Late at night, when everyone is quiet, military doctor Tian Bu is eating grass.

To be precise, eat Artemisia annua.

Traditional Chinese medicine has a simple method of testing the properties of medicines, which is to eat a little and taste it.

From Shen Nong to Tian Bu, they are inherited from the same origin.

Tian Bu ate Artemisia annua, and even kneaded some Artemisia annua juice to drink. His mouth was full of green annua and his stomach felt uncomfortable.

Tian Bu was very research-minded and carefully experienced the changes in his body after eating Artemisia annua.

It seems... not much has changed, except that my stomach feels uncomfortable.

I have eaten a lot of artemisia annua, but this is not the end.

Tian Bu also made soap according to the method taught by Li Mengxi.

Boil the butter until it becomes oily and serve it alone.

The plant ash simmers for a while, boils, and then cools down.

Then pour in the butter.

Stir again.

Tian Bu saw that there was a layer of white greasy stuff in the jar containing plant ash water.

Tian Bu was so curious that he grabbed some and stuffed it into his mouth to taste.

The smell of soap is naturally unpleasant.

Tian Bu frowned and chewed for a while. The soap bubbled up and his mouth was full of foam.

"Pfft--" spit out the soap in one gulp.

Lots of bubbles.

Tian Bu has become a fish and can spit bubbles.

This isn't the end yet.

Tian Bu, who was full of curiosity about soap, took a spoon and filled half a spoonful of soapy water, endured nausea, and drank it all in one go.

Then, Tian Bu took matters into his own hands.

After drinking the soapy water into my stomach, it felt okay at first, but as time passed, my stomach began to churn and I felt nauseated.

Finally, Tian Bu couldn't bear it anymore, bent over and vomited out.

This vomiting makes me vomit out bile.

Soap is extremely powerful for washing things, so how about using soap for gastric lavage?

Soapy water can induce vomiting.

Better than dung water, Tian Bu thought.

The fecal water is dirty and disgusting, but the soapy water military advisor said it is very clean.

From now on, when children are fed and housed with life-threatening food, there is no need to feed them feces, just soapy water.

One night passed.

September 13th.

It's just dawn in the morning.

Li Mengxi woke up a little early.

He got dressed, wandered around for a while, and then came to the central military tent.

Liu Bei and Guan Yu also got up early, and the infantry armor was finally formed.

Different from the smaller children's armor made by Li Mengxi for his younger brother, the armor made by Guan Yu and Liu Bei is a real combat armor made according to Guan Yu's stature.

When Li Mengxi arrived, Guan Yu and Liu Bei were happily tying their armor together and holding a large scale, preparing to weigh.

Looking at the way Guan Yu lifts his nose with force, you can tell that this set of armor is definitely not light.

"How many pounds?" Li Mengxi asked.

Guan Yu put down the scale hook, held the weight in his hand, and glanced at the crosshair on the scale, "Seventy-five pounds."

"Ah?" Li Mengxi was shocked, why was it so heavy?

The foot armor weighs more than fifty kilograms, so why does this set weigh more than seventy kilograms?

However, looking at Guan Yu's tall and sturdy stature, Li Mengxi understood.

A guy as fierce as Guan Yu would stand out among the ranks of the Song Dynasty Burenjia, who were generally 1.8 meters tall.

Guan Yu was taller, so the armor that fit Guan Yu's body was naturally heavier.

In addition, when Guan Yu and Liu Bei were weaving armor for the first time, they must have been afraid that the armor pieces would be missing or something, so they tried to stack the armor pieces together.

Therefore, this set of walking armor must be overweight.

Take advantage of the morning time to test fire on foot.

The military camp is full of people, so it's hard to let the test go.

When they arrived outside the camp, they hung the armor and breastplate on the wooden stakes.

Standing still at thirty steps, Guan Yu held a strong bow in his hand, pinched the goose feather arrow, stretched his arms hard, and with a crunch, the bow stretched to the full moon in one stroke.

When he released his bow and arrow, the bow string vibrated loudly and the arrow flew out with a whoosh.

The arrow was so fast that it hit the breastplate of the infantryman thirty steps away in an instant.

Li Mengxi clearly saw that after the arrow flew far away, it hit the breastplate and was bounced away.

This is the first arrow.

Guan Yu pulled out the second arrow beside the arrow, and drew his bow again.

Whoosh!

The second arrow flew out, and after hitting the armor, the arrow bounced away again.

Then came the third arrow, the fourth arrow... until the tenth arrow.

At a distance of thirty steps, the strong bow fired ten arrows, six of which were bounced on the spot. Two arrows hit the breastplate and fell to the ground. One arrow shaft was broken, but only one was nailed to the breastplate successfully.

No matter what, the test results are already extremely satisfactory.

"Let's go and have a look." Guan Yu raised his bow and stroked his beard, and looked at each other with Liu Bei and Li Mengxi.

"Let's go!" Liu Bei said with a smile on his face.

This man is heavily armored, and his defense power is truly astonishing.

As they got closer, the three of them discovered why there was an arrow nailed to the armor.

The arrow happened to hit the hole in the armor plate, and was inserted crookedly there.

The hole in the nail plate was pierced by the arrow and cracked a little, and the arrowhead was scratched by the nail plate and the blades on both sides were chipped.

This is the only arrow nailed to the infantry's armor, causing limited damage to the armor.

Guan Yu's bow was already a hard bow with great draw power. At a distance of thirty steps, all ten arrows hit the target, leaving only some dents in the breastplate.

Thirty steps, defense against two stone strong bows, and foot armor defense success rate reached close to 100%.

Liu Bei and Guan Yu praised the defensive power of Bu Renjia.

Li Mengxi used his fingers to pound the nail hole pierced by the arrow, and the nail hole was cracked.

Even if an arrow shoots into the hole, it will not hurt the person who pierced the armor, because there is overlap between the armor plates, and if it is shot through the hole of the first armor plate, it will hit the second armor plate.

The defensive power of the armor-piercing pieces of the Han Dynasty seemed a bit weak, Li Mengxi thought thoughtfully.

He thought of the Western Xia cold-forged Hao Zijia, who was contemporary with Bu Renjia.

To be precise, this wart nail does not refer to the style of the nail, but the processing technology of the nail piece.

To put it simply, when cold forging monkey armor, take a thicker piece of armor, clamp one end with pliers, place it on the iron felt, and then beat it continuously.

Take a thick piece of nail and make it very thin, more than half the thickness.

Because of the cold forging process, the middle of the nail plate is very thin, and the places where the pliers pinch at both ends are not hit, so it looks like two warts.

That’s why it’s called Haozijia.

By smashing the iron more densely, the strength of the armor is effectively increased, making the armor more indestructible.

Just making the iron sheet thinner can increase a lot of strength and toughness. This is easy to understand - making a gun requires seamless gangguan, why can't ordinary steel pipes?

This chapter is not over yet, please click on the next page to continue reading! Ordinary steel pipes have bubbles, sand voids, are not dense enough, and are not strong enough.

In the same way, dense steel is much stronger than non-densified steel.

This is the first point. From a macro perspective, repeated cold forging makes the nail plate very dense, reducing the tiny bubbles and pores in the nail plate, and increasing the strength of the nail plate.

The second point is that from a microscopic perspective, after cold forging and beating the nail plate multiple times, a denser crystal structure is formed between the iron molecules.
To be continued...