A faint blue glow dissipated in front of my eyes.

With the fall of the system prompt, the overall structure of the Guixu has become a little different from before.

Meng Lei stood in the living cabin and looked around.

Although through the exterior of the interior, the surface is not noticeably changed much.

But he could faintly feel that the structural layer that took place between the outer shell and the inner wall seemed to be more sophisticated than before.

Meng Lei took a deep breath with a hint of a smile on his face.

Don't look at the distance of 300 meters is not a lot, it takes less than a minute to run on land.

But if you change it to a vertical drop, it is more than 100 stories high!

Such a large span is enough for the Guixu to dive into some small abyss.

However, this level of improvement still did not reach the ideal value expected by Meng Lei.

Nowadays, there are still a lot of materials hoarded in the warehouse, and keeping them also takes up space.

Meng Lei's principle is to make the best use of things.

The most important thing is to use everything you can to strengthen yourself.

Therefore.

Meng Lei continued to target the submarine structure, and made two more upgrades in a row.

It was not until the compressive limit of the Guixu was raised to a depth of 3,200 meters that it gave up.

"The water depth of 3,200 meters adds 700 meters to the upper limit of compression resistance compared to the initial structure."

"This level of extreme pressure should be enough for me to dive down a long distance."

All of a sudden, the extreme pressure resistance of 700 meters has been increased, which is equivalent to the average depth of the largest freshwater lake in Bluestar.

Meng Lei felt that at least until he arrived at the No. 1 gathering place, he should not need to make any more modifications to the submarine structure.

You know, the transformation of submarine structures is quite resource-intensive.

The transformation of the submarine structure directly across the three levels consumed a total of one-third of the reserve resources in his warehouse!

The resources of nearly 200 units are gone.

If this is left to other players, I am afraid that even if they work hard for three days, they may not be able to accumulate such a huge resource reserve.

Therefore, Meng Lei judged that the depth of the sea area where the No. 1 gathering place is located should be about 3,000 meters, not deeper.

Otherwise.

Of these 100,000 people, one percent of them will finally arrive on time, and that is to burn high incense!

"Next, it's the sonar detection system......"

Click the upgrade button on the retrofit table again.

Retrofitting sonar detection systems does not require the use of synthetic materials such as rebar.

Only the most basic resources such as iron, copper, and carbon are needed.

Therefore, the moment Meng Lei's finger touched the screen.

The corresponding resources were extracted in an instant, and with it, a pale blue halo shone from the cockpit again.

By the time Meng Lei opened the cockpit door, the upgrade of the sonar detection system had already ended.

What you see is a sonar display that is much more sophisticated than it looked before.

In addition, the 3D virtual map projected on the side of the driver's seat has twice the size of the previous one!

[System Tips: Congratulations on completing a sonar detection system transformation, the detection range has been enhanced to a certain extent, and the current sonar transmission limit is 1000 meters!] 】

Take a look at the upgrade options for the sonar detection system.

Even if you take the sonar system to the top, there are only three levels.

At that moment, Meng Lei did not hesitate to upgrade the sonar system to the full level.

This time, it didn't cost much material.

For the first time, the upgrade options on the retrofit table have changed radically differently from before.

[The primary sonar system (3/3) cannot be upgraded, and a more powerful sonar detector needs the corresponding blueprint to unlock!] The current sonar transmission limit is 2000 meters! 】

Staring at the system prompt given by the transformation interface, Meng Lei touched his chin thoughtfully.

It wasn't the first time he'd heard of blueprints.

However, so far, he has not seen a single player salvage the blueprint at this stage.

At the very least, no one in the communication channel mentioned it.

No one in the trading market or auction house has ever put out the source of the blueprint.

It can be seen that various equipment and transformation blueprints should not be accessible to players at this stage.

Or maybe someone gets some kind of blueprint but deliberately hides it so that it doesn't come out to the surface.

Or you want to keep it for yourself.

Either that, when most people have gone through the difficult period of clearing the wasteland and have a little more money on hand, they will sell it for a good price.

Meng Lei didn't care too much about this.

He's always had a good mentality.

Blueprints are such precious items that are hard to find.

If you have the opportunity, you can get it in your pocket and strengthen your body, so you can't let it go easily.

If you really don't have that fate, you can't force it.

Anyway, at this stage, he is already far ahead of everyone.

The point is, he still has a golden finger!

During the voyage, the chances of discovering hidden treasures are much greater than anyone else's.

Naturally, this concern does not exist.

After getting the upgrade of the sonar detection system, the last step is the submarine hull.

It was also upgraded twice in a row, and the submarine hull was reinforced.

The more than 600 units of resources that have just been harvested have shrunk by more than two-thirds sharply!

I have to say that upgrading and transforming submarines is really a costly project!

In the end, it is not that Meng Lei is reluctant to continue to waste, but that the reserves of perovskite can no longer meet the needs of the third transformation.

As a last resort, Meng Lei could only give up temporarily.

After this transformation, the overall evaluation of Guixu has been improved from H to H+.

Although the evaluation level has not changed, there is an extra plus sign, which invisibly makes people feel tall.

It is estimated that after Meng Lei will transform all the columns in the list and upgrade them to the full level, the evaluation level will reach the G level.

But none of that matters.

With the current ability of the Guixu, as long as Meng Lei himself does not die and operates in the shallow sea area, there should not be much danger.

With a long breath, Meng Lei crossed Erlang's legs and lay crookedly on the simple air cushion bed in the living cabin.

Mei Zizi looked around, her eyes swept over the fresh water extractor and the electromagnetic gun loader one by one, and looked at the results of her current efforts with satisfaction.

With a great sense of accomplishment, he is looking forward to the next diving trip.

At this time, I don't know if it was because I drank too much water just now.

Suddenly, a burst of urine struck, and Meng Lei was shaken all over.

He rolled over and ejected from the hoverbed with a harrier roll and looked around in horror.

In the end, Meng Lei suddenly discovered an extremely terrifying question!

"Damn, there doesn't seem to be a toilet in this submarine?!"

From the beginning of the game to the present, all his energy has been focused on how to survive, and he has not felt any desire to excrete from beginning to end. Hope!

Now that he was finally relaxed, he finally realized the problem.

But after searching the cockpit and living compartment, he was desperate to find that the game did not have excrement facilities for the player!

This damn is a little scary!

Pair. Legs clamped in place and scratching his head, Meng Lei struggled for a long time, and finally set his eyes on the closed airlock chamber door.

"Or ......"