In the shelter, Chen Nuo was looking at the picture transmitted back from the camera on the screen in front of him.

At this moment, an extremely dazzling light suddenly appeared in the black hole in the picture!

At the same time, Chen Nuo could see that the pictures sent back from the camera were slightly vibrated!

Seeing this, Chen Nuo narrowed his eyes.

This kind of movement seems to be a fire of an energy-gathering cannon!

Thinking of this, he couldn't help but worry about whether the power of the energy-gathering cannons would be damaged by the great power.

But soon, as they flew out of the black hole, Chen Nuo breathed a sigh of relief.

"System, how many upgrades do I have now?" Chen Nuo asked.

“23456 upgrade points!”

"Damn it?" Hearing this, Chen Nuo's pupils dilated and he suddenly stood up.

More than 20,000 upgrade points per shot?!

So powerful?!

this…

He was a little confused.

"Ding, the energy-gathering cannon has a great power, and its range can even reach 20,000 meters. Even if only five energy crystals are placed, their power is enough to destroy a small city!"

The system prompt sound appears, and then the system says:

"Because of the power of the energy-gathering cannon, the one shot just now has covered the core wolf underground, so he has obtained so many upgrade points!"

This time, Chen Nuo's systematic answer made it clear.

"So that's it... In fact, fighter jets can fire energy-concentrating cannons at a depth of 10,000 meters. There is no need to let them attract the attention of these nuclear birds before firing them?"

Upon hearing this, Chen Nuo pondered for a little.

However, when he thought about it, the number of upgrades for this shot was more than 20,000 yuan, and he couldn't help but be excited.

However, he did not take the lead in deciding on the use of these upgrade points, but instead considered it carefully.

At the same time, Fighter One and Two soon returned to the shelter.

At the same time, I also told you all about what I just experienced.

"Recoil..." Chen Nuo murmured when he heard the recoil from the fighter jet 2, and at the same time dispelled the idea of ​​using more than five energy crystals next time.

"You guys did a good job this time. Take a break and continue to go later." Chen Nuo nodded and said.

Upon hearing this, the two of them smiled first, but soon their smiles solidified.

For a moment, their expressions on the entire screen instantly solidified.

The atmosphere began to become a little subtle...

What...goes still?

In their hearts, incredible thoughts emerged.

"However, this time, you don't need to take risks like you did just now. After my observation, you can actually fire energy-gathering cannons at 10,000 meters underground!" Chen Nuo looked at their expressions on the screen and said with a smile.

Hearing this, they reacted, hesitated a little, and then said:

"good!"

Chen Nuo nodded and said:

"Here are one hundred energy crystals, and today your mission is to use them."

As soon as he finished speaking, Chen Nuo spent 1,000 upgrade points to buy 100 energy crystals from the system, and then asked the system to place the energy crystals on the desktop.

Seeing this scene, the expressions on the screen of the two men suddenly became stiff.

One hundred...

this…

Can be launched twenty times...

In other words, we have to go out and fire twenty energy-gathering cannons?

this…

"Of course, a monster in a black hole may not be enough to withstand so many shells. At that time, you will find other black holes by the way. In short, after using these energy crystals, your mission will be over."

Chen Nuo stood up, patted their shoulders, and said earnestly.

These are all contributing to mankind...

He couldn't help but think of it, and then went back to the room to start resting.

As for fighter jets 1 and 2, they stared at the energy crystals on the table in a daze.

Then, looking at each other, the eyes on both sides could not help but blink.

...

At the same time, Chen Nuo's room.

"The twenty-degree heater can just cover the low temperature that is currently transmitted from the outside. I just don't know how many degrees the heater will turn on when it is zero or 100 degrees below zero to make the shelter less cold." He analyzed secretly.

"However, this time the disaster lasted for a month, and almost all the outside was covered with heavy snow, and I couldn't even walk. It would be better not to go out for the time being during this period."

After thinking about it, he thought of the retreat room.

"It's one month... I can practice in the retreat room." He touched his chin and murmured, then ordered the system:

"System, how many levels can my current upgrade point be upgraded to the retreat room?"

"Level 3!" The system's answer made Chen Nuo stunned.

If you have more than 20,000 upgrade points, you can only upgrade to level three?

However, after thinking about it, the concentration in the retreat room is now 45%, and the increase in the third level is 60%.

This concentration is pretty good.

"Forget it, upgrade it for now." Since the shelter does not need to be upgraded for the time being and other equipment does not need to be upgraded, Chen Nuo decided to plan to upgrade.

Besides, Fighter One and Two will go out to help him get upgrade points later.

Therefore, he is not afraid that the upgrade points will be used up.

"Ding, you consume 22,400 upgrade points to upgrade the retreat room to level 11. The area of ​​the retreat room remains unchanged, and the concentration of spiritual energy is increased from 45% to 60%!"

"How many upgrade points do I have now?" Chen Nuo nodded and asked.

“1056 o’clock!”

"More than a thousand..." Chen Nuo pondered.

"Let me change one hundred talent pills." After thinking about it, Chen Nuo directly ordered.

After all, the retreat room has been improved, so it is impossible for him to not purchase talent pills to improve his own talent.

"Ding, you spent 1,000 upgrade points to buy 100 talent pills!"

When the system prompt sound appeared, a hundred talent pills appeared out of thin air on Chen Nuo's bed!

Seeing this, Chen Nuo took over the box that had previously installed the talent pill.

There were still thirty talent pills left inside.

Adding these hundred pieces will be one hundred and thirty pieces.

It should be able to be upgraded to the heavenly myth at one time.

After thinking about it, Chen Nuo breathed a sigh of relief.

So he lay on the bed and began to think about his next plan.

...

At the same time, due to the changing weather, the surviving people in the world became a little nervous.

At the same time, countless people couldn't help but think of the previous news.

The sun spot is about to explode and the temperature will continue to drop to minus one hundred degrees!

At this moment, the government suddenly came back to its senses.

However, because they only care about getting people to the shelter of the capital in the past few days, they have not taken any protective measures for this.

So, the government was also confused.

However, they quickly issued an order to stop transporting survivors from various urban areas into the capital.

And let the official shelters in the capital or urban areas start to significantly increase various heating devices.

At the same time, let the scientific research department produce protective clothing that can withstand the temperature of minus one hundred degrees Celsius.

But even so, people are panicked.

After all, one hundred below zero!

This is not just a joke!
Chapter completed!