On the morning of the fourth day, the system's wake-up service arrived on time. I opened my eyes, waved at the drone, and it took off.

To avoid worrying about food too soon, Ye Zi did not take the Thousand-Pound Pill while she was hungry, but planned to take it when she felt hungry.

After getting dressed, I drank some cool boiled water and then started paving the ground with stones.

An hour passed quickly, and Ye Zi finished laying the ground in an hour.

The next step is to build a wall using tree trunks, and grooves should be cut into the sides of both ends of all the prepared tree trunks.

Don't throw away the tree trunk debris from the grooves; it's a good material whether you use it to fill gaps or let it dry to use as kindling.

With the immense strength of 4,000 jin and the powerful tool of a fire axe, the work of opening the grooves progressed quickly, with each groove being completed in an average of five or six axe strokes.

The tree trunks are about 30 centimeters in diameter, and the shelters are two meters high. Each wall needs seven trunks, so four walls would require 28 trunks. When the leaves are being cut down, 20 trees are felled.

Except for the branches, they are all divided into lengths of three to five meters.

Thick tree trunks can be used to build walls, while the thinner top sections, with at least 15 centimeters remaining, can be used as roofs. The rest can only be used as firewood, or, if time permits, to make some simple furniture.

Around noon, the grooves on the side of the trunk were finished, and the leaves also seemed hungry.

Under the pretext of releasing water, he took out a Thousand-Jin Pill and swallowed it, then continued with the next step of his work.

Construction has officially begun.

The walls behind and to the right don't need any special treatment; you can just install the tree trunks directly from the grooved areas.

There is a fireplace on the left. The five-meter-long tree trunk needs to be processed again. It should be cut according to the position of the A-frame support above the fireplace, and a groove should be cut in the cross-section.

One end is stuck to the tree trunk behind it, and the other end is stuck to the A-frame.

The front of the tree trunk also needs to be treated, because a door needs to be placed on the front.

On either side of the door, less than two meters on one side and less than one meter on the other, the tree trunks on either side of the fireplace have grooves cut into the side of one end and the cross-section of the other end.

The groove on the side fits into the tree trunks on the left and right sides, which serve as walls, while the other end rests against the doorpost.

As darkness fell, Ye Zi had only finished working on the four walls; the roof would take more time and could only be completed the next day after dawn.

It's still the same routine: taking a shower, doing laundry, and then going to sleep, only the conditions are getting better and better.

The viewers in the live stream didn't understand why Ye Zi was so insistent on taking a bath and washing clothes. They were in the wild, and there were no spare clothes. Plus, it was cold at night, so taking a bath and washing clothes didn't seem like a necessary thing.

Other live streams also featured contestants surviving in cold climates, but nobody did that.

The viewers in the live stream didn't understand, and neither did Bingbing, Bingwang Zhuangyan, and Sister Sparrow.

As for Bingbing, she's a complete novice when it comes to survival skills. The knowledge she shares in her live streams is either something she's crammed on recently or the result of searching online during the live stream.

Although Sister Sparrow is the top female survivalist in China, she has almost no experience in surviving in cold regions.

Although Zhuang Yan, the king of soldiers, had experience surviving in cold regions, it was only during missions. He was content with just a sip of hot water and a full meal, and had no energy to think about taking a bath or washing clothes.

Although I don't understand, I won't force an explanation, because I really don't know how to explain it.

Huang Jingyu and Tong Erya, though they didn't understand, were quite satisfied with the shelter Ye Zi had prepared.

Although the shelter didn't look big, it was enough for the three of them to rest, and judging from the tree trunks that were at least 30 centimeters in diameter, the shelter's protective capabilities should be quite good.

As long as the door is secured, even if there's a bear outside, the three of them inside won't have to worry.

The two exchanged messages, sharing their thoughts on the shelter and worrying about Yezi's health again, since neither of them had seen Yezi eat anything, only drink water.

Huang Jingyu reiterated that Ye Zi seemed to be in good spirits and should be fine; once he arrived, the problem would be resolved.

This is not just talk, because the yellow whale's arrows are indeed quite accurate.

Moreover, he had already decided what tools he would bring.

Tong Er Ya hardly ever had this problem, because the first survivor could carry ten tools, the second could carry seven, and the third could only carry five.

She was the third person and only had five tools. If she had enough survival tools, she only needed to think about herself.

Underwear, outerwear, and a pair of shoes—that's all you need for five spots.

The next morning, just as dawn was breaking, Wei Yi was woken up by the system.

Today's work includes not only fixing the roof, but also backfilling the soil between the shelter pit and the wooden wall. In addition, the fireplace chimney needs to be covered with stones to prevent smoke from backflowing.

Finally, I need to get a bed. I don't want to sleep on a pile of leaves anymore; it's really uncomfortable.

It's the same familiar process: greet the drone, get dressed, drink water, and then get to work.

Instead of simply covering the roof with a single layer of wood, Ye Zi plans to make it in an A-frame shape so that water won't easily accumulate.

Even if a wild animal jumped on it, it wouldn't be easy for it to stand firmly.

This time, even more grooves need to be cut. A groove needs to be cut at one end of the trunk, and another one needs to be cut at the other end after rotating it ninety degrees.

These four tree trunks can be fitted together to form a two-person A-frame, which can be fitted onto the top of the wooden wall.

The tree trunk in the middle, which serves as a beam, doesn't need to be rotated 90 degrees, but it still needs to have a groove cut into it to fit at the top of the A-frame frame.

Next are the two sides. The tree trunks used are those reserved beforehand, with a diameter of more than 15 centimeters, and branches that meet this standard. Of course, these branches must be straight.

These tree trunks and branches also need to be treated. Cut off a small portion of the cross-section and do the same on both ends so that they can be wedged between the wooden wall and the roof beam.

The middle part of the herringbone shape also needs to be filled. These are tree trunks that are over 30 centimeters long. The cross-sections at both ends are grooved, and the trunks get shorter as they go up.

It fills the herringbone-shaped space perfectly. The small area at the very top doesn't need to be filled; it can be left as a ventilation hole. Later, when we have animal fur, we can use fur to plug it in for easy opening and closing.

After finishing all that, it was already past noon. I took another Thousand-Pound Pill to eliminate my hunger.

Then came mixing mud, moving stones, and building chimneys.

Finally, there's the filling of soil, which is a huge task. To keep the walls warm, the outside of the wooden walls has to be covered with soil, all the way up to the roof.

Although it will be dark inside the shelter, the lack of light is negligible compared to the need for warmth, and the shelter also has fireplaces inside, so the firelight can still provide illumination.