According to the information provided in the database, Yinhe can give some very professional, long-winded, but unclear explanations to Liu Gan, but these explanations make Liu Qian drowsy and never grasp the point.

After realizing that those complicated scientific instruments were of no use to her, Liu Qian did not let Yinhe continue to explain the information in this way, and only asked her to carefully look for some spare parts that would be useful to herself, and strive to make her lunch box when she left.

However, Galaxy was clearly not only interested in her lunch box, she was like a hard-working ant, and soon collected piles of strange accessories and materials, so many that she couldn't carry them at all.

"Your lunch box...... Does the charger need to be so complicated to make? Liu Qian couldn't stand it anymore.

"No, these are devices used to make extraction nanobots, these are devices used to make injection nanobots, and if the materials are sufficient, I would like to give my body some modification of the circulatory system." Yinhe explained to Liu Qian.

"Do you need electricity to make these things?" Liu Qian asked Yinhe again.

"Absolutely." Galaxy nodded.

"Then just make a charger for the time being, you can't do anything without electricity, and you will talk about other things when you have a chance later." Liu Qian had to stop the galaxy, otherwise the things she had collected would not be needed for the time being, but they would greatly increase her burden.

Yinhe looked at Liu Qian with wide eyes, it was obvious that she didn't want to give up these hard-earned things.

"In a person's life, there will be a lot of burdens that you can't give up in your feelings, but they are actually useless. If you don't know how to give up, you can't continue to move forward, and staying where you are for these burdens is not only dangerous, but also makes you lose the opportunity to appreciate more beautiful things in the future, understand? Liu Qian had to talk to Yinhe about philosophy.

"Okay, I'll hide these things and come back and get them later." Yinhe was a little reluctant to sort out the spare parts she found, and finally only chose the accessories needed to prepare the simple charging device, and left some other important parts that were small in size and did not take up space, and then she and Liu Qian got back on the road.

On a certain floor of the biochemical materials laboratory, Liu Qian found a roll of rope, which was about two or three millimeters thick, and after being coiled, it was at least a few hundred meters long according to the nominal of the small handwriting on it, but it felt as light as nothing in his hand.

"I know this material." Galaxy opened her mouth when she saw the rope.

"What is this made of?" Liu Qian tried to pull the rope and found that the thin one was very strong.

"It is a biochemical material, a material that is very close to the skin of my body, extremely tough, even if it hangs a heavy object of nearly a ton, it will not be broken, and the limit load can even reach about two tons." Galaxy replied to Liu Qian based on the information in the database.

"Won't it?" Liu Qian tried to tear the rope open and put it on the ground, and then slashed a few axes with a fire axe. As a result, the floor was cut with a fire axe, but the rope was unscathed.

"It's a good thing, it's the most useful thing to climb, tie up, and it doesn't take weight to carry on your body." Of course, Liu Qian put the rope into his backpack.

……

At noon, when he went up to about the fiftieth floor of the building, Liu Qian heard some slashing sounds, needless to say that they must have been the three players found by the previous detection device. Liu Qian lightly touched it and looked at it, and found that it was two men and one woman who were slashing the zombies in the corridor there.

The weapons in their hands were three fire axes found in the building, apparently because they felt that the initial weapon was not easy to use, so they threw them all away and replaced them with this fire axe. The cooperation between the three of them when slashing zombies seemed to be very tacit, and judging from the physical strength, speed, and agility they were showing now, they should have all been at least above level three.

There is no doubt that they are also players who came in when the server was opened, but they were directly teleported to the building, and they have probably been slashing and killing these ordinary zombies in the building for the past three days, and they have a certain amount of combat experience and have been upgraded.

The mutant zombie found by the detection device stayed on more than eighty floors and did not encounter them, otherwise with their current skills, most of them would not be able to withstand the attack of the mutant zombie.

These three people are not the kind of people who are extremely vicious, and Liu Qian did not see this from their faces, because it was ...... One of these three people he actually knew...... The man who took the lead was his high school classmate, what was his name? It seems that the surname is Zhang, and I can't remember the specific name of Liu Qian.

Zhang's temperament and personality belong to the more enthusiastic and bold type, but Liu Qian has always been very low-key and does not belong to the same circle as them, so there is not much interaction between the two.

Since there are not too many dealings, then ...... There is no need to say hello when you meet.

Just as Liu Qian was about to give up the exploration of this layer and go up to the higher level to staggered past them, the two men and one woman suddenly had a problem.

Originally, they were only slashing and killing two zombies, but suddenly three zombies rushed out of the next room, and the siege of the five zombies caught them a little off guard, and the formation was disrupted, and it seemed that they might be in danger at any time.

Originally, with their level, it should be enough for three people to deal with five zombies, but it is likely that they have not found enough food in the building in the past few days, so their physical strength is a little exhausted and even has a tendency to run out, so they will be a little powerless when dealing with five zombies at the same time.

After all, it's a high school classmate......

Liu Qian rushed over, waved the fire axe in his hand and killed the zombies in three strokes, five to two, and helped the small team of two men and one woman to relieve the siege.

When Liu Qian just rushed over, the two men and one woman were startled, and they were slightly relieved when they saw that the other party was helping them kill zombies. After classmate Zhang glanced at Liu Qian, he immediately recognized Liu Qian.

"Is that you? Willow...... Dry? Zhang obviously remembered Liu Gan's name, and he was very happy after recognizing Liu Gan, it was not easy to meet acquaintances in this trembling world.

Zhang's name is Zhang Shengli, although he remembers Liu Gan's name, but Liu Qian doesn't remember his name. When Zhang Shengli said Liu Gan's name, the woman next to him also looked at Liu Qian and seemed to recognize Liu Gan, but Liu Qian had no impression of her at all.

"You're playing this game too?" Liu Qian had no choice but to find something to say to them.

"I haven't seen you for a few years, old classmate, I didn't expect to meet here! Our situation just now was very dangerous, but fortunately you acted in time, otherwise we would be in trouble. Zhang Shengli thanked Liu Qian a few words.

PS: In the new week, at the critical moment of the new book list, I ask my brothers and sisters for recommendation votes, thank you!