The invisible sound barrier in the air is like a very elastic film blocking Zhang Tie.

This film is not terrible. Zhang Tie feels that he has the ability to easily pass through it and break it, but I don't know why, Zhang Tie tried many times, but he couldn't break through this sound barrier.

The chakras of "The Sutra of Infinite Peng Kings" are still running steadily, providing Zhang Tie with endless power. Zhang Tie feels that this speed is still not his limit. In terms of speed, the "Sutra of Infinite Pengs" gives His abilities have not been used yet, but what makes Zhang Tie so depressed that he wants to vomit blood is that he obviously feels that he can easily break through this sound barrier, but in fact, no matter how he tries and struggles, his speed, They are always hovering at around 1200 kilometers per hour. This speed may be scary for ordinary knights, but for Zhang Tie, it is not satisfactory.

It feels like you are driving a Celeron T9, but you can only run slowly on the highway at a speed of 40 yards. The engine of the Xianlong T9 and the performance of this car in all aspects can fully support you to run to more than 200 yards. You are also a racer, but always, no matter how you step on the accelerator, you can only reach 40 yards. Toss in speed.

Where is the problem?

If this happens to a sports car, it is probably that you did not put the car's gearbox into a higher gear.

For Zhang Tie, who practiced "The Sutra of the Infinite Peng King", such a situation occurred. He clearly had the powerful flying ability endowed by "The Sutra of the Infinite Peng King" but could not burst out. He obviously felt that he could easily break through the sound barrier but ended up in the sound barrier. The front is stagnant, then, there is only one problem-in the complete "Sutra of the Infinite Peng King", there is definitely a corresponding flight secret method that can be used to release the powerful flight ability and talent of the "Sutra of the Infinite Peng King". The "Wu Jian Peng Wang Jing" that I have mastered is incomplete, and there is no corresponding flying secret method, so I feel this kind of powerlessness.

Above the stratosphere, Zhang Tie remembers that it should be the middle layer in the atmosphere.

While trying to break through the sound barrier, Zhang Tie also felt two obvious characteristics of the middle layer. The first characteristic of the middle layer is cold. The higher the middle layer, the colder it gets. In the middle of the middle layer, The temperature can probably reach below minus 50 degrees. The so-called piercing wind should be like this. The second feature of the middle layer is the very obvious air convection movement.

The temperature below the middle layer is high and the temperature above it is low. This situation is very similar to the situation in the troposphere. Therefore, the middle layer also has the convective motion of the airflow in the troposphere and is more intense.

Zhang Tie doesn’t care much about the cold temperature. Both his body protection and his own cold resistance are superb, and the super airflow in the middle layer is exactly like the seabed to Zhang Tie. Like the undercurrent in it, it can be used as a booster for his flight, allowing him to reach a higher speed with less strength.

In the past, he felt the movement of airflow relying on the keen instinct cultivated by the body, but now, with the eye of lotus, because the airflow movement in the middle layer itself is produced by the temperature difference, Zhang Tie can even see the middle layer. The direction of movement of each stream in the airflow.

In the eyes of Lianhua, the invisible air currents in the middle layer produce cyclone columns like super-large color-changing mushrooms planted in the middle layer. These color-changing mushrooms are tens of kilometers in size, and large ones. Thousand kilometers, very spectacular.

Zhang Tie tried many times, relying on the effect of the airflow, it can indeed make him more labor-saving when flying, and sometimes more agile, but no matter how strong the airflow, no matter how well he uses it, he still cannot break through that. Layer sound barrier.

When rising to a height of 400 kilometers above the top of the middle layer, Zhang Tie saw the outline of a faint arc of the ground under his feet on the distant horizon for the first time. While seeing this outline, Zhang Tie Tie also felt a kind of pressure. This kind of pressure is very similar to the sound barrier, that is, you clearly feel that you have the ability to fly higher, but there seems to be a transparent ceiling above your head, preventing you from continuing to fly.

Zhang Tie knew that if he couldn't master the flight secrets of "The Sutra of Infinite Peng King", the speed of about 1,200 kilometers per hour and the top area of ​​the middle layer of the atmosphere above 400 kilometers from the ground should be what he can now reach. The ultimate speed and altitude of flight.

Zhang Tie has been flying on the middle level for eight hours and has already flown out of the range of Zhongzhou and Longxi County.

After flying for more than 9,000 kilometers, Zhang Tie didn’t feel tired, he felt a little depressed. The thunder falcon he felt was flying towards him like lightning, at a speed of more than two Mach, almost 3,000 kilometers per hour, and the same was not there. Tired, I am a magnificent earth knight, and I practiced "The Infinite Peng King Scripture". Is it not as good as a bird in terms of flying ability?

But depressed and depressed, Zhang Tie also knows that this kind of thing can't be anxious, unless he can obtain the complete "Wu Jian Peng Wang Jing", otherwise, if you want to improve your flying ability, you can only think slowly. However, if the full version of "The Sutra of the Infinite Peng King" is really there, once such a great emperor-level cheat appears, I don’t know how much stormy waves will be caused between the human and demons. I am afraid that the characters above the rank will have to move. He is a land knight. In such a fight, it is estimated that he does not even have the qualifications to play.

During these hours of flight, Zhang Tie also encountered three waves of knights and two flying boats in the sky.

Those two flying boats were flying in the stratosphere, and Zhang Tie was not found at all. The two sides crossed each other. The remaining two waves of knights, one of three people, two earth knights and a dark iron knight, were also in the stratosphere. During the flight, this wave of people found Zhang Tie flying above them, but there was no communication. The two sides left separately. The knights in the second wave were two ground knights. When they saw Zhang Tie, the two ground knights The knight didn’t know why, and seemed very curious about Zhang Tie’s ability to fly in the middle layer. They chased Zhang Tiefei in the stratosphere for a while, as if they wanted to see what Zhang Tie looked like, but Zhang Tie was not interested in communicating with them, so he flew directly. gone.

The speed of these two waves of knights in the sky did not exceed 900 kilometers per hour.

What really shocked Zhang Tie was the third wave of knights he encountered. The third wave of knights was actually only one person. It was a phantom knight, a magical entity of a nine-headed monster flying in the middle layer. Phantom Knight...

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