"This is okay! But it's not possible in the west mountain direction. The terrain is high and a water tanker is needed to collect water." Cao Huaimin said after thinking carefully.

"Then let's make a waterwheel." Hong Lianshuo smiled and nodded.

"Okay!" Cao Huaimin responded with a smile.

"Do we use wood to make shovels and pickaxes?" Hong Lianshuo looked directly at Cao Huaimin and asked, "Use wood to melt the damaged weapons into molten iron."

"That's right! What can we use if we don't use wood? Firewood is all used for making fires." Cao Huaimin blinked at her with his dark eyes and said, "What do you think, Mrs. Hong?"

"No, no?" Hong Lianshuo shook his head slightly when he heard this.

There is no coal now, and it is not that easy to find a coal mine. And even if you find a coal mine, coal mining is hard work and you won't be able to dig it out for a while.

Hong Lianshuo's eyes flickered slightly, and he suddenly thought of it, "Is there any way to help burn the fire?"

"Supporting combustion?" Cao Huaimin scratched his head and looked at her in confusion and said, "Can you be more specific?"

"That's it?" Hong Lianshuo thought about it seriously and said, "I just blew into the stove because I didn't like the fire." He pursed his lips and said, "How do you say something?" He patted his thigh and smiled, "

Come to think of it, I don’t know anything about blowing fire through a rolling pin!”

Cao Huaimin finally understood and said with a smile, "Nowadays, we don't use bamboo pipes to blow fire. It's like blacksmiths use leather bags to blast iron. This kind of leather bag is thin at both ends and bulging in the middle..."

"I know." Hong Lianshuo nodded clearly and said, "Squeeze."

"Yes, yes!" Cao Huaimin said with a smile.

"Is there nothing else?" Hong Lianshuo looked at him expectantly and asked.

"No." Cao Huaimin looked at her with dark eyes and said, "The skin-bag wind blower has been around since the Spring and Autumn Period and the Warring States Period. It is also called a windbag made of cowhide; a windbag originally refers to a wind instrument with a mouth, and blacksmiths also call them losers.

Air ducts. The iron-smelting technology of the Han Dynasty developed significantly, which was closely related to the improvement of the power of the scuttle."

Hong Lianshuo frowned slightly when he heard this and said, "This is too tiring! I have to keep squeezing my hands."

Cao Huaimin was stunned when he heard this, and then laughed and said, "There are people who step on it. Besides, I'm used to it, so I can't say I'm tired."

Hong Lianshuo stroked his forehead. There was no pattern on this bellows. How should grandma modify it?

Wait a minute, can the air blowing in the skin be improved? Hong Lianshuo looked at Cao Huaimin with green eyes and said, "Can't the air blowing in the skin be improved?"

"Uh..." Cao Huaimin pursed his lips as she stared at her, "I can't explain this clearly, I'll draw it for you!" He poured the water directly on the small square wooden table, "It has 3

A wooden ring, two circular plates, covered with leather. Open the tuo, and air enters the tuo through the air inlet valve; compress the tuo, and the air in the tuo enters the air duct through the exhaust valve.

Finally, it enters the smelting furnace."

Hong Lianshuo looked at him with bright eyes, a smile on his eyes and brows. He could improve it, "The air blast of this skin bag is one-way, can it be changed to two-way?" He dipped his index finger in water and started drawing, "And the animal skin bag

It’s hard to find, but it’s made of wood! You can make as many as you want, and it can reach thousands of households.”

Cao Huaimin twirled his beard and stared at the wind blowing equipment she painted, "You look like what Laozi described: between heaven and earth, it is like a coffin? It is empty but unyielding, and it gets stronger when it moves."

Hong Lianshuo was stunned for a moment, then nodded hurriedly, "Yeah! The more it pushes and pulls, the greater the amount of air it gives out. Isn't the world between heaven and earth just like a bellows? Although it is empty, it will not be exhausted."

What Hong Lianshuo painted was actually a bellows, which was used by every household in later generations to make fires and cook. It was a brick stove with a bellows placed next to it.

After filling the pot with water, light the firewood and put it into the mouth of the stove. Pull the bellows with your right hand and add firewood with your left hand.

The bellows is a rectangular box with an air inlet at each end of the box: when the rectangular box is pulled out by hand, the air is sucked in from the far end; when it is pushed in, the air is sucked in from the near side.

In both the inward and outward processes, air is sucked into the box; in both cases the compressed part of the air is pushed into the side chamber, where it is discharged through the exhaust port.

"You can ask a carpenter to make it for you to try." Cao Huaimin nodded with a flash of light in his eyes.

"It's best to hurry up, our blacksmith needs Wen the most..." Hong Lianshuo braked suddenly, swallowed the temperature, pursed his lips and changed his words, "It's easier to strike iron when the fire is strong."

"I'll go as soon as I finish drawing the pattern." Cao Huaimin said immediately after hearing this.

"Can't we go now?" Hong Lianshuo looked at him eagerly and said, "Don't you already have this pattern?"

"There's no point in hurrying! Look at this pattern when it's done." Cao Huaimin looked at her in a hurry with his smiling black eyes. He tapped his index finger on the watermark pattern on the small wooden table, which had already been blown dry by the wind.

"I'm too impatient." Hong Lianshuo sheepishly lowered his eyebrows and chuckled.

"I'm also anxious. If it works as expected and is better than the skin blast, it will be a huge progress for iron smelting." Cao Huaimin looked at her with shining black eyes and said, "I will focus on doing it as soon as possible.

Okay, this is very important."

"Yeah!" Hong Lianshuo nodded repeatedly, "Call me when you're ready."

"Let's see how it works together?" Cao Huaimin said with a smile, cupped his hands towards her and said, "I'm going to go in and draw the pattern."

"I won't delay you, I'm leaving." Hong Lianshuo followed suit and cupped his hands, put down his son and walked away.

"We're leaving too." Han Qinhu and the others stood up and said, cupping their hands.

Cao Huaimin watched them leave, then turned back to the house and continued to draw the house plan, waiting only for the red bricks to be ready to build the house.

Several kilns are firing bricks day and night, so it should be done soon.

&*&

"Nan Zheng, today we are talking about ancient times. I listened to the tail and saw that you are quite orderly and methodical. You have used these wooden boards." Han Qinhu looked at him with a smile on his lips and said, "Both the Chu and Han sides above

It’s written clearly.”

"Hey! Stop talking, I'm already embarrassed." Lin Nanzheng stroked his forehead and said sheepishly, blushing and said, "I have never been so embarrassed in my life."

"What's going on?" Chen Zhongyuan's big bell-like eyes looked at him curiously and said, "Nan Zheng taught the brothers how to write. You must have the patience to teach them well."

"Yes! After reading and writing this, brothers will remember a lot of words." Sixi sipped her saliva and said, "I made few mistakes, but I still ate the big chicken legs."

"Haha..." Everyone laughed.

Chen Zhongyuan looked at Lin Nanzheng with confusion in his eyes and asked, "Why is there something wrong with ancient times?"

"You are familiar with history books." Han Qinhu tilted his head slightly and looked at him and said briskly, "This shouldn't be difficult for you!"

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