It would be difficult to cause such friction until a fire occurs.

I found some white vines and, with the help of some slips of paper with better flexibility, I made a bow out of them. This bow was not lethal, but was only used to wrap around a stick to make fire.

I first used a knife to dig a small hole in the wooden stake, and then planted the wooden stick in it.

Now I have everything I need, all I need is some hay to start the spark.

I searched everywhere but couldn't find it. Just as I was wondering if I was going to freeze to death, I found some weeds in the cave.

These weeds have dried up, probably due to years of growth.

Now that I have the hay, the first thing I need to do is rub it into charcoal.

Drilling wood to make fire is a long process. It took me about dozens of minutes just to make the surface of the wood pile produce chips and charcoal.

As I drew the bow, I felt my body gradually warming up.

The sawdust turned into carbon little by little, which gave me great encouragement.

"Try harder"

I increased the frequency of rotation, and as the wooden stick turned, smoke gradually appeared inside the wooden stake.

The smoke grew thicker and thicker, and I could vaguely see sparks coming from some of the charcoal.

While the sparks were burning, I quickly wrapped them with hay.

There is little oxygen in the cave.

I blew the hay hard towards the entrance of the cave.

Hard work pays off. I almost died of suffocation because of this fire.

The hay finally caught fire, and I quickly put the burning hay on the grass and wood that I had prepared in advance.

Finally, the fire was rekindled in the cave, and the long-lost warmth instantly spread throughout the body.

When the charcoal burned enough, I hurried to find some stones to build a frame. I found a large flat stone.

There was no water in the cave and no water source around, so I could only simply clean the dirt off the stones.

I plan to sear the mushrooms on the rocks.

I can naturally tell whether a mushroom is poisonous or not, so I am not worried about eating it like this.

I plan to open the coconut and drink it while the mushrooms are still hot.

But the coconut shell was too hard, and I only had a small knife, so it took me a lot of effort to open it.

I have been on the island for almost a day, and I haven't drunk any water yet, which makes me very thirsty. The rain outside has stopped at this time.