When passing by Yu Jiuchuan's room, Mo had to stop, thought about it, and then stepped forward and knocked on the door.

"Who?" Yu Jiuchuan asked as he opened the door, but found that Senior Brother Mo De was standing outside his door.

Mo De was not surprised to see Yu Jiuchuan dressed in pajamas, but asked with a smile: "Has Senior Sister Jiuchuan finished eating?" If not, I can just drop by and bring one back for you. ”

Obviously, Yu Jiuchuan returned to the room at noon, and after changing back into pajamas, she had been reading a book, and she had long forgotten about dinner or something.

"Then it's troublesome Senior Brother Mo." Yu Jiuchuan didn't see Mo De, and asked him to help him bring a rice bowl back.

After hurriedly picking up the wool in the Vision Pavilion, Mo had to wander around the cafeteria, taste five or six windows before filling his stomach, and return home with Jiuchuan Senpai's tomato scrambled egg rice bowl.

Knocking on Yu Jiuchuan's door again, Mo had to hand over the lunch box and then turned to leave.

This time, Senior Sister Jiuchuan still didn't seem to realize that the buttons at the collar position of her were not fastened.

Silently ignoring the indecency in his heart, Mo had to go back to his room and brew another cup of coffee to dispel distractions.

He didn't seem to realize that this was the second cup of Huo Yufei's exclusive secret specialty coffee he drank today.

That night, Morder's room was brightly lit, and a figure sat quietly at the table studying until dawn......

......

On Saturdays and Sundays, Professor Dong was still not busy with the inventory work at hand, so the lecture was temporarily taught by another teacher from the metal department of the college. However, although the same lesson plan was used, this teacher was not as charming as the old professor, and he couldn't help but miss the good old days after listening to a lecture.

Lunch and dinner were still brought back to the apartment for Yu Jiuchuan, and the book "Metal Nature Science Fool's Guide" in Mo De's hand was also turned to the end under his day and night study.

In the final part of this fool's guide, Morder is briefly introduced to the classification and general classification of exometals.

Unlike metallic elements, heterogeneous gold is mostly stable in elemental form, and its properties far exceed those of ordinary metals.

For example, if the "streamer soft silver" that Mo De saw in the previous big evaluation is processed and formed under certain conditions, then even if it changes shape after external force, the metal products can be restored to their original state before reaching a critical point.

Because the existence of heterometallic is very rare, so human cognition of heterogeneous gold is still in the exploration stage, the production capacity of using existing technology to make heterometallic gold is very low, and most of the valuable exometals, which are now in circulation, are mined from various mining areas.

All exotic gold veins are rare resources highly valued by various countries, and local governments will send heavy troops to defend the mining area.

Morder took out the alien gold nuggets he had smelted with black fire and compared them with the various alien metals recorded in the book, only to find that they did not seem to belong to any of the recorded alien metals.

In desperation, Mo had no choice but to draw on the classification techniques of the book for different gold, and re-refined and classified these mixed gold nuggets into five categories.

The five types of gold vary in nature.

Some of the exotic gold is not small but light as a feather, as if it can be lifted out in one breath; Some of the gold heaviness is not big but weighs as much as Mount Tai, and if it weren't for the metal ability running all the time, I would be afraid that it would collapse the table and smash the floor.

The surface of some exotic gold shows a flowing color luster, which looks extremely strange; Some of the outer layers of exotic gold are glowing, giving people a feeling of cold suffocation.

The fifth type of exotic gold is the rarest in quantity, a small ball of metal with a copper-colored glow.

Feeling the short blade he had forged earlier, he had to put it in his hand, and then twisted the metal ball, carefully perceiving the similarities and differences in the structure of the two.

In the end, Mo had to conclude that the two things should belong to the same category, except that the shortblade made of dead gold was purer.

And the purity of the foreign gold in the short blade is much, much lower than the copper buckle gold condensed in his body.

It seems that these copper-colored metals will eventually be purified and evolved into copper-clad gold-like exometals, under the continuous incineration of black fire.

Perhaps it is a bit inappropriate to call these metals purified by the Black Fire Sacrifice Alien Gold a little bit inappropriate. Mod thought about it and decided to give a name to the strange metals he had.

Let's just refer to them collectively as "boundary gold".

As for the copper buckle gold in his hand, which has been pure to the limit, Mo has to plan to call it "boundary copper" for the time being.

After all, this bit of copper buckle gold seems to have a deep connection with the Boundary Void Stone scabbard......

......

Su Ziwen frowned, once again rejected a three-way university principal who came to talk to him, quickly settled his lunch and walked in the direction of the reception apartment building.

Since the completion of the second mutation of the ability, her sense of existence seems to have been greatly strengthened, and an ethereal and clear temperament emanates from the inside out, making her the focus of attention wherever she goes.

This ethereal temperament like a fairy makes Su Ziwen have a headache now, because she doesn't want to be too conspicuous in the crowd.

Su Ziwen also went to consult Teacher Chen Yue about what was going on in her own situation, and after Chen Yue looked up and down, she only came to the conclusion that she was about to break through to the late stage of the body realm, saying that maybe it was the dispersion of space power caused by the imminent breakthrough, and it should return to normal when the breakthrough was completed.

Glancing at the room next to him, Morder's door was still tightly closed.

Thinking of that guy, Su Ziwen couldn't help frowning his slender brows.

Every morning when she met with Mord these days, she could smell the rich smell of coffee on that guy's body. I don't think this guy has been staying up late.

"Sister Ziwen is good!" A crisp voice came from behind Su Ziwen, interrupting the girl's ethereal thoughts.

"Oh, Xiao Feng is back too." Su Ziwen turned around and saw the silver-haired and silver-eyed Ivanotti Feng jumping up and running from the side of the corridor.

"Isn't it going to enter that 'Fengjue Tower' tomorrow, I'll come back early today to prepare." The little girl replied briskly.

That's right, today is already Sunday, and tomorrow Monday is the day to enter the Fengjue Tower.

"Prepare well." Su Ziwen waved goodbye to the little guy, turned around and walked into his room.

Su Ziwen didn't know much about the academy's treasure, the "Fengjue Tower", but she remembered what Ms. Chu Fengyi said.

The more prepared you are and the stronger your foundation, the more you will be able to grasp it firmly when you encounter an opportunity in the tower.