For Wei Zi, every upgrade of the system will further improve his strength.

However, unlike the mood of the previous four system upgrades, when the level of the system was raised to level five, Wei Zi's mood was more excited than any previous system promotion.

The reason is simple, after the level of the system reaches level five, he can convert the energy particles in the air into biological energy that was previously only produced when the system is promoted.

Although Wei Zi doesn't know much about this kind of wonderful biological energy, all the previous experiences have surfaced, and this kind of biological energy is very magical.

The use of this bio-energy can not only strengthen the body, but also treat some very difficult diseases. Among them, the most specific example is that Wei Zi used this biological energy to cure Yezi's leukemia.

Of course, one of the most fundamental reasons why Wei Zi was so excited was that when he faced that guy who was hiding in Japan but cultivating the evil alien true qi, he would no longer have to be as timid as before.

No, after the system was promoted, according to the usual practice, when the system was reset, Wei Zi couldn't wait to say: "Old Hei, how to convert the energy particles in the air into biological energy?" ”

did not answer Wei Zi's question, but directly pulled Wei Zi into the virtual space of the system.

"In the future, as long as you follow this path to run the energy cycle, biological energy will naturally be born in your body." Pointing to a human figure marked with many small dots all over his body in front of Wei Zi now, Lao Hei said to Wei Zi.

Hearing Lao Hei say this, Wei Zi hurriedly turned his gaze to the human figure marked with many small dots.

As Wei Zi's gaze shifted to the figure of the human body marked with many small dots. Suddenly, a bright spot appeared on that figure of the human figure. At the same time, after that bright spot appeared. It began to operate according to a special path, completely different from the previous energy cycle.

"Whew!"

Exhaled lightly. Without Lao Hei's reminder, Wei Zi began to memorize it attentively.

Soon, when this point of light returned to the Qi Sea Cave, it meant that the new energy cycle demonstration was completed.

Unlike the first time when Lao Hei helped Wei Zi build an energy cycle, this time Wei Zi didn't need Lao Hei to help him. No, after the demonstration of the system was over, Wei Zi hurriedly retreated from the virtual space.

"Alright! Give it a try first and see how about the new energy cycle? With a secret sigh in his heart, Wei Zi didn't move. Instead, he was still lying in place, and according to the new energy circulation trajectory, he began to slowly push the energy air mass in his body, which had become much smaller, and began to operate in his body.

So, as the new energy cycle operated, the energy particles that had regathered in the air once again accompanied Wei Zi's breathing, from his nostrils and pores, into his body. and eventually merged into the energy mass that had begun to move slowly.

It's just that, according to the new energy cycle, it probably ran for less than ten minutes, and Wei Zi's brows couldn't help but wrinkle. Meantime. I saw him ask, "Old Black"

"Don't you think it's a little harder than the previous energy cycle?" Without waiting for Wei Zi to finish speaking, he listened to Lao Hei interrupt.

Hearing what Lao Hei said so casually, Wei Zi couldn't help but pout. He really wanted to tell Lao Hei that he had just successfully built a new energy cycle. It's not a little bit harder than the previous energy cycle. The degree of difficulty can be said to be increasing almost geometrically.

But. Hearing Lao Hei say this, Wei Zi knew that Lao Hei what he wanted to say should know, so he simply kept his mouth shut.

"The reason why you feel that the new energy training is increasing is because a large part of the energy ions absorbed from the air according to the new energy cycle are used to convert into biological energy, so when you run the new energy cycle, only a small part of the energy particles will be integrated into the energy air mass in your body." Old Black explained.

Although he had been prepared in his heart, hearing Lao Hei say this, Wei Zi couldn't help but feel a little depressed in his heart.

You must know that according to Lao Hei, it means that Wei Zi has to spend more time on cultivation. In this way, we can ensure that the bioenergy in the body is sufficient, and at the same time, the level of the system can be improved normally.

"Lao Hei, now I know that in the time and space before you, why are there so few super special forces after level five?" Wei Zi said with a depressed face.

"That's right, unlike your world, which has not yet been invaded by cultivators of the alien True Qi, in the time and space before me, once the host of the system reaches level five, then he will be immediately sent to the battlefield. After all, no matter who it was, only when the biological energy was sufficient, would they have the capital to deal with those cultivators of the alien true qi. Therefore, after reaching the fifth level, in addition to not having enough time to continue cultivating, the average host can only be forced to go to the battlefield and fight those cultivators of the alien true qi. Old Black explained.

Although he only knew about the cultivation of alien true qi from the old black mouth, Wei Zi could imagine how tragic the hosts of those systems in the different time and space would be when they tore apart and killed those cultivators of alien true qi.

After all, Lao Hei's previous host, but at the last moment, he chose to expose himself and die with the enemy.

So, thinking of the terrifying nature qi cultivators of those different species, and thinking of the guy who was like a maggot of tarsal bones hiding in Japan, and he didn't know when he would launch a surprise attack on him, Wei Zi couldn't help but feel that the burden on his shoulders was much heavier.

"Old Black, let's continue!" Taking a deep breath, Wei Zi said to Lao Hei.

So, after the system reached the fifth level, before Wei Zi had time to be happy, he closed his eyes again and started a new round of cultivation journey.

It's just that after following the new path of energy circulation, Wei Zi found that the energy particles that were originally filled in the air were no longer enough to support his next step of cultivation. So, with a slight sigh, Wei Zi said, "Old Hei." Looks like we need to choose a good place again. ”

Wei Zi's meaning, Lao Hei naturally understood. I also know that after the difficulty of cultivation has increased exponentially, with the current environment of Yenching University. In other words, with the current environment in the Yanjing region, it is simply not enough to support Wei Zi's cultivation.

"Yes, it's time to change places, but with the current ecological environment of Huaxia, I really can't find a few good places." After thinking about it, Lao Hei said with some regret.

At present, the deterioration of China's overall ecological environment can be said to be entirely caused by China's modernization and development. What about this? Although Wei Zi personally felt some regrets, he couldn't stop this process with his personal strength.

"Old Black, I was in your plane before. How do people protect the environment? Is there any technology that we can use to use in this area? Thinking of the deteriorating ecological environment in China, Wei Zi couldn't help but say to Lao Hei.

"Unlike your time and space, although the time and space I was in before was also very technologically advanced, a good ecological environment was essential in order to fight against the cultivators of the alien True Qi. So, in the previous plane, no matter what people did, the first thing they thought about was whether their actions would have an impact on the environment. It is also because we care so much about the environment. So in the time and space before me, people not only enacted extremely strict environmental protection laws, but also vigorously advocated and developed environmental protection technology. Lao Hei said.

"Lao Hei, then you mean you have this environmental protection technology in your hands?" Listen to what Lao Hei said. Wei Zi couldn't help but say happily.

"Not bad! Although when the system was first designed, it was designed not to allow low-tech civilizations to export more technology than their own. However, outside of this setting. There is also a rule, that is, when facing the invasion of alien True Qi cultivators. This premise can be broken. So I can provide you with the technology to do that. Lao Hei said.

I heard that Lao Hei could provide himself with environmental protection technology. Wei Zi looked very happy. However, Wei Zi still couldn't help but ask: "Lao Hei, why do you want to set the system like that?" ”

"That kind of setting?" Old Black asked knowingly.

"It's not allowed to export technology beyond their own technology to low-level civilization planets?" Seeing that Lao Hei pretended not to understand his words, Wei Zi had no choice but to make his words clear.

"Do you think it's a good thing or a bad thing that these countries on your planet are getting technology that is higher than their own technology?" didn't answer Wei Zi's question directly, Lao Hei asked rhetorically.

Although he is not yet twenty years old, after systematic special training, Wei Zi's knowledge at the moment can be said to be almost no less than that of a small library. So, he quickly figured out the meaning of Lao Hei's words.

"Needless to ask, it's certainly not a good thing." Wei Zi replied without hesitation.

Nodding, Lao Hei said: "No matter what kind of technology it is, it is actually a double-edged sword. Therefore, while science and technology are developing greatly, people's minds must keep up. Otherwise, technology will only become a tool in the hands of some people or groups of people to carry out their personal intrigue. For example, "

"Germany, for example." Before Lao Hei could speak, he saw Wei Zi rushing to say; "During World War I and World War II, Germany's technology was very advanced, more advanced than any other major country at the same time. However, under the leadership of some people, advanced technology did not bring happiness to the German people, but brought war. Needless to say, I think I understand what you mean. ”

Seeing that Wei Zi had understood what he wanted to express, Lao Hei stopped dwelling on this topic.

As for Wei Zi, he focused all his attention on the new energy cycle.

"Ah Zi, Lu Yunshan's phone." About half an hour after re-entering the cultivation state, Lao Hei's voice sounded in Wei Zi's head.

Instead of withdrawing from the cultivation state, Wei Zi directly entered the virtual space of the system.

"Prince, what's the matter?" In the virtual space, after connecting Lu Yunshan's phone, Wei Zi asked directly. As for the "prince" in Wei Zi's mouth, it is Lu Yunshan's nickname.

"Ah Zi, do you have time now? The brothers need to hurry up and practice together now. Lu Yunshan said to Wei Zi in a somewhat anxious tone. (To be continued......)