Once again, there were only two people left in the room. The magic lamp had been extinguished, and Lan Bing, who was sitting on the edge of the bed, was in a mess, and although she had said that it didn't matter, she still couldn't stop thinking about how to spend the night.

Her heart was pounding, and it was the first time she had been alone in a room with someone of the opposite sex, let alone spending the night...... Hot blood poured up her white cheeks, burning her sleepiness at once.

Lan Yu was counting the materials brought back by Liu Xiaoxiao, and found that the saltpeter materials were enough. He couldn't work without a bottle of sulfur and nitrate - and even if he did, he wouldn't dare to configure it in a poorly lit hotel, because if something went wrong, the whole hotel would be blown up.

He planned to take advantage of the curfew time to go to the alchemy shop to find materials by himself, and maybe he could rent another alchemy room to use......

He paced, and inadvertently saw Lan Bing clasping his hands in a daze, Lan Yu asked, "Lan Bing, what's wrong with you, are you uncomfortable again?" ”

"Uh... Yes.. It's nothing. She stammered back, "I'm wondering if there's anything else in the plot that could be used for us, I just came up with an idea.......... Don't sleep on the floor, if you don't rest well like this, you'll be delirious the next day, if you miss something....."

Lan Yu understood when he looked at Lan Bing's expression. He didn't break the girl's thoughts, but said, "I'm going to take advantage of the curfew time to go to the alchemy workshop to have a look." Probably won't be back until tomorrow morning. It's not early, you have a good rest. ”

With that, Lan Yu left, and he walked up the moonlit street in the direction of the alchemy workshop.

The windows of the alchemy workshop facing the street are lit, which means that there are people in the alchemy room.

Seeing this, Blue Feather's heart sank to the bottom as quickly as an iron block in the water. But he still had the idea that he couldn't come in vain, and was ready to go in and have a look

The doors of the alchemy workshop were open, the lights were brilliantly lit, and a group of alchemists were working without sleep, and the voices of talking about the alchemy formula came from time to time, and there were no complaints about overtime - they all came voluntarily and without pay - to work for the motherland, and they did not feel tired for a long time.

Lan Yu walked into the door, and the staff in charge of hospitality were busy delivering materials to the alchemists, until Lan Yu walked to the front of the service desk, and he saw a guest coming.

"I'm sorry, sir, I didn't notice you just now, may I ask if there is anything I can do for you?"

Lan Yu lied without changing his face: "I am a free alchemist, and just now I received a commission from several warriors, and they asked me to refine props for them. But my utensils were damaged during overwork.

In order to fulfill the commissions of the warriors as soon as possible, I have not had time to put on my uniform and come to you, can you provide me with an alchemy room and caustic acid? And offer some utensils? ”

After that, Lan Yu pointed to his dark circles, and deliberately let the waiter see the materials he was carrying.

"Hats off, we'll give you everything for free." The waiter bowed respectfully to Blue Feather.

He did not question the rhetoric of the person in front of him, and the folk alchemists of Acacia were widespread in the academic atmosphere, and it was entirely possible that the master of it would receive a commission from the warrior.

There is no market for "education" discrimination here, and the Acacians pay more attention to their own abilities.

The waiter went inside and said to Lan Yu, "Sir, the current alchemy room is full, so I can only ask you to work in the hall." But the alchemical vessels are superfluous, please come with me. ”

The waiter led Lan Yu to a corner of the hall and brought Lan Yu utensils and two acids. Lan Yu glanced at it and found that test tubes, beakers, flasks, and crucibles were all available, and he even saw a magical version of the alcohol lamp.

It seems that how to use this "alcohol lamp" can only rely on Lan Yu to think about it, if he asks, he will definitely reveal the stuffing.

"Sir, I don't mean anything other than curiosity. Why do you need so much acid? These things are useless except for disposing of waste residue. ”

(useless?) They're so useful. ）

Lan Yu retorted inwardly.

Out of respect for the patriot, he answered the waiter's question: "This is my unique secret recipe, and I will not pass it on." ”

"I'm sorry." The waiter immediately apologized - Acacia valued magic and alchemy patent protection, and it was an offense to ask someone else's alchemy recipe.

"It doesn't matter." Blue Feather waved his hand.

"Sir, if you need more acid, please take it yourself, there are more on the counter, I'm going to miss the company, and the other alchemists still need my help."

After the waiter took his leave, Lan Yu took out the materials and arranged them in different categories, he fiddled with the "alcohol lamp", and a stream of flames came out of the runes, and the flames were stable without a trace of fluctuation.

Seeing this, Lan Yu sighed at Acacia's advanced magic technology. And then there was a deep concern - what would happen to the Shurima Empire if Acacia was so? How strong should the void that destroyed them be?

How big is the world behind the "window"?

Lan Yu didn't think much about it, he poured the wine and oil into the test tubes separately, and began to process the various materials.

…………

The most critical step is to heat the feedstock under catalytic conditions to produce a nitrification reaction. This is a very dangerous step that requires precise control of the temperature, and if the temperature is too low, the reaction cannot be carried out, and too high a temperature can lead to acid sputtering and even an explosion........

Successfully formulated, filtered, and dried, Blue Feather got the final product, and he carefully collected the powder, poured the powder and flour into an iron flask in proportion, and sealed it. Then carefully wrap it in flannel.

There were also seven iron cylinders neatly arranged on the table, waiting to be filled.

The crowd was woken up by the sound of smashing in the street.

They saw Yu walking in in a delirious state, Chen Yang looked at Yu's huge dark circles and said in surprise: "Captain, why did you become like this, didn't you rest last night?" ”

Yu Qiang asked mentally, "Have you ever practiced throwing grenades?" ”

"I've practiced," Shen Mengfei proudly puffed up her chest, "I can vote far, the instructors praise me for my good throwing, and my Chen Yang is also very good." ”

"That's good, it's the fruit of my labor!" Yu tried his best to control his sleepiness and placed the flannel bag he was carrying on the table.

The two opened the cloth bag curiously and saw a row of "tin cans" lying there quietly.

Chen Yang looked at it: "What is this?" ”

"Grenades." Yu explained, "Handle it gently, you can't be hit hard, just shake it like a soda when you want to use it, and then throw it out." ”

"That's half a catty", Chen Yang weighed the grenade, "How powerful is it?" ”

Yu took out a piece of paper with a formula written on it and showed it to the two: "The explosion radius is about 20 meters, because I prepared it by hand, and the amount of explosives can't be accurate, but it won't be too wrong." ”

"Hey, that's a lot of power."

"The two with the red mark are more powerful." Feather pointed to the first and second "iron cans", "I added the flame crystal. ”

The couple exchanged glances. Chen Yang took two "red markers" and two ordinary grenades, and Shen Mengfei took the rest.

"Let's eat first."