[Congratulations to the host for obtaining a copy of the black powder formula, the black powder formula has been released on the mall.] 】

Cao Ze was stunned for a moment.

Black powder???

I ignored that.

Speaking of which, this thing is also in the category of thermal weapons......

Cao Ze vaguely remembered that the chemistry teacher seemed to have extended this thing to them when he was in school, and he demonstrated it in class later.

It's just that Cao Ze was busy playing chess with Zhou Gong at that time and didn't see the production process.

He was awakened by the explosion......

Later, the chemistry teacher seemed to be rubbed by the principal......

Cao Ze thinks it's not bad.

In this era of cold weapons, a simple thing like black powder can also be regarded as a big killer.

Anyway, he didn't plan to rebel and become the emperor, so it was okay to protect himself.

The only pity is that one copy of the formula for this thing is enough, and there is no need to buy it on the shelves of the mall.

While thinking, Cao Ze took the recipe out of the space.

After reading it, Cao Ze raised his eyebrows.

This recipe is a bit oddly proportioned.

It is said that black powder should be made in the ratio of one nitrate, two carbon and three sulfur, but this recipe is made with a decimal point.

And in addition to nitrate, carbon and sulfur, there is one more thing.

It is also a very common item.

If he hadn't read this recipe, he wouldn't have thought of adding it to black powder.

The recipe is written in great detail from the extraction and processing of raw materials to the subsequent operation steps of each step, which is like a hand-in-hand teaching.

And at the end, it is also noted that the overall performance of this formula is about 10% higher than that of the original.

Lenovo was a little better than the boxed lunch in later generations, and Cao Ze seemed to understand something.

"It's a pity that I can't make sugar, otherwise this power can be increased by a few points." Cao Ze muttered, and threw the formula back into the space with his backhand.

With the black powder recipe, self-defense items like bombs must be made some.

But not now.

I'm still in Cheng Yanjin's house.

Cao Ze dared to guarantee that if he played black powder under Cheng Biting Jin's nose, he was afraid that the formula would be placed in front of Li Shimin!

Cao Ze actually has no objection to using this thing for war to expand territory.

There's even a little bit to look forward to.

Traveling to Datang, wouldn't it be a pity not to do something?

Not much else.

The super shameless first country of the universe in the future world has to be arranged for him, right?!

There are also European and American sides, which have to be arranged!

For learning English at the beginning, Cao Ze had a lot of resentment in his heart......

But at this stage, Cao Ze didn't plan to take it out yet.

I, the so-called immortal, can do nothing but fool people with one hand in the air.

In the same way, you will eat and drink Lazar, and you will also get sick and hurt.

This kind of thing can't be hidden, and it's only a matter of time before it's revealed.

Besides, the bear that came back by himself on a horse yesterday must have been discovered by Li Shimin and Cheng Yanjin.

Now he and Li Shimin have a mutually beneficial relationship, but there is no guarantee that it will always be in the future.

If he gave this thing to Li Shimin, the ghost knows if a bunch of bombs would be thrown into the house when he went back to sleep......

Even if the odds of this happening are small, it's still possible, isn't it?

If you can't draw a life-saving means against black powder in the future, this thing can only be covered in your hands.

"Bang bang bang." There was a knock at the door.

"Immortal Master, it's time to eat." Cheng Chumo shouted outside the door.

Although Datang generally has a two-meal system, this is only for ordinary people.

With a big business like Cheng Bitingjin, it's not like you can eat it whenever you want to.

Lunch or self-heating box lunch......

Cheng Yanjin originally planned to make a big dinner to entertain Cao Ze.

However, after eating the natural box lunch, the food that I used to think was delicious was instantly unavailable.

He didn't even bring his favorite beef.

After all, Cao Ze's boxed lunch also has beef, and it is better than what he makes at home.

Although it is not the first time to eat it, the father and son have a great love for self-heating box lunches.

After a meal, the father and son were stunned and killed three or four boxes by themselves!

Cao Ze was dumbfounded!

One box is one and a half pounds......

These two guys have really fucking strong stomachs......

"Immortal Master, your Zu'an's food is so delicious!" Putting down the chopsticks, Cheng Biting Jin sighed with emotion: "Old Cheng, I feel that the first half of my life was simply in vain!" ”

"Uh-huh!" Cheng Chumo licked the rice grains and soup at the corner of his mouth, and nodded in agreement.

"Lu Guogong."

"Didn't you say it all, just call me Lao Cheng."

"That, Lao Cheng ......" Cao Ze said: "I want Chu Mo to accompany me around in the afternoon, I don't know if it's inconvenient?" ”

"Immortal Master, you're out of sight, aren't you?!" Cheng bit Jin Hao and said: "Didn't you say it before, in the future, Chu Mo will follow you to serve, just call me, don't be polite to me!" ”

After a few more polite words, Cao Ze left with Cheng Chumo.

"I don't know where the immortal master wants to go?" After getting into the carriage, Cheng Chumo asked curiously.

The carriage was requested by Cao Ze.

Riding a horse had already left a shadow on him before, and now the root of his thighs and buttocks are still hot and painful.

I have to hold and pinch it when I walk, I don't know if I think he has hemorrhoids......

"That's right." Cao Ze opened his mouth and said: "It's not appropriate to bother in the mansion all the time, so I'm going to buy a house first, and then buy some servants and daily necessities." ”

Cheng Chu silently ordered, and the carriage slowly headed towards the East Market.

East City.

"I've seen Xiao Guogong." The tooth man showed full enthusiasm for Cheng Chumo's arrival.

This is a big customer, and we have to serve it!

"I'm here to see the house." Cheng Chumo explained his meaning simply and concisely: "Remember, you want the best!" ”

"Okay!" The tooth man answered, and led the two to a shop in the East Market.

"Little grandfather, all the houses for sale in Chang'an City are here." The shopkeeper took out a document and said with a spring breeze on his face.

"Childe." Cheng Chumo handed over the information to Cao Ze.

This is what Cao Ze explained before, you can't call him an immortal master outside.

Before, I was forced to pretend to be a magic stick, but it's better to keep a low profile.

Cao Ze glanced at it.

As the capital of the Tang Dynasty, the houses in Chang'an City are basically owned by the owner.

There are now only three copies for sale.

Two two-in, the price is around a thousand times.

A four-entry is worth three thousand five.

There was nothing to consider, Cao Ze decisively chose the four-in.

As a time-traveler in later generations, Cao Ze is full of resentment about buying a house......

Now that I'm not short of money, I naturally have to choose the best!

"Childe wants to buy this?" Cheng Chu silently saw that Cao Ze had made a decision, and asked excitedly.

"Is there something wrong with this house?" Cao Ze gave him a strange look.

"The house is naturally fine!" Cheng Chumo said happily: "This house is diagonally opposite the door of my house, and we will be neighbors in the future!" ”

Originally, I heard that Cao Ze was going to buy a house and move, but Cheng Chumo was still a little depressed.

It's so easy to hug a fairy's thigh, and run away before it can be hot.

Now it's okay, you can hug your thighs every day in the future!

Cao Ze: ......

It's a fucking coincidence......

But it doesn't seem to be bad.

Being a neighbor with Cheng Yanjin is equivalent to living in a safe zone.