The width of the ditch does not need to be too wide; it only needs to be wide enough for water to flow through normally without getting blocked.

Therefore, the width of the ditch was set at fifty centimeters, which is exactly the width of irrigation ditches for farmland in rural areas.

To speed up the process, we divided our people into two groups. We started digging from both ends of the ditch towards the middle, and finally, we all met at the center to complete the ditch.

This ditch encircles three mountains. We're working on a rate of 20 meters per person per day. If everyone works together, we should be able to dig 6,000 meters in a day.

At this rate, it should take just over three days to clear the ditch.

There was originally a better place, but when the ancient method was used to measure the water level difference, the difference in some areas was too large.

This means that the depth of this section of the ditch needs to be increased, otherwise the water simply cannot cross this section, and naturally, it will take more time.

Our most precious resource right now is time, so we can't take this risk. We can only find a relatively stable area with a small elevation difference.

The project began, and all the tribespeople started digging according to the marked points. The current depth is set at forty centimeters, and the specific repair work will be decided after water is introduced later.

While everyone was digging the ditches, I wasn't idle either. There were more important things for me to do, so I assigned a few tribesmen to help me with this task.

We first went to the river to collect some clay, and then used the same method we used to make clay kilns to make two clay pillars about the thickness of a calf.

These two pillars are about three meters high. Their main purpose is to stand on the riverbank and support a huge waterwheel.

In the past, I might have chosen to use bamboo or trees to make the pillars.

But this time it's different. We're dealing with a mutated Protozoa that can devour all organic matter.

The pillars of this waterwheel are on land, so naturally they cannot be replaced with materials such as trees.

The waterwheel is about 2.5 meters in diameter. After the support column is driven into the ground and fixed, the waterwheel can be submerged in water to a depth of 40 to 50 centimeters.

The location of the waterwheel was also deliberately chosen, as it is the closest point to the irrigation canal, only about ten meters away.

All that's needed is to add some terracotta pillars to the ground, and then place water collection troughs made from split bamboo on top of them. The waterwheel can then use the force of the river's flow to propel the waterwheel into the irrigation canal.

In theory, as long as this system doesn't malfunction, we can rely on the protection of the water flow to survive on this enclosed land.

However, all of this is just theory. In the long run, human error or accidents will inevitably occur.

But we simply cannot withstand such an accident. Just one accident, and this land we have fenced off will become our cemetery.

Therefore, only by getting far away from the land and going to a larger body of water to completely sever ties with the land can one possibly survive.

An ark must be built; it is the foundation for our long-term survival.

All the pillars and water tanks were installed on the first day, and the water wheel used to draw water was built with everyone's help to create the most basic frame.

However, this waterwheel is unlike any other component; it's the most intricate and complex part of the entire system to manufacture. Making this many on the first day is already quite an achievement.

When we returned, we checked on the construction progress of the tribal irrigation canal. So far, the progress is going well and it is proceeding in an orderly manner according to our previous plan.

The next day we finished making the waterwheel and installed it on the two tallest pillars, which were about the thickness of a calf, in the evening.

The bamboo tubes used to draw water on the waterwheel are all made from cut sections of giant dragon bamboo, and each bamboo tube can hold at least five kilograms of water.

There are a total of one hundred bamboo tubes on this waterwheel, which means that when the waterwheel turns once, five hundred catties of fresh water are poured into our ditch.

Since this is the starting point for both excavation teams, it's a good time to dig water into the ditch. This will make the soil easier to excavate once it's moistened.

The waterwheel whirred as it was washed by the river's current, and the water flowed continuously through the bamboo tubes into the giant bamboo trough.

Although the waterwheel wasn't turning fast, the flow of water it drew in was considerable. The giant bamboo water trough, about the size of a bowl, was more than half full of water, which flowed into the irrigation canal.

However, just over an hour later, both canals were filled with water.

After we found water, we moved our campsite to the vicinity of the recently dug irrigation canal to make our digging work easier.

This way, everyone can get more work done each day. If not, they can come back after dinner to work an extra night shift before going straight back to camp to rest.

Seeing that two-thirds of the project had been completed, everyone was very happy. If they just gritted their teeth and finished the remaining third tomorrow, the circular ditch that resembled a moat would be completed.

But fate sometimes likes to play tricks, and on the third day of the excavation, problems still arose.

At first, both teams dug smoothly without encountering any problems. In fact, after being soaked in water overnight, the soil was much easier to dig than before.

However, as they dug, they encountered many large rocks. Even the smaller ones weighed tens of kilograms, while the larger ones weighed hundreds or even thousands of kilograms.

Progress was immediately halted by these stones. Adding to the difficulty, the water in the ditch made some of the stones extremely slippery, making them very difficult to move.

What's worse is that these rocks are either basalt or granite. It's okay if I use a stone hammer to smash some of the smaller rocks; a few blows and they're open.

But when dealing with those large stones weighing hundreds or even thousands of kilograms, a few hammer blows wouldn't budge them at all; instead, they would leave his hands numb from the impact.

Slightly altering the route wouldn't make much difference, as the underground area seems to be rocky, and no matter how you change the route, you can't get around these huge rocks.

I refuse to believe it's so strange. We've dug all this way, how could we be stopped by this last little bit of distance?

I remember that among the supplies brought out by the Mila tribe were some dilute sulfuric acid sealed in bamboo tubes. If I have that, I have a way to break open these boulders.

I told the tribespeople to keep digging. They should dig up what they could, and leave what they couldn't dig up where they were until I came back to deal with it.