The task assigned by the protagonist to "Waterfront City" was faithfully carried out by the local king, but the effect was very average.

Most of the worker ants who burrowed in the soil of the stone crevices failed, and these stone crevices were basically formed by the cracking of the rock disk of the small island foundation under the action of long-term seasonal alternation and temperature changes, and could only lead to the inside of the rock plate, and there was no space for excavation and expansion.

Only two passages were still in the soil when they went down the crevices, but after going deeper than a meter into the ground, they were soon blocked by groundwater.

This means that the groundwater level is very high due to the influence of the river, which completely eliminates the possibility of the "waterfront city" expanding underground.

Preliminary experimental excavations to expand the nest inside the banyan tree were similarly unsuccessful. The main obstacle is that the ants cannot shake the fibers of the wood.

In fact, the hardness of banyan wood is soft among all woods, and the dead banyan tree will quickly decay and embrittle after being placed for a while, so the human world rarely uses banyan wood to make beams, furniture, etc., and can only be used for fire.

But for ants, the fibers of the living banyan tree are rich in moisture and toughness, which is simply not something that their once-proud jaws can handle.

Over the course of a few days, the jaws of many worker ants had been broken in the process of digging wood under the king's compulsory orders. This kind of trauma is fatal, and there is no post-traumatic plastic surgery in the ant world, and with this level of injury, these ants will soon starve to death because they cannot eat on their own.

Even if it is not possible to let other ants feed them, the ants do not have any concept of work-related injuries, in the eyes of the kings, rather than leaving these disabled ants who can no longer work to waste food, it is better to wait for the new eggs of the queen ant to grow up to save trouble and resources.

The protagonist was speechless after learning the news, and in his opinion, these kings of "Waterfront City" are a group of dirt buns who lack practical experience.

The main job of the general secondary nest is to collect food routinely throughout the year, so the king here does not have much experience in other aspects, and even if the "waterfront city" is occasionally expanded, it is to make full use of the natural decay of the surface of the banyan tree, which is not very difficult.

But once they encounter the part that must be attacked, these kings are helpless, and they can only come up with any solution, but to make their subordinate worker ants and soldiers hard, and use the toughness of wood fibers to test the strength of the ant's jaws.

When the protagonist finds out about this situation, he immediately stops their stupid behavior, but he still doesn't know what to do next.

The expansion of Waterfront City is also imperative, and if a lair with enough space and temperature for the Divine Emissary Legion to be stationed before winter is built, then the so-called defense plan is a joke. At that time, the Paving Ant Barbarian Army attacking the "Waterfront City" during the winter day will only encounter a group of defenders who have been frozen to death and are unable to resist.

The protagonist immediately flies back to "Dongyang City", and he transfers half of the staff from the big worker ants and light gold workers who have been assigned to the construction team to engage in scientific research and technical work, and together with some skilled worker ants in the construction team, let them immediately go to the "waterfront city".

Two days later, the builders arrived at their destination, and they got to work without taking a break.

At the request of the protagonists, the builders directed the local worker ants to conduct a comprehensive inspection of the bulky banyan tree to find a suitable site for expansion and to develop a plan for expansion. Some of these builders have also been involved in the expansion of the Stump Fortress, and have had similar experiences - although the Stump Fortress is a dead tree, it is less difficult to construct than the Waterfront City.

The hard work paid off, and soon the builders discovered a fact that left the protagonist both happy and speechless - there was a suitable nesting site not far from the entrance of the original "Waterfront City".

It turns out that ficus trees are soft and not very dense, so they are easy to breed borers. These borers will create criss-crossing passages inside the banyan tree, and in some cases, it can even cause the entire huge old banyan tree to collapse.

The builders found a few passages that had been eaten by the larvae of some kind of insect.

In fact, the earliest "Waterfront City" was a city taken by the big-headed ant kingdom from the paving ant barbarians, and the paving ant barbarians used the natural moth-eaten passages they found to expand and establish the "Waterfront City".

Since the Paving Ant Barbarians are more adaptable to the cold winter climate, they are able to live in the "Waterfront City" for a long time.

After the big-headed ant kingdom seized this secondary nest, because the big-headed ants were afraid of the cold, they would all be wiped out before winter. Year after year, no ant remembers the origin of "Waterfront City". The newly reconsigned ants are not aware of the secondary nest either, and they will only barely dwell in their original nests, at most occasionally expanding a few nests in some decaying wood.

If it weren't for the protagonist and the construction team to take a closer look, there might never have been a simple expansion of "Waterfront City".

The puzzle that had been bothering them was solved, and the builders quickly selected a suitable one from the many moth-eaten holes throughout the tree.

Some passages were too small, or too close to the bark surface, or the openings were not in a position to allow access and defense, and these were denied. The worker ants also fill these unused cavities with clay to increase the strength of the banyan trees and to prevent the paver ant barbarians from taking advantage of them.

The final moth was chosen with two openings in the bark, one in the middle of the trunk facing south, which served as an entrance for the ants. There is also a mouth located at the top of the trunk, which serves as a natural chimney for the combustion chamber.

The scale of the tunnel is large, only two entrances and exits are separated by five meters, and most of the cavity goes deep into the center of the tree, which can effectively meet the requirements of thermal insulation.

The scale of the primitive moth is not enough to meet the needs of all the troops stationed and the storage of materials, and there is no combustion chamber and various nest structures, but fortunately, the banyan tree has a soft heart and many decaying parts, and the worker ants can expand it relatively easily.

According to the plan, the expanded nest chamber near the bark is mainly used to store grain, and the natural low temperature here is conducive to the storage of grain. And the nest room near the center will serve as a barracks.

The middle nest is connected to the chimney, which is used as a combustion chamber, and for fire prevention, the huge nest is also plastered with a thick layer of wet mud, which becomes a fireproof layer when it is dried by the fire.