Graves stood on the edge of the boat with his hands behind his back, and a colorful color passed over his sunglasses. The corners of his lips curled up, and his smile was a little gloomy, "No. 13, you're out of time."

In other words, she has to do it again thirty times...

No. 52 remembered Huo Xue's discomfort when she was swimming in an armed manner before, and looked at Graves with disagreement on his face, "Sir, aren't it too many times thirty times..."

They carry anti-shark agents with them, the main ingredient is dead shark extract. Sharks have a good sense of smell when they spread and penetrate into the sea, and they will basically avoid them when they smell it. Moreover, it is super myopic, and even if you stand in front of it, it can't see you.

But fatigue, continuous bare hands diving is undoubtedly a very dangerous behavior. No one can predict what is going on underwater. A little blood cut by a fish or seaweed or a sea rock may attract sharks. Once the diver bleeds, neither shark anti-shark agent nor orange life jacket will work. The shark's sense of smell is extremely sensitive, and they can find you through a few nautical miles.

Moreover, the physical energy consumed by deep diving is huge, and the body can dive to an unpredictable position, but if you want to go upstream after all your energy is consumed and you reach the limit position, it will be really hard to return.

The sea water continued to seep down Huo Xue's pale nose. She stood up on the railing and walked aside to prepare, "Yes, sir!"

Next, everyone got into the water.

Such extreme challenges undoubtedly require a body of tendon and persistent professional training. It is difficult for normal people to survive the process of brain hypoxia consciousness fragmentation presented by physical and mental exhaustion when returning home. Those who can hold their breath on land for three minutes are not considered ordinary people, let alone in water. Once the physiological limit is exceeded, if no one can provide rescue, they will have to drown in the water. Many swimming pools in China will post warnings that they are prohibited from snorkelling.

Therefore, except for No. 52, No. 72, No. 102 and some members with good water quality, everyone else was asked to do it again thirty times.

Punishment time.

Huo Xue held her breath and fluttered into the sea again.

Although there have been no accidents so far, thirty times, that is, the upstream dive of about five or six thousand meters, is enough to give all the team members a blow.

If it was twenty-three days, that is, the Hell Week, everyone was asked to pass such a test. She could guarantee that if there was no help button, no one here could surface alive.

Even if they have greatly improved their physical fitness, it is very difficult to face such huge challenges.

After repeated wanderings, she had confirmed that the distance from the sea water to the seabed was actually not a hundred meters.

The total distance should be about eighty meters.

Because last year the explorer Zeon Nery just set a Guinness World Record for unequipped diving in the 87-meter world.

So without providing oxygen tanks, how could they easily surpass such years of professional diving training?

But it has to be said that the eyes of this instructor Graves have always been in line with the world.

Graves will never ignore the general data.

But with just one month of hard work, how can we achieve the results of others for decades? To reach the level of Zeon Nery, the lung capacity, breathing frequency and the heart's ability to resist stress and contraction all require persistent professional practice.

For example, when you dive below forty meters, the lungs will shrink and produce low pressure, adjust the blood flow from the blood vessels in the lungs to the blood sac to form a protective net. Otherwise, if the lungs are pressed by water and the qi and blood flow backwards, people will die directly.

Therefore, once a person dives more than four hundred meters, his body will begin to be compressed, and when he reaches two thousand meters or even deeper, his bones will not be left behind.

Too much pursuit of limits, resulting in too far distance between the dive and the water surface is also one of the factors that make people give up. Many people die on the way back.

Huo Xue has been returning for the sixth time. She stroked her arms upwards and was more than 20 meters away from the water. A gray shark suddenly appeared in her vision!

He was about to arrive at the shore and was nervous and wanted to breathe. Huo Xue saw this huge creature that often appeared in her nightmare, and her pupils suddenly shrank.

The shark's back is dark gray, one meter long, and blisters occasionally float out of the gill slits on both sides of it, and its teeth are sharp and closely distributed.

The shark swung his fins quickly and quickly approached her!

Huo Xue was panicked, as if she had seen the scene seventeen years ago again. Her heart beat faster and the departure of oxygen continued to erode her only consciousness. Her arm was helpless. As the oxygen in her chest and lungs continued to consume, white bubbles kept gushing out.

Due to the exhaustion of oxygen, the brain also appeared in fragments at this moment. Her eyes involuntarily closed and allowed her body to hang into the abyss again.

The boy's skin looked transparent and white under the sunlight, his brows frowned, as if he was trapped in an endless sea of ​​suffering. He immediately fell down in an unconscious state.

There was a blur around.

Opening his eyes again, a white light pierced into his eyes, Graves's serious old face still stood in front of him, and he narrowed his eyes.

"No. 13."

"So far, it's your second time. Now there are two choices in front of you. Either ring the mouth of Wu Zhong and exit directly, or continue to complete the remaining twenty-four times."

This book was first published by Xiaoxiang Academy, please do not reprint it!
Chapter completed!