I do have a way to temporarily solve the time constraint problem. However, building the ark remains a major issue.

If it were just building a small boat like a canoe, perhaps I could manage. But the ark is so enormous, and the structural aspects that need to be considered are not so simple to accomplish.

I felt like my head was about to explode. Getting to the surface was our only way out. This line of thinking was definitely right; we could only take it one step at a time and see what happened next.

Our situation can't get any worse. We can only find a new chance of survival if we get to a large body of water.

After some discussion, no agreement was reached, so everyone had to accept this plan for now. The nearest water source near the Yasaida tribe is the super-large river, or what could be called a river, that I discovered earlier.

It's still some distance from here to the location of that big river. Even traveling at full speed, it would probably take a whole day to get to the vicinity of that river.

We are pressed for time. The Yasaida tribe is ready, and we are on our way and ready to depart at any time.

The leaders of both tribes immediately made a decision and set off for the nearest body of water to make a final decision.

All the people from our two tribes joined together and began their migration towards that great river.

We didn't dare to waste a moment along the way, and our pace was even faster than expected. By the time we reached the great river, it was just beginning to get dark.

The people from the two tribes began to choose a place to camp for the night. Both sides had brought a lot of leather, but setting up camp simply meant spreading the leather on the ground and sleeping in the open.

If there's anything different, it's that there's a campfire at night. The campfire isn't for warmth, since this is the tropics and there's no need for warmth here. It's mainly for dealing with wild animals.

While everyone was cooking over a fire, we and the two leaders used flashlights to survey the surrounding terrain.

This place is probably near the water; the kind of winding willow trees I used to see in my hometown have grown quite a bit along the riverbank.

Besides being used as fuel for starting fires and as weaving material, the bark and leaves of these willows are rich in salicylic acid, which can be used as an alternative to antibiotics and can be applied externally to prevent wound infection.

In ancient times, willow branches were usually cut into bundles and thrown into ponds to help the fish kept there survive the winter.

It is thanks to the strong antibacterial properties of salicylic acid, which is abundant in water willow, that the fish's water mold disease is greatly alleviated, allowing them to safely get through the winter.

Besides the willows commonly found by the water, we also discovered a banyan grove. While called a banyan grove, it was actually a forest of several large banyan trees and their aerial roots.

Banyan trees have well-developed aerial roots, so even if they are completely submerged in water, they will not die. Their aerial roots can breathe and take root, growing into new banyan plants like cuttings.

Like willows, banyan trees love water, and they are also very resilient and grow rapidly. Crucially, they also have some medicinal and economic value.

The leaves, aerial roots, bark, fruit, and resin of the banyan tree can all be used in medicine to treat various diseases such as influenza, whooping cough, tonsillitis, and rheumatic bone pain.

The bark fiber can be used to make fishing nets and artificial cotton, and tannin can also be extracted from it.

I plan to put these trees into the ark someday. In the days when oxygen is scarce, these rapidly growing trees will undoubtedly be the best oxygen-generating machines.

As I passed by some rocky areas, some rock vines caught my attention.

These vines are unlike the ones we've seen before. The smallest of these rock vines is as thick as a thumb, and they are extremely tough. They can be used directly as ropes to bear weight without any processing.

This incredibly resilient material will definitely be useful in many places on future giant arks. This one also needs to be moved; we can't let the *Prosopa spp.* ruin it.

I discovered many things along the way, and the more I saw, the more regretful I felt. If it weren't for the invasion of *Prosopa spp.*, these plants could have survived very well. Now, many of them would probably be extinct in this land.

All I can do now is bring as many different kinds of plants as possible onto the ark. If I can come back one day and wipe out the *Platycodon grandiflorus*, perhaps there will be a chance for it to reproduce again.

We don't know how big this land is, or whether it's like the world I knew before, consisting of several separate tectonic plates.

If that's the case, we can still find other independent tectonic plates to survive. The worst-case scenario is that this is a continuous ancient continental plate, in which case we have no way to escape.

There is no other way but to drift on the water. Perhaps we will become a new generation of Bajau people who live exclusively on the water.

However, given my personality, I wouldn't allow such a huge hidden danger to remain by my side. Even if there are other continents, it wouldn't be completely safe.

Water flow still has a chance to carry these fungi to any corner of the world, although the probability is small, but that doesn't mean they don't exist.

The xylem of Protoporphyra is also porous and has a certain buoyancy. Protoporphyra growing near water are very likely to fall into the water due to water erosion or hurricanes.

Mycelium can enter a dormant state under harsh environmental conditions, but I cannot be sure how long this state can last.

So my thought is still to find a way to eliminate these Protocera algae. Only by building the Ark can we continue to maneuver.

The most pressing issue in building the ark is time. Given the astonishing reproduction rate of the Protoceratops, it will spread to this area in just a few days. We need to devise a plan to delay their spread.

Therefore, I devised a plan, a plan that could only be implemented on a large, flowing river—the land enclosure plan.

Within a limited timeframe, we can only try to divert river water to the hinterland by digging ditches and canals. Water can be diverted using waterwheels to create a large area of ​​land surrounded by water.

The trees growing on these landmasses surrounded by water are the materials we will use to build the ark. Considering the immense scale of the project, building the ark could take many years to complete.

The maintenance of this ditch and the felling of the protozoan algae along its banks are therefore of particular importance.

These details still need to be discussed with the leaders of both tribes. Right now, the most important thing is to dig out that ditch as soon as possible.

In order to meet the deadline, we used the iron blocks we brought to forge hundreds of hoes and shovels for digging.

We have several hundred people in our group, but not all of them are skilled blacksmiths. The ironware we forge varies in quality; some are so crude that you can't even tell they're hoes or shovels.

There was no time to worry about the details, and the tools that were hastily made were put into production the very next day.