Thinking that the way fish breathe does not affect the speed of swimming, he tried to build a breathing channel in front of his head with aura to simulate the pattern of water flow when fish breathe, but found that because he had to constantly switch between "exhaling" and "inhaling", the constructed channel could not be stabilized, and he needed to constantly change the shape of the channel, which was too laborious and ineffective.

It is not surprising that his nose is not a gills after all, and he cannot achieve such a breathing function as smoothly as a gills.

He suddenly thought of a key problem: the gills of fish breathe from the mouth in front of the water and out of the gills on both sides, while he enters the water through the nose and exhales the same way, which is much less efficient than the breathing pattern of fish, which is a natural defect.

Beyond imagination, Tian Xu thought that he absorbed the oxygen and aura in the water, mainly relying on his nose, not his lungs. Pumping water into the lungs and exhaling it like this is quite inefficient. If the water is only sucked into the nasal cavity and not into the lungs, will it be more efficient?

He tried it, but it didn't seem to make much difference, and between exhaling and inhaling, the flow of water around his nose would always fluctuate, causing turbulence and creating a huge resistance.

He suddenly thought of the mouth, and the mouth and the nose are connected! You can suck water in from your nose and spit it out from your mouth, so that the flow of water will be one-way, and the turbulence caused by it will definitely be slowed down a lot.

I tried it, and sure enough, it worked. It's the water in the nose that comes out of the mouth, and I always feel a little uncomfortable in my heart, but I can't care about it for a while.

The nose absorbs water in the opposite direction to the direction it is going, which also creates resistance. However, this is not difficult for him, as long as he uses the aura to build a stable water inlet channel.

Finally, there is the question of the shape of the streamline. Build a fairing with aura in front of the body, and this problem is solved. It's just that this fairing has to cover the entire head and shoulders, and the scale is relatively large, plus the fins in the back, the water barrier on the body, and the construction of breathing channels, together consume a lot of aura.

Tian Xu sorted out his thoughts, stretched his hands to the front of his head, and then built a fairing, and then combined the breathing channel with the fairing, and then integrated it with the isolation layer on the body surface, so that the structure was greatly simplified, and the speed was suddenly increased a lot.

Tian Xu swam back and forth in the lake, like a **, and he had a lot of fun. He estimated that at this time, his cruising speed in the water could already exceed 15 meters per second, and if he held his breath and sprinted, it could be increased to nearly 30 meters per second, which was far beyond the speed of ordinary people on land.

Eventually, he thought about what would happen if he switched to propeller mode, and he was disappointed when he tried it, the propeller was too pitiful, and it wasn't as fast as the dolphin swing. Even if human beings invented the propeller, it was also for the convenience of transmission, and there was no advantage in speed and efficiency.

After playing in the water for a while, Tian Xu tried to use the aura to control the vibration of the water, or to create a high-speed water flow, but the effect was not obvious, he estimated that such an attack still had a certain power for the cultivators of the Qi Gathering Realm, and for the Ning Dan Realm, it was not satisfactory, and it was estimated that it would not have much effect.

Tian Xu couldn't help but be a little discouraged, the strenuous exercise just now, coupled with the several hours of condensing the pill process, made him feel a little tired, and the aura in his body also showed signs of insufficiency, and his body had automatically extracted the aura from the golden pill to replenish it. He went ashore, got something to eat, and then jumped into the water, sank to the bottom, and fell asleep.

He slept all day, and when he woke up, he was a little confused, and it took him a long time to figure out his condition. It was the first time he had slept in the water, and it was normal for him not to be comfortable with it.

After waking up, he checked his physical condition, and some of the lost aura in his body had been replenished, and Jin Dan stayed in his lower abdomen, exchanging aura with the aura in his body.

Now that his spirit had recovered, he picked up the unfinished task he had left yesterday and continued to study how to make a big move in the water.

After spending several days of repeated thinking and experimentation, he found that these methods were unreliable, so he had to stop first, lie down under the water and quietly think about the reasons for the failure.

A day later, he finally figured out that although he was in the water, he had been dealing with problems with the way he thought in the air. The density, resistance, weight, and viscosity of water are much greater than that of air, and it is of course ineffective to use the method in the air to make tricks in the water.

This brings us to the question of the properties of the water. It suddenly occurred to him that from the way he swam a few days ago to the attempts at tricks in the past few days, to put it bluntly, it was actually a question of how to transfer force in the water.

"It would be nice if my father was here. Tian Xu thought a little sadly: "Father doesn't pursue magic, he only focuses on studying one way, if the current question is handed over to my father, I believe he will be able to give the answer soon." ”

When he thought of his father, he suddenly remembered what his father had said: "All the actions in the world are the effects of force." As long as you understand the force, you will understand everything. ”

Since he was young, his father has a deep study of statics, fluid mechanics, aerodynamics, theoretical mechanics, etc., and also has a deep understanding of mechanics, electronics and other industries. Coupled with the fact that he has practiced Tai Chi for many years and his amazing talent, his research on force has reached a height that many scientists can hardly achieve.

It was these that supported him to go from a layman who had never heard of cultivation to a leader in the cultivation world with his own efforts.

"Since my father can enter the Tao from the perspective of force, can I too?" Tian Xu asked himself.

He immediately replied to himself: "Why not? I started with Zhuangzi, didn't I just want to refer to my mother's experience? My mother was also inspired by my father to enter the Tao, and it might be easier for me to start directly with force." ”

However, Tian Xu didn't expect that his father had a strong foundation in mechanics, and had the experience of practicing Tai Chi Tuishou for a long time, and had an incomparable intuitive feeling for force.

And Tian Xu has been practicing Tai Chi with his father since he was a child, and he has not yet touched the door when he is twenty years old. In his father's words, he was able to tie a cyan belt, and he didn't even have any hope of being at the green level. For the knowledge of mechanics in various secular worlds, he basically did not learn Chinese medicine.

However, Tian Xu did not think about these difficulties at this time. Aunt Xu, who studied business administration, and her mother, who studied Chinese, could get inspiration from their father and enter the pinnacle of the cultivation world.