Therefore, it is better not to use explosives, at least not until she establishes a safe haven, after all, explosives are one of the hole cards for self-preservation.

However, the iron-smelting technology of Tai Kai Prefecture is not competitive, and without explosives, it is bound to be impossible to dig mines, and without gold, it is impossible to solve the debt problem, let alone build a dream town.

To sum up, Li Yewu could only take the risk of putting explosives in advance.

According to the novel, Xiao Jiuxi did not return to the fiefdom until he died, and he was optimistic that as long as he was careful with some explosives and concealed it better, Xiao Jiuxi should not know.

As long as he doesn't know, the emperor will still be in chaos, and whoever should die will die.

As long as it doesn't affect the direction of the story, she should have no problem blowing up the mountain here, right?

And seriously, robbers and bandits are rampant here, and she, a weak woman who fights like a scumbag, really needs something to defend herself.

If nothing else, carrying a few grenades with you is much safer than a servant of the house.

After all, you can only be a princess by relying on others, and you can be a queen by yourself.

All in all, Li Yewu strengthened his determination to pour explosives.

When it comes to making earth explosives, how can you not be a good infrastructure engineer?

It is said that "one nitrate, two carbon and three sulfur" is the secret recipe for the preparation of explosives, in fact, there are many secret recipes for soil explosives, in addition to the above there are three other most commonly used.

First, nitrate, sawdust, diesel; second, nitrate, wheat sugar, sulfur; The third is nitrate, sawdust, and salt.

It can be seen from this that the core of the earth explosive is in the nitrate.

Speaking of nitrate, it can not only be used as explosives, but also can be used to process animal skins and animal hair for a longer time, and can even be used as fertilizer to improve fertility, soy milk to make tofu and so on.

In ancient times, there were special craftsmen who made a living by making and selling nitrate, and they were nitratemakers.

Of course, this is the ancient times of China, and the memory of the original owner knows that there is no such profession here.

At present, as long as Li Yewu solves the problem of nitrate, the rest will be easy to handle.

The ancients generally boiled it in a cave, because the soil in the cave is rich in sulfate and nitrate, and the nitrate content will be greatly increased when the nitrate is boiled.

However, there are too many bandits around the city, and it is obviously unrealistic to rush to the caves on the outskirts.

Li Yewu hit the idea to the cave in Xiao Jiuxi's back garden.

……

Speaking of which, there is a rockery in the back garden of the palace, there is a culvert in the rockery, this culvert is amazing, there is a pair of mandarin duck ponds in it, one left and one right and one cold and one cold are far away, it can be described as a miracle of nature, a wonderful work.

This is also Xiao Jiuxi's favorite place, soaking in hot springs in winter and cold springs in summer, not to mention enjoying more.

At this time, Li Yewu, who had returned home to eat and drink, carried a shovel and found Xiao Jiuxi's most precious place.

She was accompanied by Zicui.

Seeing that Li Yewu was about to dig a pit in the culvert without saying a word, Zicui was very worried.

"Little lady, do you really want to do this? Will the master be unhappy? ”

"Don't worry, I'm just digging a pit in the open space here, and I'm not filling his hot springs, so it's not in the way." Li Yewu replied very simply.

"But...... If you want to go straight in, why bother digging another pool. ”

Of course, the most important thing is that although the master is easy-going, he is also nitpicky, he pays attention to the ultimate symmetry in everything he does, don't you find that the size and position of the pool here are very symmetrical?

If the harmony and symmetry here are destroyed, I am afraid that the master will be like thunder.

Li Yewu raised his eyebrows: "Are you digging for fun?" If it weren't for the sake of paying him off, would I have had to work so hard?

I'm digging now, and I'll be able to pay back the money in a month, if I don't dig it, Xiao Jiuxi won't even be able to touch it in a month, do you say dig or not? ”

"Huh?" Zicui's eyes widened, dare to love the little lady or to solve the master's affairs?

"I'm sorry, little lady, I'm too stupid to see your good intentions, now that I know, I will definitely do my best to help you dig a pit together."

Now the whole house is working hard to repay the debts of the master, and Zicui, as the most heartfelt little girl, of course can't hold back.

Li Yewu couldn't help but laugh when she looked at the little girl's innocent and ignorant appearance.

It is said that the ancients had many eyes, but it seems that this is not necessarily the case.

Or rather, it's just that the servants in Xiao Jiuxi's mansion are different, everyone is very simple, and everyone is a talent.

After persuading Zicui, Li Yewu began to roll up her sleeves and dig a pit.

Although Zicui didn't know what the inevitable connection between digging a pit here was with paying off the debt to her master, the old housekeeper said that the whole house must fully cooperate with the little lady, so she just cooperated.

Soon the two dug two large pits, the second of which was much deeper than the first.

Then Li Yewu told Zicui to go to the kitchen straw, the more the better.

Zicui nodded without hesitation and ran away, and when she came back with a large stack of straw, the little lady was busy in the second pit.

Zicui leaned over to take a look, and saw that the little lady was digging a cave, and her clothes were full of mud and embarrassment.

However, the little lady didn't care, she dredged the two pits before climbing up unhurriedly.

Seeing that Zicui was back, he threw a bright smile at her: "Back?" Great work! ”

Zicui was stunned, this was the first time that a master had expressed kindness to her, and that feeling was like her sister......

Zicui pursed her lips and smiled a little embarrassedly, and shook her head silently: "It's not hard, Zicui should do it." ”

"Okay, let's move on!"

Li Yewu nodded at her, picked up the shovel again and filled the first pit with straw, a layer of straw and a layer of soil, tamping back and forth and repeating.

Zicui understood and followed to help.

About half an hour later, the big hole that the two of them had dug with great difficulty was filled back in.

After that, Li Yewu took a wooden barrel and began to pour water into the filled pit layer by layer, watering it four or five times, making sure that the soil layer was all drenched, and then he was ready to go back to the house.

"Little lady, what are we going to do?"

At this time, Zicui was even more confused by the second monk.

At first, I thought that Mrs. was going to dig a pit and soak in the hot spring, and then I thought that Mrs. was going to be an organ, but it turned out that Mrs. was just trying to bury straw for a long time?

Li Yewu smiled mysteriously: "You'll know in the future, hurry up and rest, and we'll come back when we're young." ”

"Do you want to come over when the time comes?"

Zicui's curiosity was completely full, but Li Yewu made up her mind to remain mysterious, and Zicui could only give up.

But because she was too curious, Zicui didn't rest for a moment, and when she arrived, she ran to call Li Yewu like a bird.

The master and servant set off for the backyard again with lanterns.

Although the palace is surrounded by four walls, the framework here is still there, the garden corridor is readily available, and there is still a certain distance between the two from the bedroom to the cave in the back mountain.

Walking in the corridor with a lantern, you can still hear the insects and birds chirping around, which is quite a sense of silence and depth.

Although the moonlit night was beautiful, to be honest, if she didn't have Zicui by her side, she would really feel scared.