Bright Sword starts with the grenade flat.

Chapter 496 Being Underestimated
While Liu Xiu was talking, Qin Huairu had already divided the roasted crab into four parts and brought it over, then said to Kane:

"You guys should eat and talk at the same time! You have to eat well even if you want to fight the big devil!"

Of course Liu Xiu had no objection to Qin Huairu's words, and he immediately lowered his head to enjoy the food.

Of course I have to say that it tastes really fresh and tender.

While Liu Xiu was eating, Millie also enjoyed it without hesitation, and said to Kane while eating:

"Kane, after the competition is over tomorrow, let's buy more of these crabs and bring them back to the spaceship! This way we can have the best seafood dinners every day!"

But in response to Millie's words, Kane frowned and said:

"That shouldn't work! After all, I heard that no matter what kind of seafood is frozen, its taste will go bad!"

Millie said nonchalantly:
"What's the big deal? Why not just build an aquarium on the spaceship?"

However, Kane shook his head and said:

"Forget it! Kainaer will never agree to this request!"

Millie could only sigh helplessly at Kane's words. There was nothing she could do since Kane's spaceship was a spaceship with its own personality and temper!
After all, if Kainar is really pissed off, it is possible that she and Millie will be thrown on some random planet to live a primitive life.

Of course, the biggest possibility is that Millie was thrown there. After all, Kainar still needs Kane very much!
What Liu Xiu didn't expect was that after eating the barbecued seafood made by Qin Huairu, Kane said to Liu Xiu:

"I think it's better to forget it! Although you have obtained the lost spaceship left by the prehistoric civilization, the real power of the lost spaceship still depends on the will and spirit of the pilot. I don't want to be held back by you!"

When Liu Xiu heard Kane's contemptuous words, he did not immediately become angry and challenge a duel. After all, Liu Xiu's age in his past and present lives combined was almost three hundred years old.

So some things seem very bland, very bland.

After all, in the past nearly three hundred years, Liu Xiu had enjoyed all he should have enjoyed and experienced all he should have experienced.

Therefore, he naturally did not have the impatience of young people. Of course, it was also because he had experienced so much that Liu Xiu sometimes began to understand the benefits of Meng Po soup.

So Liu Xiu just smiled slightly at Kane's contempt and said:

"In that case, I won't force you. But if you really encounter the Dark Star or its minions and find that you can't defeat them, you can use this communicator to call for help. Then I'll let you see my strength."

As he spoke, Liu Xiu took out a quantum entanglement communicator and threw it to Kane.

After all, Kane had just eaten someone else's barbecued crabs, so this time when the communicator was thrown to him, Kane accepted it without rejection.

After eating the barbecued crabs, what Liu Xiu didn't expect was that before leaving, Mili said to Qin Huairu:
"Thanks for the crab, but I will definitely beat you in the final tomorrow!"

Qin Huairu smiled and said:
"If you want to beat me, you've got to work hard!"

After finishing her meal, Qin Huairu looked at the clear blue water and suddenly said:

"Brother Xiu, why don't we go diving? It would be a shame not to go swimming in such clear water!"

Liu Xiu did not object to this. Instead, he took out two artificial fish gills and said to Qin Huairu:
"That's perfect. Let's try it out and see if it's as good as they say!" That's right, in order to allow tourists to better experience the charm of the ocean, the planet Sansanya invested in the research of a respirator that no longer requires compressed air to breathe underwater.

I call this respirator artificial fish gills. The reason why it is called artificial fish gills is because the principle of this thing absorbing air is actually the same as that of fish gills.

That is to absorb free oxygen molecules in the water and then use them to provide oxygen to the user.

After all, any creature on the blue planet needs oxygen, and fish are no exception. The reason why fish can survive in water is that they can breathe in water through gills. Fish gills can separate oxygen from water in the water, so that fish can get oxygen in the water.

Oxygen dissolves in water, which is why humans cannot survive in water. Humans breathe through their lungs, and the alveoli can only absorb oxygen from the air, but not from the water, so naturally there is no way to breathe in water.

As for aquatic animals such as dolphins and whales, they rely on holding their breath to move in the water. That is why their nostrils grow on their foreheads to facilitate breathing.

Of course, humans can also hold their breath and move around in the water, but it is ultimately not as convenient as the gills of fish. Therefore, in order to increase survival time in the water, humans invented oxygen cylinders for diving.

By breathing oxygen in oxygen cylinders through oxygen masks, you can survive underwater for several hours. Once the oxygen cylinders are used up, you will face the risk of suffocation in the water.

Although modern large-volume oxygen cylinders contain abundant compressed air, their bulky size still affects human underwater activities.

So, someone invented a tool that can draw oxygen directly from the water like fish gills.

Of course, this artificial fish gill technology is actually not difficult. In the world before Liu Xiu traveled through time, although it had not yet entered the interstellar age, it had also successfully created artificial fish gills.

After all, to put it simply, artificial fish gills actually filter oxygen molecules out of the water through ultra-fine filtration, so that everyone can breathe freely in the water.

On the Blue Planet where Liu Xiu lived before he traveled through time, a company had launched an artificial fish gill based on this method.

Its principle is to use a very small but powerful air compressor to compress oxygen. The only drawback is that the speed of filtering oxygen cannot keep up with the amount of oxygen required for human breathing.

Therefore, users of this artificial fish gill can only do some simple movements underwater and cannot perform large-scale exercises to avoid oxygen consumption exceeding oxygen production.

Moreover, because the battery technology in the world before Liu Xiu traveled through time was not advanced, the underwater life of this artificial fish gill is only forty-five minutes.

So even though this thing has been on the market for several years, everyone who has used it has returned to traditional oxygen cylinders for diving activities.

Fortunately, the technology in the interstellar age is still much better than the era before Liu Xiu traveled through time.

For example, the battery life can reach four or five hours without any problems.

In addition, its ability to absorb oxygen in water is also very strong, which can fully meet the oxygen consumption of humans in high-intensity exercise underwater.

Of course, what is more critical is that the oxygen adsorption rate of this thing is manufactured based on human needs.

In other words, the faster a diver breathes in oxygen, the more oxygen he can produce.

Liu Xiu swam in the water for a few strokes and then called Qin Huairu to go into the sea with him.

(End of this chapter)