The Yang sisters had just put on their clothes and were about to go out when they heard someone knocking outside the door.

The Yang sisters were shocked.

"who?"

Li Junyu's voice came from outside the door.

"It's me! Brother Xiao asked me to ask if you two sleep coldly at night and whether you want to add a quilt."

In fact, Li Junyu deliberately found an excuse to speak out because she found out that the Yang sisters were about to leave, so that the Yang sisters knew that they could not leave at all.

Xiao Zhengyang made Li Junyu feel embarrassed to remind the Yang sisters in this way that he did not want to hurt their face.

When Yang Qin heard Li Junyu talking outside the door, she knew that she would not be able to leave tonight.

"No, we don't sleep cold."

Yang Qin said, afraid that Li Junyu would come in to check, so she quickly pulled her sister to hide in the quilt.

Even I didn't have time to take off my clothes.

The Yang sisters stayed in Luojiazhuang honestly for one night. After dinner the next day, Xiao Zhengyang took them to a small courtyard.

This courtyard is a newly built research room by Xiao Zhengyang in Luojiazhuang, which specializes in the production of springs.

But Xiao Zhengyang tried it here many times, but still did not create a spring.

The main reason is that the iron they bought is too hard and lacks elasticity.

Therefore, how to refine high-tough steel becomes the key.

As long as you make high-tough steel, it will be natural to make springs.

Once the spring can be mass-produced, light machine guns like Xiao Zhengyang can be mass-produced.

By then, Xiao Zhengyang's technology in light weapons would be basically mature.

Although I dare not say that I am invincible in the world, it is basically easy to deal with Shi Wenxuan.

However, due to the technological level of this era, Xiao Zhengyang has been studying for many days but has never been able to make high-toughness steel that meets the requirements.

If Xiao Zhengyang spent all his energy on this, Xiao Zhengyang believed that he would definitely be able to refine this high-toughness steel in another month or two.

But Xiao Zhengyang had to do too many things. Now Shi Wenxuan has already made bullets and started training rifle soldiers.

If Xiao Zhengyang focused all his energy on the high-toughness steel, it is estimated that before Xiao Zhengyang created the spring, Shi Wenxuan had already arrived.

By then, there was only one result waiting for them - massacre! Although Wei Shuliang was proficient in firearm manufacturing, he was not good at steelmaking.

Just now, when Xiao Zhengyang was checking the gun made by Yangmei, he found that a part uses much tougher steel than they used.

Xiao Zhengyang once sent people to two big cities around Qingyang and Pingyao to purchase, but he did not find such high-strength steel.

This is also the reason why Xiao Zhengyang repeatedly wins over the Yang sisters.

At this time, Xiao Zhengyang led the Yang sisters into the courtyard and pointed at the surroundings.

"This is the laboratory where you will make springs in the future.

If you are missing something, please mention it.

I will definitely try my best to satisfy you."

Xiao Zhengyang said, and took the Yang sisters to visit the courtyard again.

In addition to some simple processing tools, there is also a small stove in the yard.

Several workers were shooting irons by the fireplace.

This is actually a blacksmith shop. At most, Xiao Zhengyang has added several more convenient gadgets here.

Such a place cannot be regarded as a laboratory, but in this era, it is no longer easy to have such a place.

Yang Qin looked at the courtyard with her hands behind her back, turned to Xiao Zhengyang, with a little arrogance on her face.

“It’s not impossible to ask us to make that kind of spring for you.

Li Junyu next to him frowned.

"But even if they make such springs.

But we can't learn this technique. Once they leave, won't we still be able to build this new gun?

Moreover, once they left, this gun technology would likely flow into Shi Wenxuan's hands.
Chapter completed!