This automatic sharpener isn't just for sharpening knives. We also have a lot of saw blades that need sharpening and honing. Dull knives, axes, and chisels all need to be sharpened to be used better.

If grinding is done entirely by manpower, it will not only be inefficient but also a huge waste of time, which will delay the progress of the project.

After making this little gadget, I drilled a small hole next to the water trough of the waterwheel not far from here, and used a hollow shrub branch to connect a small stream of water to the constantly rotating millstone.

Now that everything is ready, you can simply put the tools on the grinder when you need to grind them. Because there is a constant flow of water through the grinding disc, the tools will not be subjected to excessive heat and thus will not undergo rigid annealing.

Water flow can also make grinding more efficient, producing sharper and more durable results than dry grinding.

The leader of the Mira tribe seemed to be used to seeing these things. Back when he was in the tribe, Tang Yi had created far more things than these.

The chief of the Asada tribe exclaimed that the Mira tribe was fortunate to have such tribesmen assisting them. If it weren't for the interference of these Haru, the Mira tribe's development level would have far surpassed that of the Asada tribe in no time.

It's a pity that the leader of their tribe has been missing for more than ten years. Otherwise, if the two of them joined forces, they would probably have been able to rule the world.

The chief of the Asada tribe shook his head helplessly. Thinking about it now was pointless. Whether everyone could survive in the long run was still a question.

I should think about what to eat today; I'll just live one day at a time.

After a few days of improved food, the Haru quickly recovered. It must be said that these modified war machines possessed truly remarkable regenerative abilities.

Now their bodies are almost at their peak, and they can carry heavy timbers more easily than our tribesmen, without even panting.

If the Haru army had any doubts before, they are now completely convinced.

They were treated the same as other tribesmen, receiving a large amount of fish and meat, and were also provided with simple shelters to protect themselves from the rain.

Now, Chief Haru realizes how right his initial choice was. If he hadn't boldly joined the ranks of these former enemies, his clan would probably have starved to death and become nourishment for those primordial algae long ago.

After spending this time together, Haru has gradually come to accept the kindness of our tribesmen.

Previously, they simply held the extreme view that all tribes other than their own were treacherous and could not be trusted at all.

Now, Haru is re-examining the issue and discovers that these tribes are not as bad as they thought.

The women from the other tribe would still give the children from their own tribe something to eat. At first, the children were very wary, but after spending some time together, they started playing together.

Chief Haru even had a thought he had never dared to consider before: if everyone stopped fighting and instead helped each other and developed together, wouldn't that be much better than directly plundering each other and incurring their hatred?

This groundbreaking and novel idea even startled Chief Haru himself.

However, the events of these past few days, and the attitude of others towards their own people, have begun to take root and sprout in the hearts of all Haru, forcing them to re-examine this issue.

Perhaps time is still too short, and the two sides need to communicate more deeply. Maybe one day, their former bitter rivalry can be overcome, like Pat and Top, who put aside their differences and joined forces to deal with external threats.

………

The logging process has been proceeding smoothly, and the protozoan algae have been kept out of the water channel and cannot continue to spread.

In order to minimize the impact of Prosopa spp. on our air quality and camp safety.

Every day, two groups of people use sticks several meters long to sweep away the newly grown Prosopa spp. outside the ditch.

One group consisted of people from our side, and the other group was a team formed by Haru.

This process is carried out six times a day. In the morning, Haru or our team will sweep through the area first, and then the remaining teams will sweep through it again. This double protection ensures that no one escapes.

While the mycelium of *Protoplastrum* grows rapidly, the fruiting bodies grow much slower. They still need to grow from small mushrooms upwards, taking about two days to develop into large *Protoplastrum* fruiting bodies.

Even with its rapid growth rate, the high frequency of six sweeps a day cannot withstand such destruction.

Often, the mushrooms that have just begun to peek out from the ground are immediately knocked down with a stick. Even if any slip through the net, the second wave of raiders will follow up and finish them off.

It doesn't matter if it leaks again; there are two more leaks at noon and two more at night. Anyway, the area within ten meters of our irrigation canal is completely barren, so there's no way any fruiting bodies could grow there.

As long as those tall fruiting bodies are far away from our irrigation canals, there will be no possibility of Prosopa spp. collapsing down to form a bridge for the hyphae to pass through.

These measures were decided upon from the beginning, and so far they have been implemented very effectively. The canal is undoubtedly an insurmountable barrier for the *Protoporphyra*, which simply cannot cross to our side.

Project Ark is still underway. According to the pre-designed plan, we need to build the skeleton of the ship first.

This is the first time I've ever built a ship this big. For some critical pressure-bearing parts, I plan to use a multi-layered honeycomb structure.

Since we don't know how many years we'll be living on this large ship, its design must take all possible problems into account in advance.

The sealed hull's honeycomb structure acts like individual air chambers. These chambers provide the ark with tremendous buoyancy, and even in the event of a severe impact, the multi-layered honeycomb structure protects the hull from flooding and sinking.

There was no standard for how big the ship should be, so I took the most basic approach to build this ark that we would use in the future.

Based on the calculation that each person needs at least ten square meters of living space, the total number of all of us, including Haru, is estimated to be around a thousand.

According to this calculation, the total area per person should be around 10,000 square meters. Besides housing people, a large amount of plants and crops also need to be moved onto the ark.

Therefore, the area of ​​the top deck should be multiplied by ten, which is about 100,000 square meters.

With the area defined, we had a general direction for determining the dimensions of the main body of the ark.

Taking a length of 500 meters as an example, the width of the hull would be estimated to be around 200 meters. However, since it is an ark, the hull cannot be a perfect square; it must have some angles.