Feng Mengyue's ethereal voice echoed continuously in his shelter and only stopped after the message was repeated for the third time.

It was a short message with few words but contained a great amount of information.

In the wilderness, ruins were generated at random. If pieces of glass scavenged at the periphery had such quality… 

With that message in his mind, Su Mo took out the two pieces of glass to take a closer look. 

[Blast-resistant Glass (excellent): Strength 15, corrosion resistance, acid resistance, impact resistance]

[Blast-resistant Glass (rare): Strength 50, corrosion resistance, acid resistance, impact resistance. After impact from wear and tear, light can slowly restore the strength of the glass]

Compared to the excellent quality glass, not only was the rare quality glass frighteningly stronger, but it even had a powerful additional magical property.

After Su Mo thought about it, he decided to put the rare quality glass at the outermost edge and used the excellent quality glass as a damper that he would use in case of a disaster.

After confirming the construction plan once more, Su Mo tried to pinpoint the center of the base from the outside and started digging with his wooden shovel.

Even though the blast-resistant glass certainly had great tensile strength, the soil itself would not be able to withstand an extra-large impact.

"I'll need to reinforce this tunnel with iron to make an iron pipe with better toughness. It'll be better to use iron to set the glass in place when the time comes."

After digging out a tunnel that was a little less than half his height, Su Mo first put down a unit of iron, then two pieces of glass and two mirrors on the side, as well as piled up the rest of the iron before he went back inside his base.

He fixed his gaze and focused on the wall above.

As expected, a new facility installation option appeared before Su Mo.

[Ventilation and lighting facility?]

First upgrade option: Periscope structure, pig iron piping, corrosion-resistant coating, water barrier coating. Survival points required (105 - 90)

Second upgrade option: Electrical ventilation structure. Skylight design, good lighting, sufficient airflow. Survival points required (700 - 65)

Comment: Is this black ceiling going to be your ventilation and lighting? Are you for real?

It was a familiar predicament and familiar upgrade options. Su Mo smiled and chose the first upgrade option.

When he got up that morning, his survival points were replenished to 103 points. After his upgrade for the psychic energy water well and using up 70 points, he was left with 33 points.

After deducting another 10 points from the two Japanese Oak Spears and 5 points from ceramic plate armor, he was left with 18 survival points.

That was just enough for the first option's 15-point requirement.

There was a flash of light and the floor began to tremble as if there was a pair of invisible hands reshaping the terrain.

Su Mo watched as an opening suddenly cracked open in the initially black ceiling, and the iron blocks on the floor began to melt, turning into iron liquid as it rushed into the opening.

The silver pig iron was reinforced with the system's coating and gradually turned into a hopeful sky blue color.

At first, there was only some meager light on the ground, but after five or six seconds, a column of light came straight down the middle of the shelter.

Sunlight!

Shining in directly!

It was soon followed by the crisp, fresh air of the outside world!

Su Mo stood right beneath the pipe and looked upward. Immediately, he was met with the painful glare of sunlight.

Although Su Mo's heart was surging with joy, he did not let it distract him. He immediately opened the shelter's wooden door and went to the ground right above his base.

The initial hole that he dug had disappeared and was replaced by a small, natural opening.

50cm x 50cm blast-resistant glass was erected on the ground, polished with a special camouflage coating.

In addition to the ability to absorb light and repair itself, all the light that converged on the glass did not undergo strong refraction or scattering. Instead, every particle of light was reflected inward, further improving the concealment of the system.

[Blast-resistant window: Strength 50, coated with optical camouflage coating and a water barrier layer. Has high dual performance and property for ventilation and lighting.]

Comment: With a window like that, even Old Wang next door won't be able to see what you're doing.

"The mighty system lives up to its reputation! The initial plan was to punch holes in it so that it can help with ventilation, but now the micro-perforated holes not only allow ventilation, but also act as a water barrier! Great!"

After he collected the remaining materials and returned to his base down the steps, Su Mo finally felt comfortable with the slight cool breeze from the light opening.

It was only the second day but he had done most of the work required to survive the first disaster.

He had a steady source of water, light, and air!

He just had to find a way to create a drainage facility with the remaining time and he would be all but guaranteed to survive the acid rain disaster.

It was already five o'clock in the afternoon, so even if he wanted to head out, he could only chop some wood or cut some plant fiber or something.

After attacking the chameleon that morning, Su Mo decided not to venture out before the Monster Illustration Handbook's scan count was refreshed.

He took out a piece of Dalieba, split it with his stone axe, soaked it in psychic energy water, and munched it down.

Su Mo started his work for the night.

Whenever Su Mo listed a batch of psychic energy water on the trading market, it would immediately be traded off for double the amount of iron blocks compared to the singular units he was getting at noon.

In order to uphold the principle of not disrupting the market system, after he completed his trade this time around, Su Mo inquired about the reason that there were so many iron blocks on the market.

Su Mo took his place as an example. There were mainly wood and plant fibers nearby his place which could be obtained with little physical effort.

As for other things such as minerals, there was no way for him to get them.

After looking around, there was not a trace of such things.

However, just because Su Mo did not have it in his area, it did not mean that others did not.

There were a large number of people in the world that spotted huge mines exposed in the ground as soon as they descended.

Once those people crafted a stone pickaxe, they would be able to mine many rocks and the occasional iron blocks with just a little effort.

Since there were more people, there were more people mining it, which increased the yield. That was also one of the reasons why there was a large number of iron blocks flowing into the market, resulting in its devaluation.

In addition to that, while he did his window-shopping, Su Mo also acquired some items without knowing what they were capable of. For example, he exchanged 100ml of psychic energy water for the core components of a generator.

[Rotor]

Quality: Good

Introduction: A rotating body supported by bearings. A disc or other object without its own axis of rotation can use this as a rotor when rigidly connected or attached at its axis.

Comment: Spinning, jumping, I close my eyes…

Although the rotor was only one small component for the generator, Su Mo was willing to buy it and tuck it away for the bright prospect of restoring the glory of civilization.

After buying the rotor, before Su Mo could admire it, he noticed another fine item added to the listings on the trading market.

Large Scale Vegetable Culture Medium!

Su Mo eyed it eagerly and could not help but exclaim with great joy.

"It's true that most people have whipped out the quality goods to trade for supplies in the first few days!"

Currently, more than ninety-five percent of the players' food were supplies from treasure chests.

To get a better picture of it, there was no seasoning and no methods to cook the mutant beasts killed by the fiercer players. Also, if the people were not starving to death, no one would willingly eat such an unknown thing.

If the people were not able to find many treasure chests, a large group of people would probably die of hunger in a day or two.

That was why Su Mo selected the underground shelter during the first day. To construct a place that could produce food for the long run was his goal and what Su Mo planned since that moment.

If the culture medium never appeared, Su Mo would have taken the initiative to plow some soil to try and construct an ecological environment in the shelter after a day or two.

Otherwise, it was impossible to tell whether the soil on the surface could still be cultivated to grow plants after the first acid rain disaster.

As Su Mo looked at the requirements on the trading panel, he began to take stock of the supplies he currently had and was determined to buy the culture medium.