Six days went by in the blink of an eye.

At this time, Lin Yu's workshop has changed greatly, a lot of equipment and materials have been piled up, and on the table at the innermost end of the workshop, a gray-yellow backpack has begun to take shape.

Thanks to the saline upgrade, he also has a new understanding of his abilities.

It's good to upgrade a complete item directly, but in fact, the ability can also be used to upgrade equipment and semi-finished materials, and with the successive live broadcasts, the space backpack has almost been perfected little by little under the attention and expectation of the audience.

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【Void Kangaroo Organ Preservation Solution・Change】

[Grade] LV3: 84/60000

[Introduction]: The organ preservation solution specially prepared for the void kangaroo can stimulate the dormancy mechanism of the void kangaroo and provide essential nutrients for survival, so that the isolated organs can be in an active state for a long time.

[Evaluation]: Am I dead? Still not dead?

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This is a third-level organ preservation solution, the only difference is that he did not upgrade directly, but tried to add the extracted Void Kangaroo Milk to it.

His initial idea was not wrong, the milk of the Void Kangaroo was indeed one of the necessary conditions for the Void Kangaroo to enter a dormant state, and he mixed some milk in the second-level organ preservation solution and upgraded it again, the experience requirement was slightly increased, but it also made the two perfectly mixed into a new organ preservation solution.

Of course, there is a more important point, that is, the mixed and upgraded organ preservation solution can be affected by the effect of empirical repair, as long as there is experience, the energy source will be replenished, so as to avoid the trouble of analyzing the composition structure of the milk.

Then there is a cylinder the thickness of an arm, with pipes and metal caps at both ends, and a transparent shell in the center.

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【Simple thermostatic perfusion】

[Grade] LV3: 26/40000

[Introduction]: A simple perfusion device that excludes various testing equipment and dialysis equipment.

[Evaluation]: You call this thing an infusion device?

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This is upgraded by him with a micro water pump and some pipelines, which is very similar to a disposable perfusion, there is no detection or dialysis, and all parameters must be debugged and set by themselves, to put it simply...... It's still a water pump.

Its only purpose is to connect some of the blood vessels of the Void Kangaroo, and then let the organ preservation fluid replace the blood of the Void Kangaroo to achieve self-circulation and constant temperature.

It has to be said that the Void Kangaroo is definitely a well-deserved model kangaroo, after using these two things to maintain its activity, some of its wounds and exposed fine blood vessels are gradually healed, and then the use of temperature regulation and decreasing nutrient supply makes the nursery bag enter a stable dormant state.

Isn't it an exemplary representation of the 'material' that cooperates with the experiment?

At this point, the foundation of the space backpack has been completed.

Later, Lin Yu took local materials, used the fur of the void kangaroo to make it simple, and then asked the 'professional' mother to sew a prototype of a backpack for herself, and installed the nursery bag and life-support device at the bottom of the backpack.

"Alright, the assistive wearable system is also complete."

Connecting a piece of battery removed from the hydraulic gauntlet, plugging it into a fixed pocket specially set aside in the backpack, Lin Yu showed a smile full of accomplishment.

In addition to the organ preservation solution and perfusion, the whole backpack can be said to have been designed by him, the backpack is also a backpack style, but there is no zipper on it, the mouth of the bag is directly open, and the opening is relatively large, similar to the state of the schoolbag zipper is completely opened, and the space inside the backpack presents a V-shaped structure, and the bottom is aimed at the empty kangaroo's nursery bag, and the vacant parts are various pipelines and parts.

These parts are made by him with sensors and small motors to assist in wearing hydraulic gauntlets, which can be automatically attached and fixed, but the backpack is not very convenient behind the back, so the two gauntlets are fixed by small motors and mechanical structures, and the gauntlets are lifted up to assist in wearing when he wears them.

"Done?"

"Try it out and let's see how it works."

"You may not believe it, but in the past few days, I feel like I'm really watching Iron Man make Mark armor."

"I feel the same way!"

“+1！”

Hearing the news of the completion, not only Lin Yu was full of a sense of accomplishment, but the audience who watched the space backpack be completed little by little through the live broadcast was also overjoyed.

Lin Yu himself couldn't wait to try it, and happily accepted everyone's proposal, first put on an arm armor and lifted the shield axe and stuffed it into the backpack.

Part of the space close to the pouch is within the influence of the pouch, and the position of the pouch has also been specially adjusted, so the shield axe begins to 'shrink' as soon as it approaches the mouth of the backpack, and the more it is stuffed, the smaller it becomes, and the backpack that is obviously not very deep actually engulfs the entire shield axe, leaving only a small section of the grip that is exposed to the outside protruding from the center of the backpack.

Two hydraulic gauntlets were also stuffed in, but this time they were tucked in at an angle from both sides of the backpack opening, so that when you put the backpack on your back, you can just turn your hand over and fit into the hydraulic gauntlets.

Click!

Shove the hydraulic gauntlet until only a small section remains, and the subtle sound of parts moving can be heard from inside the backpack.

This is the 'auxiliary wear system' that stucks the hydraulic gauntlet, and when Lin Yu wears it, the hydraulic gauntlet will be supported by sensors and motors.

"Alright, let's try the fruits of our labor."

Lin Yu smiled, called up the panel of the Xueba system and played the BGM of Iron Man's first test flight, and then put the backpack on his back.

Slightly a bit heavy.

The Void Kangaroo's pouch is not truly a space of its own, so even if it can hold items, its weight is not reduced.

Fortunately, he was wearing a venom suit at all times, and after being pressured, the lines of the venom suit instantly hardened slightly to resist the pressure, which greatly cushioned his burden, which was similar to the state of holding a shield axe with hydraulic gauntlets, and it was still within the acceptable range.

Click, click, click!

As the BGM gradually became higher, Lin Yu's hands were also put into the hydraulic gauntlet, and the sound of the machine bracket continued one after another, and the mechanical structure in the space backpack lifted the hydraulic gauntlet, and the hydraulic gauntlet was quickly tightened and fixed, and the shoulder armor fell and covered and stuck.

In just a second or two, when Lin Yu pulled out his arms again, the hydraulic gauntlets had already covered his arms just right.

"Next up is the shield axe."

With his forearms raised flat in front of his chest and clenched into fists, Lin Yu moved his palms behind his head again, and his ten fingers clenched on the handle of the mechanical shield axe that exposed a small section.

The head was slightly lowered, the hands were pulled out, and the mechanical shield axe was pulled out little by little, because it was affected by the 'shrinking' of the nursery bag, so it didn't scratch anything, and was smoothly pulled out by Lin Yu, and slashed forward without delay.

Clang!

A crisp metal clash rang out, and the blades of the shield axes were deeply embedded in the concrete floor.