Yan Rushan put his hands on his hips, stared at the door in anger, gritted his teeth and went downstairs.

Inside the house, Goudan brought in the food, "Master, it's time for you to eat. We have your favorite lobsters and oysters."

"It will be done soon." Yuxiu didn't even look up as she used her mental power to complete the last component. Then she withdrew her mental power, wiped the sweat from her forehead, and her head throbbed with pain. "Goudan, this is too difficult without the ability recovery potion."

Goudan said, "You can research it."

"How easy is that! The repair fluid alone took me two or three years, and I don't know when the supernatural recovery potion will be available. The key is, I've only participated in the experiments with the repair fluid, not the supernatural recovery potion. I don't even know the formula, so it'll take even longer." This world has never heard of other supernatural beings, so what good would it do if they did? Would she drink it alone?

Once the superpowers are used up, they will recover in a few days, so there is no need to use them. In the interstellar world, those who go out to fight are the ones who use superpower recovery potions the most.

"Besides, I don't use my superpowers very often. This little superpower can't be upgraded. Level five is the best it can be." There was no need to research recovery potions. "Fortunately, the parts I need for the printer are ready. I'll eat first."

Yuxiu stood up and stretched her muscles and waist, then sat down on the chair in front of the tray.

"Master, you eat first, I'll assemble it, okay?" Goudan scanned the parts on the table. "Such a simple printer, it's no problem for me to assemble it."

Zhong Yuxiu: “…” It is a bit simple, and it certainly cannot be compared with the high technology in the interstellar space.

"Okay, you assemble it." After handing it over to Goudan, Yuxiu left it alone; she buried her head in eating shrimps, peeling oysters, and finishing the meat and vegetables with rice and buns, then collapsed comfortably in the chair.

"Master, the printer is assembled. Would you like to check it?"

Yuxiu looked up and saw a printer exactly like the one on her drawing on the table in front of Goudan. "No need to look, just connect it to the computer and try it."

"Master, there is no suitable paper."

"I just cut up some white paper and use it as is." He pointed to the drawer.

Goudan understood, picked up the machine and placed it next to the computer, occupying a small corner of the computer desk; it was only because the computer desk was long and wide, otherwise it might seem crowded.

Plug in the connection cable and turn on the printer; the printer makes a sound of wheels turning, and is connected to the computer in just a moment.

Goudan took the paper from the drawer and cut it. He didn't need to measure the size, he just used his measuring skills freely. The cut paper fit perfectly with the inlet and outlet of the printer. After putting it in, he operated it with a computer, and the printer ran smoothly, and the paper was sent out smoothly after entering.

Although there is no ink, the tiny dots on the paper cannot be faked.

"Master, it worked and can be used; unfortunately, the printer is out of ink, and the paper is as clean as new."

Zhong Yuxiu walked forward, took a look, nodded slightly, stretched lazily, and sighed, "Okay, I can take a break now." Her eyes were flushed with sleepiness.

Goudan's mechanical voice sounded again, "Master, go back and rest. Goudan will clean up the mess."

"No need to rest for now, I still have to study the dry ink."

Goudan: “….”

"Master, you need to rest for a while. Yan Rushan will come in and urge you later."

It is unclear whether this was out of concern for Yuxiu or to flatter Yan Rushan.

Zhong Yuxiu glanced at it without saying anything; she rummaged through a pile of unused materials but couldn't find even a piece of dry ink, and she felt a little disappointed.

"Master, please take a rest first and get enough energy before talking about Mo's matter." Goudan stepped forward and put those things back together.

"This is the only way." His thoughts raced, and he returned to the table, fetching paper and pen to write down the dry ink needed; the dry ink installed in the printer should be delicate, soft, and rich in color.

Holding two pieces of paper, Zhong Yuxiu came out of the laboratory. Yan Rushan was also entering the room after taking a shower. She looked at the time and it was already half past eight.

I didn't waste any time assembling the machine, but I still worked for so long; if I had to assemble it too quickly, I'm afraid I wouldn't be able to finish it before ten o'clock, right?

Yan Rushan walked towards her, wiping his hair. The girl, now a woman and a mother, had less youthful masculinity and more gentle charm between her brows. He brushed the black hair from her ears and asked softly, "Are you done with your work?"

"Well, this is for you." She stuffed two pieces of paper into his hand and turned back to get some clothes from the closet to change into.

Yan Rushan finished reading the two pieces of paper and was puzzled for a moment. When she turned around, he asked, "What are you going to do with these?"

"Paper, white paper for writing, and ink, but it's dry ink; you can use it to open a stationery factory to produce pencils, pens, dry ink, A4 paper, and stationery. These two things are what I urgently need, so send me a copy when you're done." Zhong Yuxiu said.

"Open a stationery factory? Why are you thinking of this?"

Zhong Yuxiu rolled her eyes at him. "My latest printer research requires these. A4 paper is essential, preferably three times thicker than the white paper we have now. The dry ink needs to be powdered and bottled."

"Printer? Can I go and take a look?" Yan Rushan became interested.

"It's in there, you go by yourself, I'll take a shower first." After saying that, he quickly walked out of the bedroom.

Yan Rushan walked quickly into the laboratory holding two pieces of white paper with the formula and manufacturing steps written on them; Goudan heard the noise, looked back, and then turned back to continue tidying up the messy things in the room.

"Goudan, where is the printer?"

Goudan glanced at him and didn't intend to pay any attention to him.

Yan Rushan was not surprised and worked hard to find something in an iron box on the computer desk. The laboratory had never had such a thing before, which meant that this was the latest printer developed by Yuxiu.

He quickly stepped forward, extended his hand, and traced his fingertips along the body of the computer. He then picked up the white paper on the computer desk. It was barely thick enough for writing, no wonder Yuxiu had asked him to make it three times thicker. When his eyes touched the faint mark on it, which was clearly transparent, he saw a business opportunity.

Once the printer is released, it will definitely trigger a buying frenzy; Yuxiu did not give him the printer, she must have her own plans, however, white paper and dry ink can only be used with the printer, so the business will only continue.

Printers may be unsalable, but A4 paper and dry ink are consumables and will definitely not be unsalable; by seizing the market first, even if someone reveals the formula of paper and dry ink in the future, he will still have a dominant position.

Thinking of this, Yan Rushan folded the things as if they were treasures, went back to the bedroom, found the coat he would wear the next day from the closet, and stuffed it into the inside pocket of the coat.

When Zhong Yuxiu came out of the shower, she saw him leaning back on the bed, lost in thought. She lifted the covers and lay down, then raised her eyelids and asked, "What are you thinking about? You're just sitting here in a daze after I left?"

Yan Rushan pulled her into his arms, letting her lean against his chest. "Thank you, my dear wife. We have a monopoly on these two things at the beginning, and we can cooperate with the higher-ups. By the time someone figures it out in the future, our factory will have already secured the upper hand."

"That's it!"

Yuxiu didn't mind. "I have blueprints for several electrical appliances. Take them with you. Have them developed as soon as possible so we can use them at home."