As soon as the five sons entered the sea, they immediately switched their breathing to internal breathing, and then swam towards the deep sea like five dragons.

In winter, the water is already cold, and the deep sea does not see light all year round, so it is naturally even colder. The place where the Yellow River flows into the sea, in the Bohai Sea, is a muddy coast, and the mud content in the sea water is extremely high, which makes the water not only cold but also quite poor. And as you swim deeper, the pressure of the water will increase, and at a certain depth, the interaction between darkness and cold and water pressure will not be unbearable even for those fishermen who live by the sea all year round.

The five sons are not ordinary people, and they can still reach places that ordinary fishermen can't reach. It's just that the true qi was sealed by Wang Yuelong, and although he could still breathe inside, he couldn't stay in this dark and cold sea for too long. The darkness in the seawater, as well as the large amount of sediment carried by the Yellow River, still have a great impact on their vision, and at the bottom of the Bohai Sea, which is only a few zhang deep near the mouth of the Yellow River, they can only see the distance of a few zhang around them, and no matter how far away they are, even with the super vision of a god-level master, they can't see it.

What's more, now they can't mobilize the true qi in their bodies, so they naturally can't cover the true qi outside their whole body. Although the clothes they wore were specially produced by the Five Merchants Alliance, they could resist the cold and heat, and they could also regulate the pressure inside and outside the body, but the degree of adjustment was still limited, and the water pressure in the deep sea was enough to break the adjustment ability of those clothes. Unable to use true qi to isolate the surrounding sea water and sediment, nor can it borrow true qi to isolate the cold and water pressure in the sea water, the movement time of the five sons in the sea water is greatly limited.

Of course, the Bohai Sea in the area where the Yellow River flows into the sea is only a few feet deep, and the cold and water pressure in the sea will not have any impact on the five sons, and the only thing that can cause a certain impact may be the large amount of sediment and the ice floe in the offshore area.

Without the True Qi Body, the mud and sand couldn't stop pouring into the ears and noses of the five sons, and the eyes were also foggy, not to mention diving for a long time to catch fish, and even the time they could stay underwater was greatly shortened. Although there are many fish, shrimp and crabs in the coastal area, they are limited to the season, and the large ones are not easy to find. To solve this problem, they have to go deeper.

It is already difficult to judge the direction and distance in the ocean, and even more so under the surface of the sea, even the concept of time can be disrupted. The five sons didn't know how far they had swam, and they didn't know what time they were now, but when they came to the surface to breathe, they looked back and found that the muddy and sandy coast was long gone, and the sea was just a large ice floe, and the howling sea breeze blew on their faces like knives, and the sky was clear from before, and became thick with clouds, and it seemed that the sky was about to change.

The weather on the sea was already erratic, and the sea surface in this winter was even more difficult to fathom, but the five sons glanced at each other, and after breathing a deep sigh of relief, they dived into the water again.

They didn't know that in the dark clouds above their heads, Wang Yuelong was hiding inside, watching them from top to bottom, and when the five sons all dived into the water again, they fell from mid-air, and then stepped on a withered reed pole, so floating on the sea surface did not sink, quite a few legends of the Bodhidharma patriarch crossed the river with a reed.