Jiang Cheng did not come back that night. During this period, he was either in Jishitang or in the library. Instead, he had only a few days to go back to the Mathematics Academy. This made Bai Zhirou, Yue Shan and his brothers very dissatisfied. In the end, Yue Shan couldn't help but run to the library and told Jiang Cheng that Bai Zhirou's return, and he dragged Jiang Cheng back to the Mathematics Academy half-pulled and half-pulled.

"Think clearly, this is to give up your cultivation level that you have been practicing hard for ten years! And the process will be very painful and not something that ordinary people can tolerate." Walking with Bai Zhirou in the spiritual field of the Mathematical Art Academy, Jiang Cheng quietly looked at the spiritual herb in front of him and frowned.

He had looked for many people before and wanted to experiment with the second half of the human body mass technology on others, but no one was willing to give up his cultivation and re-cultivation. Even the young man in the city at the peak of body tempering gave up after a preliminary attempt. The pain was really unbearable.

"I want to try it, otherwise I don't know when I will enter the Qi training stage." Bai Zhirou nodded. When she came back, she would occasionally follow her disciples to see how they did it. She also heard that Jiang Cheng also had the second half of the body mass technician body tempering realm, but the temptation of easy tendons and marrow cleaning was too great for her.

"It is not guaranteed that Yijin and marrow cleaning will appear." Jiang Cheng said after a moment of silence. Bai Zhirou was re-training after all, and the bottleneck had been broken. Jiang Cheng was not sure whether Yijin and marrow cleaning will appear.

"I have studied the precedent of easy-to-melting marrow cleaning without drugs. I found that if a person with poorer roots and bones can break through to the Qi Condensation Realm without relying on drugs, the higher the probability of easy-to-melting marrow cleaning. On the contrary, few people with amazing talents will have easy-to-melting marrow cleaning." Bai Zhirou said lightly.

Jiang Cheng didn't speak, but just listened lightly. During this period, he had also studied these things. Not to mention spontaneous and easy-to-muscle marrow cleaning, even elixirs with the effect of easy-to-muscle marrow cleaning is not very useful to disciples with excellent talent. Their roots and bones are excellent, but the better the effect is for people with poor roots and bones.

Bai Zhirou continued: "There is another special case."

"What?" Jiang Cheng looked at Bai Zhirou in confusion.

"In history, some people occasionally disperse their skills for various reasons to retrain, but these people have a great chance of easily cleaning their muscles and marrow." Bai Zhirou smiled.

"But without data support, it's just a guess." Jiang Cheng shook his head. He believed in the data more. It was just a matter of probability that these people's tendons and marrow cleaning was just a matter of probability. Without these people's data, Jiang Cheng was not sure whether there was a causal relationship.

"I always have to give it a try." Bai Zhirou shook her head and smiled.

"There is another key point." Jiang Cheng turned his head and looked at Bai Zhiju and said, "In this way, you will experience great pain. Those who are not in a state of extraordinary perseverance cannot."

"You mean...I'm not as good as you?" Bai Zhirou turned around and looked at Jiang Cheng with dissatisfaction.

Jiang Cheng didn't say anything, but just nodded silently. After many people tried it, he gave up and did not think that Bai Zhirou was a person with extraordinary perseverance. If it were Yin Wei, it might be fine.

For some reason, Yin Wei's cold face suddenly flashed through Jiang Cheng's mind, then shook his head, stopped thinking about this question, looked at Bai Zhiru and said, "In this way, don't rush to disperse the exercises first. I'll let you do a few moves and experience that kind of pain."

"Okay!" Bai Zhirou nodded without hesitation.

An hour later, Bai Zhirou collapsed weakly in front of Jiang Cheng, her face pale and her brain was blank. The heart-wrenching pain made her even think of suicide in an instant.

"Why... I feel that the movement just now made the breath in my body unstable, and even showed signs of being possessed by the devil?" After a long time, Bai Zhirou looked at Jiang Cheng with a breath.

"This set of physical techniques is to tap the potential of the human body. Now you are at the ninth level of Qi Condensation and have already begun to experience the world. However, the foundation of physical techniques is to isolate the world and explore your own potential until you rely on yourself to explore the potential and break through the final barrier. If normal practice is to follow the heavens, then the second half of the human body numerology technique in this body tempering realm is to go against the heavens and forcefully open up the shackles that the way of heaven cannot be allowed. Of course, the qi in the body will naturally be disordered, and this is fighting against the sky." Jiang Cheng sighed. He read the Medical Book and the Taoist Book during this period to recognize why it was so difficult when he broke through. These are things that cannot be explained by the mathematics technique, or the mathematics technique can be explained, but they cannot be explained by the current mathematics technique.

"The first half follows the will of heaven, but the second half is against the will of heaven. Although the process took a lot of time, even if you can persist and practice hard, it will take at least two months." Jiang Cheng looked at Bai Zhiju and said, "So, those who are not persevering and tenacious should not learn it."

This time, Bai Zhirou didn't speak. She was originally confident enough to accomplish it, but now, after experiencing the feeling that life is worse than death in her body, she felt a little scared.

The mechanical puppet in the distance was still harvesting the spirit grass. Bai Zhirou was silent for a long time before she stood up from the ground and followed Jiang Cheng back to the attic.

"Ao~"

"Wow ~"

“Meow~”

After half a year of growth, the three little guys are now extremely large. When they see Jiang Cheng coming back, they rushed over excitedly and rubbed Jiang Cheng intimately.

Jiang Cheng leaned over with a smile and reached out to help him comb the soft hair of the young tiger. The young tiger narrowed his eyes with pleasure, but it caused dissatisfaction from the wolf dog and the cat beside him.

"I really don't know why you bought them?" Bai Zhirou squatted down and helped the kitten get his hair cleaned.

Unexpectedly, as soon as the words were spoken, the cat who had just looked enjoyable and rushed out of her arms. Her pair of gem-like eyes stared at Bai Zhirou and a roared from her mouth.

The young tiger and wolf dog also stared at Bai Zhirou with a bad look on his face.

"They..." Bai Zhirou looked at the scene in surprise and said in surprise: "Can they understand people's words?"

"I made a magic weapon for them!" Jiang Cheng pointed to the jade pendant on the cat's neck: "The spiritual array is engraved on it, and now it seems that it has some effect."

Unfortunately, it is still much different from his expectations. The three little guys can understand people's words now, but it is not easy to complete some difficult movements. The three little guys will resist. Jiang Cheng can only explain some simple methods of body refining to them, hoping that they can obtain greater resources in this spiritually abundant Tianyuan City.

"Material...Material Artifact?" Bai Zhirou stared at Jiang Cheng in disbelief. She knew that Jiang Cheng was also good at refining weapons, but configuring magic weapons for cats and dogs was too extravagant, and it was such a useless spiritual array. What else could it be for them to be smarter?

Bai Zhirou looked incredible, but in Jiang Cheng's eyes it was natural. This low-level magic weapon can be refined at will, so it is naturally not a rare thing. Besides, although these three little guys don't have any powerful bloodlines, just like Jiang Cheng said, having a good reputation is enough. How to spoil your pet and what does it have to do with others.

"Think about it carefully. I am now preparing to start studying the numerical techniques of the Qi Condensation Realm. Maybe there will be a way to help you break through at that time." Jiang Cheng thought for a while.

He now feels like he doesn't want to rely on the system. Although the system has opened a door for him to enter this ocean of knowledge, if everything depends on the system, if one day the system is gone, who will he rely on? People still have to rely on themselves.

"Is there no other way?" Bai Zhirou gritted her teeth.

Marrow-cleaning pill is a special pill, extremely precious. In the entire cultivation world, there are not many pills that can improve roots and bones, and you may not be able to buy them if you have money. Jiang Cheng's human body numerology is the only opportunity she can seize at the moment.

"If you want to fight for your life with heaven, you will always have to pay some price." Jiang Cheng shook his head and gave up the other party's idea. Going with heaven depends on your roots and going against heaven depends on perseverance. If you don't have any, you can only be a mediocre person and be ignorant for the rest of your life.

"Don't rush to answer. I have to study some things these days. I will keep in the library. If you have any questions, just go there to find me." Jiang Cheng teased the three little guys for a while, and saw Bai Zhirou still struggling, and said softly.
Chapter completed!