A-level items, generally to the A10 level is the top-level, and there are also A11 and A12 above the items, but most of them are just gimmicks of merchants to increase the price.

In terms of utility, it is still a higher grade of B. Du Bixing found a B1-level alien beast bone marrow essence on the Hunter Alliance Mall, asking for 990,000 yuan, which can greatly improve bone strength.

For this reason, Du Bixing not only spent his savings, but also borrowed some money from his roommate.

In the gravity practice room, Du Bixing brought the bone marrow essence of the alien beast and prepared to carry out the final cultivation of the iron bone here.

There was a tenfold gravitational field in the practice room, and Du Bixing warmed up for the advanced planetary space guidance technique as usual.

The period of discomfort of the early bones has passed, and now ten times the gravity is no longer a problem for Du Bixing.

After the warm-up, Du Bixing began to practice the Force. He took the bone marrow essence of the alien beast, because this thing contained too much energy, entering the esophagus was like swallowing hot magma, and Du Bixing felt that his mouth was about to breathe fire!

Using the exercises, he decomposes these energy expenditures into the most basic cosmic force, which is absorbed by himself. Some of these materials that are good for bones are also transported to the bones for absorption and strengthening by the force that urges the blood.

His bones began to undergo their final metamorphosis. Like those exoskeletons, bones grow from a thin membrane into a hard weapon!

And the most amazing thing is that it's not really a metal skeleton, similar to a modified person. Rather, it strengthens the strength and toughness of the cell, which can be turned into both a hard skeleton and a flexible cartilage.

With the strengthening of bones, the evolution of Du Bixing's body is also improving. Now it has reached more than 90% of the intermediate original martial artists!

"Master, the speed of evolution has slowed down, and the pressure needs to be raised, which is about to be eleven times the gravity!" the ball girl was constantly observing his physical condition.

Du Bixing acquiesced, and the gravity of the gravity field was increased to eleven times! In just ten minutes, the ball girl was increased to twelve times!

Every once in a while, the ball girl doubles the gravity. Du Bixing no longer had the energy to think about how many times the gravity was, so he could only concentrate on practicing the exercises, allowing the Force to penetrate every cell and provide them with evolutionary energy.

I don't know how long it took, Du Bixing only felt a sudden relaxation in his body, as if a small mountain on his back had suddenly been removed. The bones also closed completely and stopped growing.

The ball girl's voice sounded in his ears: "Congratulations master, you have completed the cultivation of iron bones, and you have successfully advanced to the advanced original martial artist!"

"It's a success!" Du Bixing stood up, only to feel that his whole body was extremely happy. After nearly two months, the "weakness" and "itchiness" of the bones finally disappeared.

"Why is it so easy? Is gravity off?" asked Du Bixing.

As soon as he finished asking, he saw that the virtual panel in the room showed that the current gravity had increased by fifteen times!

"What? It's fifteen times more, why don't I feel tired at all?" Du Bixing said in surprise.

The ball girl said: "Because master, you are already a high-level original martial artist! And you also have iron bones, this pressure can be fully withstanded!"

Du Bixing was still surprised in his heart, his mentor Yan Jingrong had said before that a high-level original martial artist would directly enter the tenfold gravity cultivation. After two months of training, he should be able to support fifteen times the gravity, but it will never be as easy as him.

In other words, the current Du Bixing can withstand a higher degree of gravity and will not feel strewn!

And this is just the endurance, after reaching the high-level original martial artist, Du Bixing's physical fitness and force level have improved.

......

Soon, it was the day of the first freshman assessment of the True Martial Arts Academy. All students in the academy begin with gravitational field acclimatization. Therefore, this assessment is also related to the gravitational field.

In the class, the students have already arrived, and Yan Jingrong informed them yesterday that they will be assessed today.

Du Bixing hasn't seen these "classmates" much for two months, by the way, and mentors.

While Yan Jingrong hadn't come yet, the students were chatting enthusiastically.

"I'm going to take the test today, I'm so nervous! I can only adapt to gravity six times now!"

"Don't worry. You are an intermediate primordial martial artist, six times should pass. ”

"Tian Hui, how many times can you be?" someone asked.

Tian Hui said slightly proudly: "Ten times!"

"Ten times!" the classmates were surprised, "You are an intermediate original martial artist, you are already ten times over!" This assessment is nine times ten, no wonder the tutor focuses on cultivating you!"

Tian Hui pretended to be modest and said: "Generally, Lei Ye is the strongest in our class. He is now a high-level original martial artist, and he can already practice in the fifteen times gravity field for a whole day!"

"Fifteen times!" The students took a deep breath and looked at Lei Ye one after another, "This multiple is normal cultivation, and his physical fitness is too strong!"

Lei Ye was relatively calm and said, "Generally, it's not the limit yet." I only hope to get a place this time and strive to join the Taizhou Club!"

"Taizhou Society, big guy, can you join the Taizhou Society?" several students hurriedly asked.

"Not sure. However, I have heard that among the freshmen, those who perform well can be invited by the Taizhou Association. ”

"It's amazing, we just want to pass, the geniuses are already thinking about how to enter the Taizhou Club!" the students sighed. They have begun to realize that even in Taizhou University, where there are many geniuses, the gap between people is still so big!

"Then take the liberty of asking, how many members of the academy do you need to join the Taizhou Society?" Du Bixing interjected and asked.

He was very interested in the Taizhou Society, what kind of organization is it that brings together the geniuses of this school for generations?

Hearing Du Bixing speak, the other classmates actually fell silent at the same time, and they all looked at him with strange eyes.

After a second, Tian Hui laughed out loud and said, "You ask this? Do you also want to join the Taizhou Society? Don't be funny!"

The others laughed too, "You still care about how many times gravity can pass!"

"I think I should worry about how not to be expelled from school! If I have a negative score of less than 10, I will be persuaded to quit!"

For two months, they barely saw Du Bixing when they were practicing in the gravity room. So everyone agreed that this classmate should be too talented and unable to endure hardship, so he gave up on himself.

Unknowingly, they have excluded Du Bixing from the collective.

Even the mentor Yan Jingrong had given up on Du Bixing after several spot checks did not find him practicing in the gravity room. He even felt that if Du Bixing's results were assessed this time, it would be necessary to ask the school to dissuade the student, so as not to affect his tutor's evaluation.

Du Bixing said calmly: "What are you excited about, I'm asking Lei Ye." ”

He looked at Lei Ye, Lei Ye didn't laugh at him, he was too lazy to laugh, in fact, in Lei Ye's heart, these people around him were also dispensable foils.

"Probably in the top ten. Lei Ye still replied.

"Thank you. Du Bixing nodded.

"Are you going to take the tenth in the academy?" Tian Hui deliberately laughed, "Come on, I'm optimistic about you, the positive number is not good, and there is a countdown!"

Everyone laughed, and Du Bixing saw Tian Hui's expression, as if he saw Zhang Zhigao in high school. He snorted coldly, "Sensationalism." ”