There was a ticking sound of water on Roland's head.

The price of warmth in this cave is that it always has a humid dripping sound.

Just like a dream.

When Roland woke up, he was dreaming that he was taking care of flowers and plants in his small garden. Looking up, he could see that his daughter was holding the white fence and shouting his name loudly.

But when I woke up, everything suddenly became lost.

He picked up the kettle beside the bed and poured a large mouthful of it into his stomach. The entrance was a little salty and fishy, ​​but this was already a rare fresh water.

Although this underground cave is full of water, because its sulfur content exceeds the standard and the inorganic salts, drinking this kind of water is no different from drinking sea water, and it is even more fatal than drinking sea water.

Fortunately, only Roland is left here, so he relies on distillation to obtain fresh water, which is enough for drinking.

As for the usual bathing, the hot springs and muddy mud here are very beneficial for maintaining good health.

If it is before the sun goes out, such a hot spring hotel that is several hundred meters underground, whether it is traveling or hotels, it must be a very popular entertainment project. The daily income is more than just a money-making money?

Now I enjoy this hot spring bath alone, enjoying these super luxurious villas of tens of thousands of square meters.

Roland just felt very sad.

He has forgotten how long he has been here. Loneliness is something that can make people crazy. He has forgotten how many times he has sent out lonely distress signals to the old radio station, so that it has become his only meaningful thing every day.

He relies on this to practice maintaining language skills, fighting loneliness, and finding hope.

But—and later, the only meaningful thing became a desperate repetition.

At present - the only thing that makes sense to him is probably living itself.

Roland climbed up from his water bed.

Look around your room.

This is a rather simple cave, about thirty square meters in size, with a door and an electric lamp hanging above the head. A plastic curtain shed is pulled around to cover the top of the cave, so that the condensed water droplets will not hit Roland, and the whole room will become like a tree house in the rainy season, which will smell of rotten and mold everywhere.

But it's not much better now.

This is his penultimate light bulb. He has broken four light bulbs. If there is no cheap lighting provided by electricity, Roland must be forced to rely on inefficient lighting methods such as flames, which will consume his already precious oxygen here. However, given that Roland believes that he will not evolve night vision or infrared vision bug capabilities in a few years, light is the fifth important thing for him besides air, food, temperature, and water.

In such an environment, all existences that can survive are precious existences.

"Maybe on that day, I will need to drive the forklift out to shovel the snow again."

Roland said with some self-deprecatingness.

This is the most dangerous thing and sometimes it must be done.

Roland also has a simple set of cold-proof clothing. To put it bluntly, it is a layered sealed and pressurized clothing, a copycat product composed of an oxygen cylinder. However, relying on this copycat product, Roland can bring back about 200 kilograms of oxygen at a time with his small forklift. If the temperature is treated and sealed, these oxygen can keep Roland for a long time.

However, the oxygen content in this nest has been decreasing recently.

Those damn bats and mice chew, eat, reproduce, breathe, and excrete in this huge cave day and night.

Compared to themselves, they are more like the owners of this cave.

If there is not enough oxygen, of course I will die.

The outside world is full of oxygen. The light blue crystals condensed into ice will be liquefied and then vaporized into precious vitamin gas as long as they are placed in a slightly warm place.

While thinking about this, Roland reached out to open the gate of the water bed beside him, and only saw a fresh and cold air flow gushing out from it, bringing some coolness and comfort to this cramped room.

Roland's water bed was not ordinary water, but it was actually a bed of liquid oxygen.

Compared to ordinary distilled water, oxygen is what Roland needs more. Although this thing is everywhere outside, only the precious oxygen that can breathe into the mouth is precious.

This bed of liquid oxygen is one of Roland's most precious treasures.

At this moment, a fierce ringtone suddenly rang in the whole room.

"Dingling Lingling Lingling Lingling!"

The sound suddenly echoed, which scared Roland.

His first reaction was to close the gate of the water bed, huddled in the bed wrapped in the bed, shivering, and when the ringtone finally disappeared, he leaned out his head and revealed his head.

An incredible look appeared in his eyes: "Has someone else entered here?"

"And triggered the plague trap?"

His expression was distorted and ferocious, and he could not see any joy at all.

Although he has been using the radio station to try to contact survivors, just like Ye Gong Haolong, someone will feel great hope and courage when someone writes back from afar.

But if someone really tries to invade this cave, he wants to plunder his treasures.

Then, it is his only enemy.

Roland's expression changed drastically, and his whole body was trembling.

Survive or destroy.

This is a problem.

He took a deep breath in the water bed, time and time again.

Finally, he stood up slowly with trembling and even trembling, and then took out a smooth and dark pistol from under the pillow.

Put on my boots and walked out the door.

This is a battle of defense.

Defend your own home.

Roland said to himself silently.

...

...

Lu Yuan and Su Mei are still moving down in this long and endless cave tunnel.

The process was long and boring.

The previous group of rats did not cause much trouble to the two people, but it caused a lot of uneasiness.

There seems to be a considerable number of living creatures in this cave, so what is the living state of the humans in it?

"The road is long." Su Mei said.

"What?" Lu Yuan asked.

"I always feel it." Su Mei frowned: "People here may not welcome us."

Lu Yuan nodded: "This is what was expected."

"If I meet a living human when I take you on this ice field, my first reaction is to kill him."

"This is a situation that was deduced by the laws of the Dark Forest before."

"This chain of suspicion has no end, but we don't have any chance of tolerance."

"I won't let you suffer a 10,000-thousand-thousand-possible loss unless it's necessary to keep it in order to survive."

Su Mei turned her head: "So why are we here now?"

Lu Yuan smiled: "Because--"
Chapter completed!