(PS: Thank you for the 100 coin reward for the charm)

In the beautiful and wonderful atmosphere of the glass passage -

Katu was also surprised to hear such a strange word, this guy Townsend really knows so much?!

After Liuyin's fleeting surprise, he smiled and deliberately asked Tang Sen, "What is the Klein Bottle?" Is it a bottle? ”

Townsend smiled evilly at Liuyin, pointed to the glass ceiling, and said, "In the field of mathematics, the Klein-bottle refers to a plane that has no direction, such as a two-dimensional plane, and there is no distinction between interior and exterior. ”

"But we're in a three-dimensional space." Liuyin seemed to fully understand what Tang Sen meant, and also raised questions.

"The Klein bottle is not the cup we usually use to drink water, this object has no edges, and its surface does not end. Although it is two-dimensional, some of its points occupy the same position in three-dimensional space! Townsend used his fingers to follow the glass floor, circled a few times, and drew a very complex curve in the air......

Liuyin's eyes showed a sense of appreciation and admiration, and she said with satisfaction: "It seems that it is suitable for you to meet Mai Qi." ”

"Of course!" Townsend held his head up triumphantly, feeling that he was simply a genius.

"The way you calculated the shadow area just now can be used in the space of the sphere, it seems that your head is not the mind of an ordinary person. It's just that the last few push-ups you do, is there any special computational use? Liuyin asked at Tang Sen.

Although Townsen's calculation method looks strange and nervous, there are special scientific principles and conversion formulas in them, except for the push-up, does he also use it to calculate the angle of elevation?

Town's actions strongly aroused Liuyin's interest......

"Huh? Push-up!? I'm just showing off, don't you think a male animal should have such a strong physique? Townsend took a deep breath and tensed the muscles throughout his body.

The hospital gown with many holes, and Tang Sen's expression and posture, made Liuyin laugh......

"Huh!? What are you laughing at? "Townsend has completely regarded Liuyin as a good friend......

"It's nothing, I just think you're cute." Liuyin's smile is a toothless expression most of the time, subtle but heroic.

"I'll go! A mature man, most afraid of others saying that he is cute, especially being said to be cute by a beautiful woman......" Tang Sen pouted, expressing his dissatisfaction with the adjectives used by Liuyin.

"Now that you know it's the effect of the Klein Bottle, can you see how to go this way?" Liu Yin deliberately made a bad problem, you know, in such a complex psychiatric prison, it is simply difficult to find the right way out.

"Piece of cake!" Tang Sen jumped to the front, excitedly leading the way......

Katu and Liuyin glanced at each other, and a snickerer crossed the corners of Liuyin's mouth, and the two followed behind Tang Sen......

"Speaking of big beauty, if you are really Mai Qi's assistant, then you know everything about Mai Qi very well?" Tang Sen didn't know where the confidence came out, not only led the way with confidence, but also turned his head and talked to Liuyin about this relatively sensitive topic.

But when Tang Sen asked this question, Liu Yin did not answer patiently and with a smile as before, but after a few seconds, she let out a casual and cold "um".

Tang Sen is not really stupid, he can hear the feeling of unhappiness from Liuyin's tone, so he stopped the topic in time, originally he also wanted to set a set of Liuyin's words, but he didn't expect this beautiful mixed-race beauty to be quite alert!

After a short walk, Townsend stopped at an intersection where there were many passages, and since each passage was winding and could not be seen at all, it seemed impossible to judge which way to take by his vision.

Townsend paused there......

"It's a real problem." Liu Yin deliberately narrated it, her tone was always so soft, her slender long legs and domineering aura did not look like an Oriental at all, but her temperament always made people feel like a small jasper, and it seemed familiar......

After Tang Sen made all kinds of strange calculations, he really couldn't figure out where to go!

He scratched his head in frustration, even messing up his most cherished hairstyle......

"Come with me." Liuyin said softly, still with her hands diagonally in the pockets of her black trench coat, and walked proudly in front, she did not choose any passage in front of her, but stood next to an inconspicuous glass wall.

She stomped her foot slightly, and the glass wall was like a stone thrown into the water, rippling, and as the ripples spread, a door opened in the center of the ripples in a short time!

Liuyin pouted at Tang Sen, smiled meaningfully, and stepped into the door.

At this time, Liuyin's back had disappeared into the corrugated door, and Tang Sen was still reminiscing about the smile of this mixed-race beauty......

"Gone!" Catou reminded Townese, walked ahead first, and disappeared from Townese's field of vision.

"Huh! Wait for me! "Townsend also felt strange, obviously he is a top student, he has always been the first, why since he met Lloyd, he feels that he has always become the penultimate in everything?!

When Townsend also stepped into the corrugated door, the corrugated door closed, and it was pitch black before his eyes......

"I'll go, what's going on!?" Townsend exclaimed, because at this time he couldn't feel the ground under his feet, because the soles of his feet were a little soft, and if he stepped on it hard, it would sink in, but not in the sand, because the sand would quickly cover the surface of his feet.

In this dark space where you can't see your fingers, it is very empty and supernatural, and as soon as Tang Sen makes a sound, it is as if he has been swallowed by the black hole lurking inside, and in the end it can only be silent......

Tang Sen couldn't help but be nervous, could it be that he said something wrong and fell into Liuyin's trap? But this shouldn't be, if Mai Qi is an assistant, she should be her own talent, unless she ......

"Card ...... Fig? Worried that the sound would be "eaten" again in this dark space, Tang Sen deliberately lengthened his voice and shouted slowly......

However, there was still a dead silence around him, and he couldn't see anything, and Tang Sen didn't dare to take a step forward casually, because he didn't know if there would be a trap or something more terrifying under his feet, and it was difficult to move now.

At this time, Tang Sen felt that the soft thing on the soles of his feet actually began to rise, and he subconsciously took a step back, but he still stepped on the soft "ground" that was rising.

"Kathu's guy must have been hiding from this thing, and then he fell into the trap! If you look at me, I won't hide! Tang Sen was quite satisfied with his IQ, and then he stood firm, wrapped his arms around, and felt that his psychological quality was really good!

At this time, he felt that on both shoulders, there seemed to be something sticky and a little soft sticking to it.

"Oops, I'll go! What the hell is this!? ......" Before Tang Sen could finish speaking, he was dragged away by this unknown goo...... (To be continued.) )