"The seven hundred upgrade points are still 100 points away from upgrading the shelter level. It seems that we can only upgrade the scientific research base."

Chen Nuo sat on the sofa and pondered for a while, finally called up the system upgrade equipment panel and chose to upgrade the scientific research base.

"Ding, you spend 400 points to upgrade and improve the scientific research base, and the area of ​​the scientific research base remains unchanged!"

When this passage from the system appeared, Chen Nuo had already taken the elevator to the third floor.

"Scientific research, bring out all the things you can make at present." Chen Nuo ordered directly.

There are seven days left, and a second wave of disasters will come.

Tens of thousands of underground core beasts will emerge from the pits caused by planetary debris.

By then, human beings will become food and save lives, and it will become something that ordinary citizens cannot hope for.

However, Chen Nuo knew that if he was hiding in a shelter, he would definitely be able to survive the second wave of liquidation.

However, it means that he has no chance of getting a lot of upgrade points.

Once these upgrade points are abandoned, his shelter can only stay at the current level.

After all, judging from the current situation, the daily upgrade point is no longer enough to enhance the shelter.

So, he wants to make weapons!

Make weapons that can kill underground core beasts!

While pondering in his heart, he looked at the various technological weapons and other equipment projected on the center console.

...

Gatlin: It takes five kilograms of iron, five kilograms of copper, and an energy crystal to make it!

Grenade: One pound of iron and one pound of copper are required to make it!

Cannon: It takes fifty kilograms of iron, fifty kilograms of copper, and two energy crystals!

Tank: It takes 100 kilograms of iron, 100 kilograms of copper, and ten energy crystals to make it!

Cannon shells: One pound of iron and ten pounds of gunpowder are required to make!

Tank shells: It takes five kilograms of iron, five kilograms of copper, and twenty kilograms of gunpowder to be made!

...

At this time, many powerful weapons were added to the weapons that the scientific research institute could make.

For example: tanks, cannons, and Gatlins.

These are powerful weapons to deal with underground core beasts!

At least, the power of the tank is still very huge. As long as you don’t encounter a thick-skinned monster, it should be easily solved.

But, these things needed...

This made Chen Nuo frown, but he made up his mind.

Within seven days, a tank or cannon must be made.

At least, in this way, you can kill monsters and get upgrade points.

While thinking this way, he also discovered the value of "energy crystal".

"System, I want to exchange 100 upgrade points for ten energy crystals!" He immediately ordered.

This is necessary. At least, if you are making a tank, the energy crystal is necessary.

"Ding, you spent 100 points to upgrade and purchased ten energy crystals! It has been stored in the material warehouse of the scientific research base!"

Upon hearing this, Chen Nuo nodded, and then continued to watch the technology currently available for the scientific research base.

Among them, there are some things that interest him.

For example, one of them is called Mecha Armor, which is a armor similar to the armored warrior, but it is relatively bulky, just like the first generation of Iron Man.

However, although it is bulky, it is still necessary to wait until your strength can be fought without any weapons.

After all, it can make others unable to recognize him.

Otherwise, if it is recognized, God knows what crazy behavior will humans do?

So, this naturally became Chen Nuo's must-order list in the future.

Secondly, there are other lethal weapons that also make Chen Nuo's eyes shine.

What excited Chen Nuo the most was because he found that after the scientific research base was upgraded, both the drone reconnaissance aircraft and the drone fighter he had purchased before could be upgraded!

Unmanned reconnaissance aircraft: Upgrading requires an energy crystal. After upgrading, the size of the unmanned reconnaissance aircraft will be reduced by one tenth, and the control system will be upgraded to a set route mode!

Unmanned fighter: Upgrading requires one pound of iron, 0.1 pound of pure gold, and one energy crystal. After upgrading, the launching of shells will be increased, and the control mechanism will be upgraded to automatic attack mode!

Seeing this, Chen Nuo's pupils couldn't help but magnify.

"0.1 kilogram of pure gold..." However, while excited, he was also a little silent.

"How much gold is needed to refine 0.1 kilogram of pure gold?" he asked.

"One pound of gold can only be extracted from 0.1 pound of pure gold!" The scientific research answer made Chen Nuo nod.

"How much material is left in the material warehouse? List it for me." Chen Nuo ordered.

As soon as the words were finished, the light curtain on the center console changed the picture.

"There are 5.5 kilograms left in copper, 10.6 kilograms left in iron, 2.6 kilograms left in gold, and 1.38 kilograms left in bricks and stones!"

At the same time, scientific research also replied.

Chen Nuo nodded and pondered.

"It seems that I have to go out to get some resources tomorrow." As he thought about something, he looked up and ordered:

"By the way, make me another Desert Eagle."

Because you have to go out, you need self-defense weapons, and shell pistols are obviously not the first choice.

After all, after going out, he faces people, not monsters.

As soon as he finished speaking, the robotic arms in the scientific research base began to work.

"There are two hundred upgrade points left, what are you doing?" Chen Nuo thought while walking towards the first floor.

However, after thinking about it, he decided to go to bed first and make plans tomorrow.

At night, he slept very peacefully.

But the people outside do not have his mentality.

Moreover, if people outside knew that he had lived so "comfortable" and "free" these seven days, they would probably have the intention of committing suicide.

...

At this time, it was located in an underground shelter in the Imperial City of Huaxia.

This is the shelter of the government's command.

Because the ground command disappeared, they moved here.

Together, there are naturally people from the Space Administration.

After all, they must always pay attention to planetary fragments.

At this time, when the vibration and roar disappeared, everyone was a little excited and puzzled.

Until, the space agency's people came to the news.

Then, everyone was relieved in unison.

"This sudden disaster finally disappeared!"

"Fuck! It's liberated!"

"The disaster...is over!"

"We are rescued!"

"Dog day! Have a drink all night tonight! I'll treat you!"

The people in the entire command center cheered.

Some people even burst into tears for this.

Some people also lost their closest relatives in the disaster and were silent in an extremely uncomfortable feeling.

You know, everyone was worried during these seven days.

Now, the feeling of relief in their hearts can even be imagined.

But soon, everyone became quiet.

They started working.

They have to re-access the entire Huaxia circuit and then transmit the message to all places in Huaxia.

Let people know that the disaster... is over!

At the same time, they also began to quickly reply to the entire China system that was paralyzed due to disasters.
Chapter completed!