Zhao Zheng originally thought that he would stay at Old Doctor Liu's house for a while, but before he could enter the door, he was dragged by Zhao Ji and hurriedly walked home. Fortunately, the door was wide open, and Zhao Zheng was relieved when he saw that Xia Wuqi was giving medicine to Old Doctor Liu

"Mother, what's wrong? Isn't it who bullied you again! ”

Looking at Zhao Ji with tears in her eyes, Zhao Zheng frowned and said with great concern.

Zhao Ji didn't say anything when she heard this, shook her head slightly, picked up Zhao Zheng and sped up her pace home.

The wind and rain were like a note, and Zhao Ji's slender body was like a small boat with a broken anchor swaying back and forth in the storm. Zhao Zheng lay on Zhao Ji's shoulder, feeling that the originally warm body was gradually cold like frost, and his nose was sore, so he also cried. Wind and rain, Zhao Zheng couldn't tell whether it was rain or tears on his face at this time, he only felt that the road was extremely long and soft-hearted. More than 20 minutes later, Zhao Ji hugged Zhao Zhengcai to the front of the house.

"Squeak"

With the sound of wooden rafters rubbing, the dilapidated door that was originally closed was opened, and Zhao Ji immediately carried Zhao Zheng into the house. With a "clang", the door was "tightly" closed again.

"Zheng'er must be hungry, my mother is cooking!"

Putting Zhao Zheng down, Zhao Ji wiped her face casually, and then got busy. Zhao Zheng was surprised now, he never expected that the two young men sent by Shen Lang would be so reliable. Looking at the flat and dry ground in the house, Zhao Zheng was stunned.

"I'll go, where did they get the dry soil on a rainy day? Hiss...... And this old method ......," Zhao Zheng couldn't help but exclaim.

Just when Zhao Zheng was amazed by the two black-clothed men in his heart, Zhao Ji, who was about to cook on the fire, was suddenly stunned, and then looked at Zhao Zheng with red eyes.

"Zheng'er ......"

Zhao Ji choked up and called Zhao Zheng.

"Huh?"

Zhao Zheng saw Zhao Ji looking at him with tears in her eyes, and suddenly felt inexplicable, "Hiss...... Didn't you cry enough just now and bring it back? ”

"What's wrong, mother?" Zhao Zheng asked in a low voice.

Zhao Ji shook a good piece of dry firewood in front of Zhao Zheng's eyes and asked, "Zheng'er, tell me the truth, where did this bundle of firewood come from?" ”

If Zhao Ji didn't say it, Zhao Zheng really didn't pay attention, next to the earthen stove, a bundle of good dry firewood was stacked so neatly.

"This ......"

Zhao Zheng looked at the dry firewood with a confused expression, "Hiss...... I'll go, it can't be those two boys who did it, right? No way! This...... This fucking fucks me! ”

Since the absence of the stranger, Zhao Ji's family has never burned such good firewood, and now looking at this pile of firewood, Zhao Zheng didn't know how to explain it for a while.

"This ...... This ......"

After "this" for a long time, Zhao Zheng remembered what Zhao Ji had said to him before, and then his eyes turned to his heart: "I don't know, but when I woke up, I found that there were more bundles of firewood at home." I was still puzzled, thinking that my mother had brought it from my grandfather's house. ”

Zhao Zheng's eyes were not red and his heart was not beating when he lied, Zhao Ji frowned when she heard this, and naturally thought about the mysterious person who protected her mother and son.

"It looks like our mother and son are finally coming to the end......"

Zhao Ji muttered, and the hand that was originally holding the firewood was unconsciously white.

Seeing Zhao Ji like this, Zhao Zheng couldn't help but sigh in his heart: "Alas...... It's not easy for anyone! ”

Not to mention that Zhao Ji held a firewood for a long time, and when the two of them finished eating, it was already noon. Although it was noon, there was no sunshine, and some were rainy and windy.

Because she was busy all night, Zhao Ji didn't even have time to clean up the dishes and chopsticks, so she couldn't wait to lie on the kang and fall asleep. The quilt was gently placed on Zhao Ji's body, and Zhao Zheng immediately began to think about how to make gunpowder.

Gunpowder is one of the four great inventions of ancient China, and its impact on the world is extensive and far-reaching. Zhao Zheng was the most soldier, and he was very familiar with the use and production of gunpowder. However, now that he is asked to make gunpowder, it makes it difficult for him to scratch his ears and cheeks.

"I'll ...... Let's not talk about TNT and plastic explosives, Lao Tzu can't even make the simplest black gunpowder now! One nitrate, two sulfonate, three charcoal...... It's easy to say! But where do I get potassium nitrate and sulfur? Depend on! ”

Zhao Zheng was now inside the house, scanning every corner of the room through the extremely dim light inside the room. It's been almost three months since I've been here, and for the first time, Zhao Zheng sincerely feels that this family is really poor, so poor that it can't be worse, and it's so poor that it rings.

At this time, he seemed to realize that if he wanted to give full play to his future advantages in this backward era, he must establish an industrial system with his knowledge as the core as soon as possible. Relying on yourself to make a big splash is a dream!

"It seems that we really have to start a class for them quickly......" Zhao Zheng muttered.

Nitrate and sulfur are natural things, and with Zhao Zheng's current ability, it is not difficult to refine nitrate and sulfur with low purity under today's conditions. It's just that now the storm outside is not stopping, and there are no conditions to allow Zhao Zheng to go out to look for minerals.

"I'll go, what can I do?"

Zhao Zheng regretted it at this time, he regretted that he only gave him three days, and even regretted accepting Shen Lang and others as apprentices.

At this time, it was raining heavily outside the house, and inside the house, Zhao Ji was snoring like thunder, Zhao Zheng was half leaning on the kang, and the cold soil kang could not bring him even a trace of warmth.

turned his brain upside down, Zhao Zheng still didn't come up with a reason, and he didn't even imagine a substitute for gunpowder. After all, in Zhao Zheng's opinion, the explosive power of gunpowder can give them the most spiritual shock.

"Gunpowder...... Gunpowder...... Gunpowder ......" Zhao Zheng kept muttering on the kang.

Suddenly, Shen Lang's figure flashed in Zhao Zheng's mind, and after thinking about it carefully, he sat up suddenly.

"Xia Wuqi!"

Zhao Zheng was so excited that he almost didn't shout. With a fierce wave of his fist in the air, Zhao Zheng's originally hanging heart could finally return to his stomach.

"Yes! Xia Wuqi's guy is obsessed with immortality, so there should be a lot of things like saltpeter, sulfur, mercury, cinnabar, and the like! Well, that's great, I'm so smart! Haha......"

Thinking of this, Zhao Zheng's heart instantly became much happier, and the sound of rain and Zhao Ji's thunderous snoring, which originally sounded very annoying, seemed to have become much more pleasant at this time.

Zhao Zhengmo rubbed his chin, grinned and said to himself, "Hehe...... Not much, as long as you can make up enough ten catties, Lao Tzu will let you taste the power of science! ”

Because he had an idea in his heart, Zhao Zheng couldn't sit still. After tucking the corners of the quilt for Zhao Ji, Zhao Zheng ran impatiently to the earthen stove to dig out the ashes......