The warm water in the wetsuit was cooling down rapidly, and it didn't take long for it to get much cooler.

However, Li Yi had already adapted to the temperature and did not feel any discomfort.

Pushing the camera, he dived at a constant speed.

A good angle is to capture the swimming fish and the fishing boats on the water, so he needs to dive below the fish.

But the camera lens needs a certain distance to shoot the depth of field, so he has to dive to the best shooting distance.

So, as he dived, he looked back at the perspective while silently counting in his heart.

A minute later, he pulled back the safety rope.

Soon, the safety rope was pulled upward, which was Liu Yifei's response.

Feeling this response, Li Yi's heart was settled, and he turned around and continued to dive.

Finally, after nearly ten minutes of diving, Li Yi successfully dived about 50 meters underwater.

At this point, the depth of field is finally enough.

Li Yi stepped on his flippers and looked up.

The two fishermen also descended with him, and when they saw him stop, they also turned over, stepped on their flippers, and levitated behind him.

The water pressure at fifty meters underwater is already very large, and the pressure from all sides can be clearly felt.

But Li Yi felt fine, and although the two fishermen had been in the water all year round, they looked a little struggling.

For ordinary people, diving to thirty meters underwater is already the limit.

This is also within the area where recreational diving is usually conducted.

As the depth of the water increases, the pressure increases, and the density of the breathing gas in the human body increases.

79% of the natural air is nitrogen, and if you are scuba diving with compressed air, the number of oxygen and nitrogen molecules per unit volume will increase.

If the body absorbs too much nitrogen, it takes more time to expel it.

At this time, if the speed of the rise is too fast, the accumulated nitrogen will expand because it cannot be discharged in time, causing damage to the human body, which is the so-called decompression sickness.

So if you dive with compressed air, the maximum depth is 60 meters.

This is the limit of the national standard, and if it is exceeded, it will greatly increase the risk of decompression sickness.

Generally, people who have not undergone professional training will have symptoms of nitrogen intoxication when they reach about 40 meters, and their bodies will have symptoms of nitrogen intoxication due to too much nitrogen dissolution.

However, for this shooting, the film crew prepared a professional heliox mixture of gas in the cylinders.

The so-called helium and oxygen mixture is a mixture of oxygen that replaces nitrogen with helium.

Because helium is a smaller molecule and is better able to pass through human tissues, it can significantly reduce the risk of decompression sickness in divers.

It also reduces the density of the air, making it easier for divers to move underwater.

But even with the blessing of the gas mixture, after diving to a depth of 50 meters, you will feel a lot of pressure.

For every 10 meters of descent from the water, the pressure increases by 1 atmosphere.

At a depth of 50 meters, the pressure is already 5 atmospheres.

When ordinary people reach this depth, they already have a sense of difficulty when they breathe.

The deeper waters are all places for professional divers to compete.

After controlling his body to stay at this depth, Li Yi slowly lifted the camera up.

Before starting to shoot, he pinched the nasal congestion in his nose with his hand and blew it vigorously.

This is to combat the difference in air pressure in the ear canal and prevent pain in the eardrum.

In the human ear canal, the area of the middle ear is separated by the eardrum, creating a cavity.

As the depth of the dive increases, the air pressure increases, the air inside the middle ear is compressed, and the pressure of the external water pushes the eardrum inward, causing the ear to be squeezed and painful.

This is the same principle as having an earache when flying on a plane.

Blowing your nose can balance the pressure on your inner and outer ears, especially scuba diving, which is the most effective way.

This can also be used to treat earache on airplanes.

When he was diving all the way just now, Li Yi kept doing this action.

So until now, he hasn't felt any pain in his ears.

After making this last move, Li Yi set up the camera, aimed at the fish swimming in the light above, and began to shoot.

The schools of fish that gathered together were like monsters that were constantly changing shapes, following the trajectory of the lights, gathering and scattering.

On the outer edge of the light, a small boat hangs a trawl and surrounds the fish with a trawl around the edge of the fish.

The paddle engine made a big splash of water, and the fish panicked and dodged, but they were still greedy for the light and reluctant to leave.

With the roar of the fishing boat's engine, the winch rotates, and the trawl net is contracted, and the surging fish gradually gather together under the pressure of the trawl.

All of this was included in the lens by Li Yi.

He swam around schools of fish and trawls, filming the catch from all angles.

After shooting the long shot, he began to float up, approaching the net, and focused the camera on the fish rushing to the left and right in the net.

Under the camera's underwater light, the scales of each fish in the school reflect a dazzling light.

They are not the same creatures as the dead fish lying on the ice in the wet market, and they exude a fresh breath and vigorous vitality as they swim.

But unfortunately, they could not understand what the nets were, and they could not escape the temptation of the light, so they could only flee in vain, and finally they were wrapped in trawls and dragged towards the sea.

Seeing that the fish were fished up, Li Yi took another photo of the surrounding "stragglers" who were lucky enough to escape from the ascension.

But these guys still don't have a long memory after escaping the catastrophe, and they still gather under the lights, flying left and right, but they are still reluctant to leave the range of the lights.

Then, some of the nets fell from the fishing boat, and they were wrapped in them again, and they were all caught in one net.

At this point, there were few fish left in the surrounding sea, only a few slow-moving cuttlefish, jellyfish and plankton swaying with the waves.

Seeing this, Li Yi turned around and made a gesture to the two fisherman brothers, then stepped on his flippers and slowly floated upward.

As he floated, he swallowed his saliva.

In the process of floating, the air pressure in the middle ear will also change with the water pressure, and it is necessary to balance the air pressure in time, otherwise it will be painful.

After more than ten minutes of ascending, Li Yi finally surfaced, and a noise came clearly again.

Listening to the roar of the engine and Liu Yifei's shouts of joy, he had a feeling of near-death and return to reality.

Taking off the mouthpiece, he breathed in the fresh air and waved his hand at Liu Yifei.

A rope was thrown down on the boat, and Li Yi caught the rope and tied the camera tightly.

After watching the cameramen pull the camera up, they swam to the side of the boat, grabbed the steel escalator welded on the side of the boat, and climbed up.

As soon as he got on the boat, Zeng Shun stepped forward with Lin Hongqi and helped him take off his diving suit.

followed, Liu Yifei wrapped the thermal blanket around him, and helped him to walk to the cabin in distress.

"It's okay, you don't need to help."

Li Yi said with a smile.

But Liu Yifei still helped him, let him come to the cabin and sit down, helped him wrap the thermal blanket, and brought him a bowl of hot soup.

Several photographers had already brought the underwater camera over and removed the memory card.

Zeng Shun plugged the memory card into his laptop, looked at the footage, and exclaimed: "Great! This picture is absolutely amazing! ”

2

(End of chapter)