Ye Chen picked up the four pieces of equipment respectively, looked at them a few times, checked the daily forms displayed on their respective introduction screens, and had a new understanding of the civilization level of the "Alliance":

"Keane α light energy curing device, the usual form is just a small brooch with a whole body silver and a radial pattern in the center, I read the news before that the United States has developed an item similar to a light energy shield, but its volume is said to be 10,000㎥ in size, and not to mention its chicken rib defense efficiency, just ten minutes of operation will cause the New York City power grid to be deactivated due to overload, the civilization gap is really big!"

After Ye Chen sighed, he put the Keon α Light Energy Curing Device on his chest and picked up another piece of equipment

"Ain Initial Experiment-Grade Particle Shield? That's it! I thought it was a button, but the dark color scheme was a little weird, and there were some white spots flashing on the surface, and it was the word "experiment" that made me a little panicked! But I guess it's much more reliable than those experiments in the laboratory that suddenly explode at every turn, right? Well! Give it to Zheng Feng to use, let's experiment first. ”

He patted the round "button" with a diameter of less than 4cm, silently blessed Zheng Feng a few words, then put it in his pocket and looked at the next item

"Train-mounted military instant shield generators, huh! Well? I didn't find out just now, it's military! I said that compared with the previous few pieces, it is a little special.,You can set your own form according to the holder's requirements.,Although there's only one chance.,But this makes the enemy can't imagine what you're carrying with you is a defensive tool.,Rush this.,I've also picked up a treasure.,It's that the limit of this defense is a little big.,But it's nothing to use properly! ”

Ye Chen looked at the one-meter-high cylinder in front of him, clasped his elbows with both hands, and thought for a while, but he still didn't make up his mind how to use this only shaping opportunity

"Forget it, let's talk about it then, I already have one now, let's put it first! I'll talk about it when it works. ”

He touched the "brooch" on his chest, shook his head slightly, walked past the display case of the military instant shield generator, and walked towards the last piece of defensive equipment, but when he saw the display case of the last piece of equipment, he only felt that his long-standing concept of physics had been impacted:

"Is this the Silky II. escape cover device? No way! This tube of blue liquid is a defensive weapon? I'll make up the sky with stones, Nuwa! What the hell is this? No, I'll have to revisit how to use it."

Ye Chen hurriedly called up the particle introduction screen of the Sien II. escape cover device, read it carefully, and after reading it, he couldn't help but sigh again:

"This kind of defense equipment actually works by injection into the body, okay! I don't understand the world of the fourth-level civilization, or will they play ......"

He picked up the tube of blue liquid and thought about how to get it into Yu Yueying's body, but somehow, he suddenly thought of something ambiguous

"I'll go! Ye Chen, how and thirsty you are! Isn't it fragrant to learn it? Well! Go learn to calm down. ”

Ye Chen teleported the third and fourth pieces of equipment to the system space for his own convenience, and then he took the "brooch" and "button" with him and returned to the pure white system space

He did not hesitate, and immediately said to the system:

"System, use 60 life essence to upgrade my nerve strength!"

"Unconfirmable instructions

Reason: The difference between mental strength and muscle strength levels is too large to be upgraded, please develop in balance"

The cold mechanical female voice of the system came beyond Ye Chen's expectations

"Huh!? And this level balance setting? After all, Chinese education is now pursuing a quality education line of all-round development, and this is also a means of self-improvement. ”

Ye Chen thought for a moment, and then asked the system:

"Then how many levels do I need to increase my muscle strength before I can continue to upgrade my mental strength?"

"Retrieving at the request of the host......

Mental Strength Upgrade Requirements: The level difference between muscle strength and subsequent lifeform upgrade types should not exceed ±2"

Ye Chen lowered his head and pinched the bridge of his nose with his hand, and began to think about the information in the system's answer:

"There's also a level difference limit, that's it! Just take it as a gym, huh! Let's get started."

He paused, ready to upgrade his muscle strength, but suddenly, Ye Chen seemed to have discovered something from the conversation in the system just now:

"Huh? Well! Does the system say that there are other types of lifeform upgrades? What does this mean, do I still have hidden attributes? ”

Thinking of this, Ye Chen couldn't care about upgrading, and asked straight to the system:

"What other types of upgrades? You mean I don't have the full power of the system yet? ”

"Yes, the host's current life level is too low, and it belongs to the low-level creatures in the low-level space civilization, and it cannot fully adapt to the huge energy attached to the system, so the system shrinks a part of the energy it carries and gradually opens up with the provision of the host's life form level

Current space energy available to the host: 40%"

Ye Chen patted his head and said to himself in a sudden realization:

"I see, I was still wondering why there are only two contents for upgrading in the fourth-level civilization, and it is really my current lack of ability......"

Suddenly, Ye Chen seemed to realize something again:

"Hmmm! You say I'm a low-level creature in a low-level civilization, and I'm your host! You ......"

The system ignored Ye Chen's complaints, and said directly:

"Please confirm the upgrade command on the host!"

"Alas! Forget it, it doesn't make sense with your system, let's upgrade"

Ye Chen said helplessly

"Convert all remaining life essences into experience points, then increase your muscle level to LV2, and add the rest to your mental strength upgrade!"

"Confirmation of the upgrade order! Exchanging XP......

Complete the redemption for a total of 435 XP

Note: 1 Life Essence = 5 XP

Remaining Life Essence 0"

The exchange data was quickly fed back to Ye Chen through the system's particle solid display, Ye Chen glanced at the data, sighed slightly, and allocated the experience points to the system for upgrading

A dazzling light curtain fell from above the system with no end in sight as usual, enveloping Ye Chen

Then a sharp pain rushed from Ye Chen's limbs to his chest, and there was a strong discomfort in his brain as if it had exploded

Ye Chen gritted his teeth, hoping that this pain would pass soon

About three or four minutes later, the light curtain dissipated, and Ye Chen's legs were weak because of the severe pain just now, and now he immediately sat down on the ground without support

After relieving for a while, Ye Chen complained to the system in an extremely resentful tone:

"I'm now beginning to suspect that you are an undercover agent sent by the mechanical civilization, and you are torturing me every time you upgrade, I'm afraid that I will ascend to heaven and return to the West?"

"Please don't panic, this system is a system developed by the "Alliance" to fight against high-level hostile civilizations, and it is by no means on the side of mechanical civilizations

As for the host's intense discomfort every time it upgrades, it is due to the host's low physical fitness

The upgrade standard of the system is mainly based on high-intelligence life forms that have been strengthened and the quality of the system is mainly high-quality, and the host has only reached 45% of the highest quality of life on earth, and it needs to be strengthened to alleviate the side effects of the upgraded system."

After hearing this, Ye Chen smiled and stretched out the thumb of his right hand, and then turned it upside down

After completing the "friendly" greeting to the system, Ye Chen began to adapt to his body

He looked at his arm, which was less different from before, and felt the far greater power in it than before, the discomfort just now had completely subsided, replaced by the vitality that made Ye Chen extremely comfortable, and Ye Chen found that he had better control over all parts of his body, especially the speed of thinking and reaction was faster

The system reported the results of this upgrade as Ye Chen adapted to his body:

"This upgrade has been completed ......"

"Host muscle strength rises to LV2 (0/350)

Nerve strength rises to LV3 (376/400)"

"Huh? Mental strength hasn't been upgraded yet? Just a little bit? Oh my God, my obsessive-compulsive disorder has been forced out, by the way, don't I still have 8 points? There are 16 points for turning into Life Essence, which can be exchanged for 80 experience points"

Ye Chen thought about it, considering the future exam, he thought that the improvement of spiritual strength was crucial to his own effect, so he exchanged 80 points of experience according to this logic

After another painful escalation, Ye Chen's mental strength finally rose to LV4 (56/450)

Later, the system also prompted Ye Chen to get a passive skill:

"The host's mental strength level has been increased, and a passive skill: mnestic enhancement LV1 has been obtained

Effect: When the host memorizes civilized languages such as words and symbols, the memory efficiency is increased by 30%, and the thinking processing efficiency is increased by 20% (the effect changes with the improvement of host parameters)

Limitations: It is limited to memorizing civilized languages such as words and symbols, and there is no time limit."

"Oh! It's just tailor-made for my current mission! This exam is estimated to be stable! ”

Ye Chen accepted this skill with satisfaction, took two pieces of defensive equipment, and returned to the dormitory, which was already approaching dusk

Outside the window, half of the sky is obscured by the towering building, and on the other half of the sky is a large cloud with gold trim, illuminating the clouds transparently. Phnom Penh dimmed, and the large cloud hung like old tattered cotton wool in the graying sky. Twilight fell silently in the bustling downtown area of Shenzhen

"It's so late? I didn't think time flies so quickly in the system space, so it's okay, let's find a book! Prepare now"

Ye Chen watched as the afterglow shone in through the window on the side of the dormitory, making the dormitory brighter in an instant

Then, he took out the library card he had applied for in the integrated table under the bed, and prepared to borrow some books for revision when the library was not closed

Just as he was about to go out, Ye Chen saw a young man open the door and walk in first, still holding two lunch boxes in his hands

Wang Guodong looked at Ye Chen in front of him, and then looked at the bed that had been made by the window, and immediately understood that his new roommate was Ye Chen

Ye Chen was also a little surprised, after all, Xiamen University is estimated to enroll about 800 preparatory students, and in the case of 20 dormitory buildings and thousands of dormitories, the classmate he just helped can still be in a dormitory with him, which is also fate

Ye Chen smiled slightly, looked at Wang Guodong and said:

"It's a coincidence! From now on, we will be roommates, and we will advise you on something! ”

Wang Guodong himself is a very life-fearing person, and he didn't dare to speak just now for fear of offending people, but now Ye Chen's friendly attitude reassured him, so he hurriedly responded:

"Yes...... Okay, if I have something bad in the future, please correct me, right...... I've heard that a new roommate will be here this afternoon, and I just brought two meals, so if you don't dislike it, take one? ”

Ye Chen glanced at the lunch box that Wang Guodong handed him, and then looked at the lunch box that Wang Guodong kept for himself, and it could be seen from the packaging that the food he gave himself was much more expensive than what Wang Guodong ate himself, which gave Ye Chen a preliminary understanding of Wang Guodong

Ye Chen smiled and thanked him, and took the lunch box, just as he hadn't had time to eat because he had upgraded in the system before, so he opened the bamboo chopsticks and ate them

"Perhaps, this is the first friend in my college life, right? Friendship is enough."

Ye Chen glanced at Wang Guodong and began to enjoy the food......