Zhou Heng was stunned. He didn't expect that after so many days, he could still remember it. However, after saying this, Zhou Heng's face felt a little embarrassed. Why did he seem to be the murderer?

Zhou Heng smiled at him and said:

"I'm here this time and want to ask if you can make such hollow needles here?"

"Hollow needle?"

The man was stunned by one sentence. He quickly threw the red iron block in his hand back into the stove, took off his heavy gloves, applied a handful of them on the apron, and turned back to the shop.

Zhou Heng flew over his head. What does this mean?

Have yourself been left here, have you done it or never done it? Have you heard of it?

Just as Zhou Heng was thinking about it, the big man came back, holding something in his hand, and Zhou Heng took it and took it to take a look.

This is something like a triangular needle, with complicated patterns wrapped around the tail, but the tip is a triangle shape and an oval hole on it. Although the needle tube is a bit thicker, it looks like it is hollow.

Zhou Heng was excited. If he could do this, it means he could not be bound by the first aid kit and he could configure medicines at will.

Thinking of the syringe in the car, Zhou Heng quickly returned the needle to the big man.

"This is very well-made, but what I need is thinner than this one. I'll bring the real thing to show you?"

When the big man heard this, he nodded quickly.

"It would be even better if there was a physical object."

"Boss Xue brought my box."

Boss Xue didn't say anything, turned around and went to the car, took the box down and handed it to Zhou Heng, opening a gap. Zhou Heng fumbled for a moment and found a metal needle.

This is a lumbar puncture needle. The only stainless steel needle in the first aid kit is slightly longer than the needle on an ordinary syringe. However, if it is urgently injected intravenously, this needle is quite useful, even if it is punctured and drip, it is very good.

This needle is twelve centimeters long. If this needle can be made, it will be fine even if it is shorter.

Before Zhou Heng could speak, the man grabbed the needle and picked it up and looked at it. His face was full of shock. He gently stroked the tip of the needle with his fingers, and did not dare to touch it hard. He just pressed the square interface of the needle with his nails.

"Where did you get it from? It's well-made and has excellent materials. It has no impurities at all and is extremely tough. This is not ordinary iron, it should be stainless steel!"

After saying the last two words, the big man covered his mouth, grabbed Zhou Heng's hand, and retreated directly into the iron shop.

Boss Xue was a little stunned when he saw it. He rushed up in two steps and grabbed the big man's collar. But the big man shook his arms and broke free. Seeing Boss Xue wanted to take action, Zhou Heng quickly said he would stop him.

"Don't panic, this big brother has no malice."

The big man nodded and looked around vigilantly.

"This stainless steel is forbidden to be built on the beam. Where did you get this needle?"

Zhou Hengxin relaxed and guessed that it might be because of this. The puncture needle is stainless steel. He didn't want such a good material, as long as it can be made into a hollow needle.

"My grandfather left it. I remember he seemed to say that this thing seemed to be brought by overseas merchants. There was only one in total. I didn't want this material. As long as it could be made into this form, it would be a little thicker and shorter."

"Are you a doctor?"

Boss Xue stretched out his thumb and gestured at the shop of Xinglin Hospital diagonally opposite.

"See, Xinglin Medical Center is his now, and we will open soon."

The big man nodded, "Please hold the needle and leave the drawings for me to study. I don't know if I can make it. After all, pig iron is not tough enough, so I'm also trying to forge more elastic objects."

Zhou Heng pulled out the drawings behind him. In addition to the hollow needle, several drawings were also unfolded. Inside were hooks, dilators, small saws, hemostasis pincers, and a cauterization hemostasis device for ophthalmology, which was spread in front of the big man.

"The remaining few devices are easier, can you see if you can make them?"

Looking at the strange-shaped object, the man's mind was a little frozen. He grabbed the drawings of the burning hemostatic device and looked at it repeatedly.

"This is not marked, is there any difference in the material?"

Not to mention that he really asked the point, "Yes, the handle should have patterns, so it doesn't need to be beautiful and easy to grasp. The ball in the front section should be made of copper, and the part exposed at the top should be tilted and should not be horizontal to the ball, and the top should be very smooth and there should be no burrs."

The big man kept scratching the ground with a charcoal pen. Although he couldn't understand the symbols he marked, he seemed to understand.

"As for the quantity, except for this hemostasis device, the rest are made four pieces each. As for the hollow needle, you can make twenty pieces first."

Boss Xue was a little anxious. Zhou Heng was all right, just like the same thing, never asking about the price, which was really frustrating.

"How much silver do these require?"

The big man looked at the drawings and said, "These don't use much iron, they are just finer. You have to pay more, not counting the hollow needle, just give them three taels of silver."

Zhou Heng was stunned and glanced at Boss Xue, the big man looked alert.

"What does it mean to be expensive? I didn't ask for you much money. As for these twenty hollow needles, you need at least five taels of silver outside. Of course, you will pay if you are satisfied with the goods."

As if he was afraid that Zhou Heng's business would run away, he quickly rolled up the drawings.

Zhou Heng's face trembled as he watched his movements. He didn't understand anything. Before Zhou Heng could say anything, Boss Xue stopped doing it.

"How come you are like this? Return the drawings to me? Why did you hide the drawings before you even agreed on the price?"

Zhou Heng stopped his movements, and the man directly stuffed the drawings into his arms.

"This young master still doesn't know your surname?"

"My surname is Zhou, and my name is Heng. If you have any questions, you can go to the clinic to find me."

"Well, then good Mr. Zhou, I will send it to you for a look. If you need to make changes or have any unsatisfactory places, you can come to me. Let's take three days."

Zhou Heng thought about it. He really didn't know much about steelmaking for a medical student. He just remembered that he had read a related introduction to how to reduce impurities in pig iron and cultivate it into mature iron. He thought about it for a while and said.

"What you use is pig iron, just burn it blindly, and there are still many impurities. If you install a bellows next to this stove to replenish the air, the fire will be stronger and the temperature will increase accordingly, and there will be a lot less impurities in pig iron."

"What is a bellows?"

Zhou Heng grabbed the charcoal pen beside the man and drew a sketch on the ground. An iron rack was connected to the stove, with a wooden bellows on it, with an opening connected to the side of the stove.

Zhou Hengshou gestured at the handle outside the bellows and said, "If you open the bellows in this way, the small door at the handle will be opened, and the air will enter the inside of the bellows. When the bellows are pushed, the small door behind will be opened, the front will be closed automatically, and the air will blow in."

The man kept studying Zhou Heng's bellows map. Although he had just a few strokes, he had already understood the meaning.

This thing is very crude, but it definitely solves the problem. He has a sheepskin bag, which is occasionally used to blow the air, but the thing is done after blowing it. This one can be supplemented all the time, which is so practical.

"Thank you, Mr. Zhou, for your advice. I am a rough man and I won't say anything. Anyway, I will carefully tidy up what you want. I'll try the hollow needle. It's also feasible to have this bellows here."

Zhou Heng did not stop for more, and the two went back to the backyard of the clinic.

As soon as we entered the door, many workers were working in the room. In the house on the edge, there were already distillation equipment, large tanks for fermentation, iron pipes, steamers, collection buckets and other equipment, all of which were connected. Not to mention that they were really a little like a small workshop.

In fact, Liu Xiuer's surgery cannot use so much alcohol.

However, after passing this village, there is no chance to hack Liu Renli.

It was too nervous to decorate and manufacture the workshop for one hundred taels until it started to operate. These glass and surgical instruments cost 18 taels of precious things.

Zhou Heng did not stop and went straight to the second floor. Unexpectedly, all the rooms on the second floor were completed. Dr. Ma took Desheng and Achang to sort them out. When he saw Zhou Heng, he quickly bowed.

"Young Master Zhou is back."
Chapter completed!