After breakfast, Xu Ran was about to start his own exercise, his first choice was to go to the 'lava cave' to explore the situation first, of course, he also understood that he would not be able to pass through there at present, but he just wanted to check how far he could go in it now with his own strength. Pen ~ fun ~ pavilion www.biquge.info

The two women were really tired of being in this basin, and when they heard that Xu Ran was going to start exercising, they asked Xu Ran to 'want to go and see together', Xu Ran had no opinion on this, so Xu Ran was in front, controlling his 'spiritual power shield', and the two women followed behind towards the 'lava cave'.

On the road, the two women were walking through the green space, Xu Ran was floating directly above the trees in the green space, Xu Ran moved faster than they walked, he told the two of them to wait for them in front, and then began to practice in the air, how to make the 'spiritual power shield' move quickly.

In the past exercises, Xu Ran didn't care too much about this movement speed, just went with the flow, but now he had to think about this issue carefully, he had to take into account that after entering the 'lava cave', the air he could carry was very limited, and to pass through the 'lava cave' for a long distance with limited air, it was necessary to make the 'spiritual power shield' have a fairly high movement speed.

To put it simply, assuming that the length of the 'lava cave' is 600 meters, and Xu Ran opens a spherical 'spiritual power shield' with a diameter of two meters, and its spatial volume is 4.19 cubic meters, according to the calculation of 'one cubic meter of air can maintain a person's normal breathing for two minutes', the normal breathing time that can be maintained for him is: 2x4.19 = 8.38 minutes, which is more than 8 minutes and 22 seconds; After deducting the part of the space occupied by the volume of the human body, if Mao calculates, he only has 8 minutes of normal breathing time; Then he would have to pass a distance of 75 meters in almost a minute;

And if he wants to carry another person in the 'spiritual power shield', then he must reach the distance of 75 meters in half a minute; the reason why he wants to consider carrying another person is because in the face of the current situation of the two women, Xu Ran must consider helping them get out of trouble; for the two women's encounter, Xu Ran is very sympathetic, if he can't touch it, forget it, since he has met, as long as he can do it, Xu Ran will definitely help with this kind of thing; as for why he doesn't say that he brings two people at a time, it's because Xu Ran is now' The 'ultimate carrying capacity' of the spiritual power imperial object can't make him carry two people at the same time.

Here, this length of 600 meters is a data roughly guessed by the two women, because the two women really can't remember the length of the passage in this hole, they have only seen the relevant description from the relevant introduction, but no one thought that 'one day will need to use this specific relevant data', so they did not deliberately remember, but one thing they can be sure of is that the length of the passage will not exceed 1 kilometer, that is, if Xu Ran can let himself pass 1 kilometer in a limited time, then he will definitely be able to pass the level.

As for him setting the diameter of the 'spiritual power shield' to 2 meters at this time, instead of opening it to a diameter of 4 meters as just now, it was to take into account the high temperature environment in the lava cave; Xu Ran had checked the information before, the temperature of the magma was about 900 °C, and he estimated that his task would not be to travel through the magma, but even if it passed above the magma, he felt that the temperature there should be about 500 °C, with his 'spiritual power shield', the smaller the diameter, the better the heat insulation effect, He chose this 2-meter diameter because he needed to carry a certain amount of air, otherwise he would have set it smaller.

Xu Ran tested the maximum speed of the imperial envoy's 'Spiritual Power Shield', fortunately, although his two-meter-diameter 'Spiritual Power Shield' encountered considerable air resistance when moving, it basically reached the 'distance of 100 meters in 1 minute', so as long as he strengthened it, then it should not be a big problem to run a distance of 75 meters in half a minute; And if he can accelerate again, let him carry a person to beat the 1 kilometer, it should be no problem; This made Xu Ran very confident.

Near the mouth of the lava cave, after meeting the two women, Xu Ran began his first field test in the cave.

According to the two women, the entrance of the lava cave in the basin is upwind of the entire passage, and after entering from this passage, it leads to another exit in a slow downhill trend; If it weren't for the magma eruption in the cave and a vent that reached the top of the mountain, there would have been a lot of ash and heat gushing out of the cave on this side of the basin.

Even so, at the entrance of the cave, they could still feel the heat gushing out of the passage, so that the two girls did not dare to approach the entrance of the cave.

Xu Ran was wrapped in the 'Spiritual Power Shield', and with his fastest drifting speed, he floated along the passage to the cave, at first his 'Spiritual Power Shield' was still able to effectively insulate the heat, but when he moved to about 80 meters away from the entrance, he felt that the 'Spiritual Power Shield' could no longer resist the slow radiation of heat energy inward; He immediately retreated 5 meters, then stayed there and continued to use the 'Psychic Shield' to exert its thermal insulation effect, and when he felt the temperature in the 'Psychic Shield' rise again, he stepped back 5 meters again, and then continued to hover there, until he estimated that he had stayed in it for more than 7 minutes, and then he decisively returned to the entrance from the passage.

As for the choice of his return time, he left room for himself, saving time and exhausting himself out of breath, so he was embarrassed.

To say that Xu Ran can adjust the diameter of the 'Spiritual Power Shield' to 1.5 meters in diameter, the heat insulation ability generated by that will definitely be stronger, but the sphere under this diameter can only hold 0.56 cubic meters of space, which cannot meet his requirements for the use of oxygen.

According to the topography of the passage of about 80 meters, as well as the terrain that can be observed by Xu Ran's 'spiritual force field space' and extends more than 20 meters away, this passage is still very smooth for his 'spiritual power shield' with a diameter of two meters, and the smallest place along the way must have a 4x4 meter, and a large place can have a 6x7 meter; Along the way, Xu Ran also noticed that when he drifted in the passage, the air resistance he encountered was greater than that of the outside world, which should be caused by the pressure difference caused by the radiation of heat energy outward, and he felt that the fastest drift speed here was about 80 meters a minute.

For Elena and Amber, who were waiting outside the cave, although Xu Ran had only been in the cave for about 8 minutes, although they couldn't see how far Xu Ran had gone in the cave, although Xu Ran was sweating profusely after coming out; But the two of them were a little far away from the passage in the cave, and at least they saw Xu Ran floating towards the passage unhurriedly without any preparation; At least it proves that Xu Ran has the strength to enter the channel and give it a try; This at least made the two of them more confident in Xu Ran, and hoped more and more that Xu Ran could succeed as soon as possible and help them get out of trouble as soon as possible.

Although he didn't know the current heat resistance of his 'spiritual power shield' and how many degrees of heat resistance it could withstand, from the distance he entered the cave, he was still far from the place where the magma flowed out, that is to say, the heat resistance limit of his 'spiritual power shield' was still far from the target.

That morning, Xu Ran began his continuous practice in this lava cave; The two girls did not leave, for the bored two, it was also a pleasure to be able to wait not far from the entrance of the cave and enjoy Xu Ran's entry and exit one by one; What's more, they are not the kind of ordinary audience, they are equivalent to the guest level, every time Xu Ran comes out, the two of them will have some topics to communicate and interact with Xu Ran.

When it was time to eat at noon, the two of them were also waiting for Xu Ran to pick the fruit together, after all, there was no need to prepare in advance, they only needed to pick it directly to eat; At this meal at noon, after consulting Xu Ran's opinion, the two also picked some fruits that tasted bad, but were easy to fill their stomachs; After Xu Ran tasted it, he did feel that it didn't taste good, but Xu Ran also thought of a point, maybe it was because of the variety of food here that the two girls would not be malnourished.

When picking fruits at noon, the two women still volunteered to go picking, but they were stopped by Xu Ran, who directly showed them the ability of 'spiritual power to save things' - picking fruits in the air.

Before lunch, because of the sweat in the lava cave, Xu Ran told the two girls that he had to take a bath in the pond, which meant that he wanted the two girls to pay attention to avoid it; Elena said, "Then hurry up and wash it, just so we have washed the fruit first, and we will eat it with you." ”

Saying this, the two girls took the fruit to the pond to wash it, Xu Ran always felt that it was not convenient, so he was ready to go far away and then go into the water to take a bath, he just started here, and Alena called him with a smile: "Mr. Xu, where are you going?" ”

Xu Ran said: "You wash the fruit here, and I'll go to a farther place to soak it." ”

Amber also smiled and said, "Mr. Xu can take a bath here, usually we take a bath and wash fruits here, so it doesn't get in the way." ”

Xu Ran didn't know how to explain this, and looked a little at a loss, and Alena smiled and spoke again: "Mr. Xu won't be embarrassed to take a bath here, since everyone is in this environment, they must be getting along day and night for a while, Mr. Xu shouldn't be too restrained, let it be; What's more, Mr. Xu has already seen our fruit, so we should give us a chance to see Mr. Xu's fruit. ”

Amber next to her, at this time, just looked at Xu Ran with a smile and stopped talking, Elena saw that Xu Ran was still stuck and embarrassed, and she continued to persuade: "Go down and wash it, if you weren't worried that you would be embarrassed, Amber and I would also have to take a bath." ”

Speaking of which, it is inconvenient for Xu Ran to twist anymore, yes, he has seen the two of them in the morning, and they have not said that they are embarrassed, so why should they pretend again; So he replied to the two women: "Okay." Then, with his back to the two women, he quickly took off his foliage skirt and walked into the pool.

Through his 'spiritual force field space', Xu Ran could see that the two women were behind his back at this time, looking at his fruit, which made Xu Ran feel a little unnatural when he walked around; When the water surface was below his waist, Xu Ran thought that he should liven up the atmosphere, so he turned to look at the two women, ready to change the topic with them; Unexpectedly, Alena looked at him, and took the first step to seriously comment: "I didn't expect Mr. Xu's figure to be so good, his muscles are well-proportioned and powerful, which is much cooler than our bodybuilders here, it's too eye-catching." ”

Over there, Amber also praised it heartily and said: "It's really too eye-catching." ”

In the first part of this evaluation, Xu Ran sounded very useful, and was sincerely praised by others, and he really felt comfortable; But the last sentence 'too eye-catching' made him blush, not that he was useless to this sentence, nor that he was uncomfortable with this sentence, but that this sentence made him comfortable and deep so that he didn't know how to interface, so he made a big red face.

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