strong after being treated with saliva and feces, the protagonist wants to make pottery from the treated clay, which should greatly improve the yield rate. Of course, these pottery are full of things to be eaten, so don't dispose of ant droppings.

Ants are full of treasures.

Ant saliva, for example, can be used not only to process clay and make it "concrete". The protagonist also sees ants using saliva to disinfect their injured companions.

Many animals lick their wounds to disinfect them, and ants are no exception. In the real world, researchers first discovered this behavior in the Matabele ant (Megaponera analis) living in the Sahara Desert in Africa, who can heal their companions' wounds by licking them, and their saliva can indeed save lives.

They will bring the injured companion back to the nest, and then for an hour, the healthy ants take turns licking the wounds of the injured companions, which can reduce the mortality rate by 70%.

Not only that, but in order to maximize the therapeutic effect of the entire colony, these ants have developed a complex set of altruistic medical rules.

Healthy ants will treat injured ants and leave no questions about severely injured and dead ants.

This is because injured ants judge their injuries on their own and release a pheromone that alerts their healthy companions that they need help if they think they deem them worthy of treatment. As for those who are seriously injured and unable to do so, the signal will not be released.

In addition, severely injured ants will actively prevent their rescue, even if they are coated with pleromones for help, when ants come to help him, he will refuse to cooperate with the rescue operation until the rescuer gives up.

Ant droppings are also a good thing, and the protagonist has discovered that the fluorescent bacteria that the entire ant nest relies on for lighting are cultivated with ant droppings, which is also a mutually beneficial symbiotic relationship.

The ant's feces are able to grow fluorescent bacteria because they are rich in nutrients that plants need, and some ants also use their own feces to grow edible fungi. In addition, the leaves of some plants, such as coffee trees, are even able to absorb the droppings of certain ants directly to obtain nutrients such as nitrogen.

After confirming that this unique "ant concrete" works, the protagonist immediately gathers a large number of worker ants and prepares to build an identical fortress at the entrance and exit of "Dongyang Castle".

This can train the construction team, and can also provide additional defense for "Dongyang City", even if an enemy raids near the entrance of the lair, it will not lose its ability to resist.

Due to the small size of the construction site, the protagonist only summoned Rambo and a hundred worker ants, and it was no longer necessary to summon the worker ants, and the construction site could not accommodate more workers.

The protagonist sends the envisioned construction information packet to Rambo and all the worker ants, who oversee the work. The protagonist leaves to do his own thing.

Around evening, Lambotu sent a messenger to report that the fortress had been completed.

The protagonist immediately rushes to the ground to inspect the completed fortress.

The fortress is completely in line with the design of the protagonist in appearance, with a decimeter-deep moat wide at the top and narrow at the bottom, and a trapezoidal earthen embankment with a decimeter high. It seems that the ants are full of engineering talents, as long as they have drawings.

Since it is the acceptance party and a key project for military purposes, the protagonist must of course be stricter. He found a random earthen embankment and used his best strength to hit it, testing how strong the earthen embankment was.

Before the impact, according to the sturdiness of the "ant concrete" known in the earliest experiments, the protagonist thought that even if he had a divine power, he would not be able to shake half a point.

But the result was unexpected, under the full impact of the protagonist, the top of this earthen embankment actually collapsed a hole, and many large and small concrete blocks rolled down......

"Damn, ants will also cut corners to make tofu slag projects?" This is the idea of the protagonist.

He just wanted to call Lambotu and the construction worker ants over and scold him, but when he thought about it, it was wrong, the ants shouldn't be such chicken thieves.

He carefully examined the crumbling concrete blocks and found that the small clods were indeed strong, but the larger ones were hard and brittle.

The protagonist suddenly realizes that it is not the ants who cut corners during construction, but the concrete itself is too brittle.

When humans use concrete to build buildings, they have to add steel bars to make up for the shortcomings of concrete tensile resistance, and African ants also need to find a plant to act as a skeleton when repairing ant mounds.

And the protagonist forgets this when he conceives the design of the fortress, so that there is no "skeleton" in the repaired earthen embankment, and the whole building is empty and hard, but it is not resistant to impact.

The protagonist knows the crux of the problem, but it's getting late today, and if he wants to tear down the earthen embankment that has been repaired and start over, he can only wait for tomorrow, so the protagonist asks everyone to call it a day and go back to the nest first.

Maybe God wants the protagonist to realize that he is a complete double knife in terms of engineering design, so it rains heavily that night.

The ants sensed the change in air pressure in advance and prepared their usual responses.

But not long after the heavy rain fell, the raging rain still poured into the nest, and soon exceeded the nest's ability to cope. Starting from the upper part of the nest, the nest begins to be flooded one after another.

The protagonist feels that this flood is particularly ferocious, so he fights the flood while braving the flowing flood and crawls to the entrance of the nest, wanting to understand the reason for the extraordinarily turbulent flood.

As soon as he climbed to the ground, the protagonist finally understood.