For the next two days, Lu Su has been training with Professor Wei to hold his breath, because the consciousness of the "students" is high, and the "teacher" basically does not use it. The harvest of Jin Duan is that she has learned backstroke and dog chop in the past two days, but Jin Duan always has a natural understanding of the memory of the movements, and Willie taught her a few back and forth to learn, and she has been going back and forth in the swimming pool, stirring the water surface very uncalm.

When he came up to gasp, Lu Su asked Willy: "You stay in the laboratory every day, how can you swim?" ”

"When I was a child, my father put me in the swimming pool to learn it, and he said that humans evolved from sea apes, so they were born to swim. My swimming photos were used as evidence for his papers, and my dad was very nice to me. ”

Your dad threw you into the water to write your paper!

Lu Su's progress is not fast, but it is also steady, really like Professor Wei turned the limit into a habit, and then broke through it! When he held his breath, it progressed from three minutes to three and a half minutes, and every microsecond after that was extremely able to break through, and he felt that it was really the end! Every time, I choked on the water before I came up.

When Professor Wei came to accept the teaching results, Lu Su said: "If the time of choking is counted, I can stay in the water for ten minutes...... But you might have to give me artificial respiration. ”

"That's not going to work!" Professor Wei shook his head, "What's the point of choking on water!" Or I'll mix some potassium cyanide into the water, beware of you choking on purpose. ”

"Hey, it's going to die! Your daughter plays in the pool every day, you can't bear it! ”

"Let her stop playing, you're the only one who dies."

"You're still trying to kill me!"

Lu Su said that he had reached a bottleneck, so Professor Wei asked him to come up, took him to the laboratory, and then found a video of the world diving champion to show him.

Scuba diving...... It's like J's own dog, and no one knows the fun except for me! In the video, the athlete jumps into the water and remains there silent for a long time like a half-sunken corpse, with occasional montages of spectators on the shore, most of whom have boring expressions because they can't see anything but the surface of the water...... Even the host didn't know what to say, so he could only occasionally report the time and deliberately say: "Wells has been underwater for five minutes, five minutes!" ”

Lu Su noticed a special detail, the athlete had a rope on his body, and when he stayed underwater for nine minutes, his limbs spread out as if he was petrified, and when he pulled the rope, he would be dragged up by the staff on the shore.

The statement that the body automatically chooses the priority of oxygen supply seems to be true! When the breath-holding reaches the limit, the person is almost immobile...... Nine minutes is still a scary number, though, and these diving champions have their hearts and lungs so strong that they can probably blow up a hot water bottle.

"Inspired?" Professor Wei asked.

Lu Su nodded: "There is a point, the method of breathing and the posture under the water need to be adjusted...... Squatting under the water like I did, the blood supply to my body was not smooth, and the time was greatly reduced. ”

"Yes, what a good understanding! Try it again. ”

Running back to the pool, Lu Su told Jin Duan not to run around in the water, he wanted to lie down under the pool. Lying flat in the water according to that method, it seems that the oxygen consumption in the lungs has slowed down a little, and the feeling of cold hands and feet has become more obvious, and the demon constitution is changing little by little under this unconventional exercise.

This time the time actually broke through three and a half points, but when Lu Su wanted to stand up, he was in trouble, his hands and feet couldn't move at all, he choked on a mouthful of water, and the water in his lungs was like a cold knife, stinging for a while. Unable to move, he writhed desperately underwater, unable to scream or stand up.

At this time, Jin Duan plunged into the water and dragged him up! Jin Duan lifted him up, knocked him on the knee, and the water in the lobes of his lungs was squeezed out, and then Jin Duan laid him flat on the edge of the pool, and then his breathing came to an end. …,

"Ahem...... Ahem......"

"Do you want artificial respiration?"

"Come on...... Let's have a full set! ”

Witnessing the two doing "artificial respiration", Willie over there blushed and covered her eyes. After recovering, Lu Su said: "Although this is effective, I choke on water every time...... Can you do me a favor and get a rope to tie me down, and I'll pull you as soon as I pull it. ”

"What if I don't have paper?" Jin Xuan said.

"It's pulling me!"

"Pull you! What should I do if I don't have paper? ”

"Pull me up...... Not pull it out! ”

If you do it this way, it really works, and there will be no more danger of choking on water. However, Lu Su was worried that Jin Duan was bored, and when he surfaced, he asked: "If you are too bored, go play, I will still train in the original way." ”

"Which is better, the original method or this method?"

"Of course it is!"

"Then you go down and leave me alone."

For a whole afternoon, Jin Duan was actually doing this boring work, his eyes were fixed on Lu Su underwater, and as soon as he saw him pull the rope (the force of pulling in the limit state was very light), he immediately pulled Lu Su out of the water like a fishing line. Her lack of complaint moved Lu Su slightly, is it that the two of them have been together for a long time, and the short-tempered Jin Duan at the beginning is slowly changing, changing for herself.

When the glow of the setting sun spilled into the gymnasium, Lu Su reached three minutes and forty seconds...... It's not easy! When he was about to change his clothes, Jin Duan raised his hand and pushed him back into the water: "Don't put on clothes yet, swim with me for a while." ”

"Okay, I'll swim with you! Is Willie coming over too? ”

Willy, who was sitting there reading a thick foreign book, shook her head with a book covering her face, she seemed to be very shy about the intimacy between lovers, although she had a smart brain, but after all, she was a small pot friend.

"Ready, swim!"

As soon as Jin Duan shouted, the two of them kicked on the edge of the swimming pool, and rushed out with a "bang", Jin Duan's movements were very fast, and Lu Su, who could only point his fur, couldn't keep up at all, the gap was too big!

The rule is a back-and-forth, whoever comes first wins. Lu Su saw that he couldn't swim but simply didn't move, put one hand on the edge of the pool, and when Jin Duan swam back like a fish, he said, "You are so slow, I have already arrived." ”

"Hey......" Jin Duan was surprised, as if he believed it, "How could you be so fast!" ”

"This is slow, how can you, a beginner, compare with me, young people should not be too conceited, there is a sky outside the sky, and there are people outside the world."

"Ahh

"Big sister, he lied to you." Willie on the shore said.

"Mouthy!"

"Huh? You lied to me? Sensing that he had been deceived, Jin Duan raised an eyebrow, "Bastard, drink water." Then he pressed Lu Su into the water.

After sparing Lu Su, Jin Duan said: "If you don't study well, dare to lie to me." ”

"I was wrong!"

"Look at little Willie, she's faster than me...... Willie, come here. ”

"Here we go!"

"Why didn't I call her and didn't come?"

"That's affinity." Jin Duan laughed evilly.

Lu Su couldn't swim, so he had to be a referee on the shore, the speed of the two girls was indeed very fast, Willie's small body was as flexible as a fish in the water, chopping waves all the way, and it was even more than a head away from Jinduan.

After swimming for a while, both of them were exhausted, got dressed, put on their things, Lu Su and Jin Duan said goodbye and left, Willie asked, "Will you come back tomorrow?" ”

"Come!"

"Great." She clapped her palms and said happily.

……

Somewhere in T City, under a dry well, no one would have thought that there was a secret passage here, and even if it was discovered by outsiders, it would only be a plain stone wall at the end.

The old man held a torch and watched, while carefully taking out the Yin Yang Demon Bone Fan from his body, he stroked the dust and cobwebs on the stone wall with his hands, and there was a small square hole underneath. …,

No one would have thought that the Yin Yang Demon Bone Fan was also the key, the key to open the door of destruction. The old man pushed the fan into the square hole, and pushed it until it was completely submerged, only to hear a crisp "click" sound from the stone wall, and the whole stone wall cracked through the crack, and the crack became bigger and bigger, and finally separated left and right like a door.

He withdrew the Yin Yang Demon Bone Fan and stood there for a moment, waiting for the gloomy air in the cave to be diluted before walking in with a torch. This is an underground labyrinth, and the wise man knows the Qimen Dunjia, and it is not difficult for him to build such a secret mechanism.

There is actually no exit to this underground labyrinth, and even if thousands of troops rush in, they will be trapped in it, and even if they violently destroy the wall, they will not be able to find the exit, because the exit is in an unexpected place.

The old man shoved the fan into the imperceptible groove at each end of the road, and then the whole wall parted as before, and he traversed it all the way to the very center of the labyrinth, where there was a stone platform.

The stone platform weighed more than a thousand pounds, the old man wasted his strength to move away, there was a long groove below, he put the fan in, only to hear a "click" sound, in the darkness came the sound of gears turning, hinges dragging sounds, the surrounding walls began to move, rumbling sound came from all directions, spectacular.

Gradually, the moving walls in front of the old man automatically spliced together a long corridor, and the whole labyrinth began to slope to the side, so that a hole appeared at the end of the corridor.

The old man withdrew the fan and walked down the sloping passage into the secret hole. There is a stone chamber, where the core of the city-destroying mechanism is hidden.

He looked up at the huge instrument surrounded by three unicorns, and his heart turned upside down, and his thoughts drifted between the distant past and reality.

The old man muttered to himself, "Do you really want to start it?" ”