After Li Chenghua finished speaking, he pulled out the Longquan sword from Li Shimin's waist again.

I used the Longquan Sword as a hoe to dig potatoes.

“…”

Seeing Li Chenghua's skillful operation, Li Shimin, Li Jing and Cheng Yaojin all smiled bitterly.

You should know that before, Li Chenghua used Li Shimin's Longquan sword as a hoe to dig konjac.

Soon, Li Chenghua dug a bunch of potatoes out.

"This...is potato?"

"So big? It's round, I've never seen this thing before."

"Not only that, there are as many as seven or eight potatoes?"

Li Shimin and others were shocked by Tudou at once.

Suddenly, Li Shimin's eyes lit up and he said to Li Chenghua: "Boy...oh, that Chenghua isn't it? Can this thing be eaten?"

Li Chenghua curled his lips and said, "You are stupid, you can't eat it. Why am I growing these things? Can you feed pigs?"

"Can you eat it? Crack!!! Ah, bah bah bah bah..."

Cheng Yaojin wiped a potato with his sleeve, and then vomited after taking a bite!

"Hmm? Could it be poisonous?"

Li Jing took a bite in confusion, then rolled his eyes and swallowed.

"How could it be poisonous?"

Li Shimin is so panicked now! If it is poisonous and inedible? Then he will be so happy.

He picked up a potato and took it, and Li Shimin vomited it out and said angrily: "Ah... boy, didn't you say that this [potato] is edible? Why is it so unpalatable?"

Lee Seung-hwa laughed and said, "You guys are so old-fashioned, I'm so laughing to death!

These potatoes cannot be eaten raw, they must be cooked or cooked. Xiong Er, bring some firewood..."

…………

"Himmer! No, I...well, I really can't eat it!"

Half an hour later, Li Shimin touched his stomach and burped, saying that he was so full!

Li Jing also wiped his mouth, indicating that he could not eat it anymore.

Even foodie Cheng Yaojin, after eating three more potatoes, he held his stomach and turned around.

Li Chenghua said speechlessly: "Damn, are you starving ghosts reincarnated?

You almost finished eating this pile of potatoes! How about it, I didn’t lie to you, you can really eat it, right?”

Cheng Yaojin laughed and said, "It's delicious, it's really delicious! And it seems that this thing is not easy to break. If it is used for marching and fighting..."

Li Jing interrupted and said, "This thing can not only be used as military rations! If it is an ordinary citizen..."

Li Shimin suddenly asked, "Chenghua! These potatoes are indeed edible! Well, I wonder how much the yield?"

"Yield?"

Li Chenghua thought for a while and said, "I am carefully farming here, and the yield per mu is about 6,000 kilograms!"

Just now, Li Chenghua asked about Xueer in the system and found out the approximate yield per mu.

Then, Li Chenghua thought the system was even more awesome!

Even in the 21st century, the yield per mu of potato is 6,000 kilograms.

"What? More than 6,000 kilograms?"

Li Shimin and others were shocked and almost fell down collectively.

Li Chenghua raised his lips and waved, "Hey, are you rural guys a little promising, okay?

Don't be too happy too early! I mean the yield per mu is 6,000 kilograms! In other barren lands, the yield per mu is about 3,000 kilograms, right?"

"3…3000 kilograms?"

Li Shimin's eyes began to become congested at this moment!

Then, he grabbed Li Chenghua with his trembling hands and said, "Be serious? This potato can produce 3,000 kilograms on the land?"

Li Chenghua curled his lips and said, "3,000 kilograms is a conservative estimate! If I follow my farming method, the yield per mu should be about 4,000 kilograms!"

"4000 kilograms?"

Li Shimin's eyes have become copper bells!

Then, he pointed at the potato field with his trembling fingers and said excitedly: "Then... how many acres of this land is? How many kilograms of potatoes can be produced?"

Li Chenghua looked like Li Shimin who was injected with chicken blood, and Li Jing and Cheng Yaojin who were stunned?

Yun Danfeng said: "This land... is 100 acres!

As for the output? Well, 6,000 kilograms per mu, 100 mu is 600,000 kilograms!"

The output Li Chenghua mentioned was based on the [mu] and [jin] of the Tang Dynasty.

One acre of the Tang Dynasty is about 0.9 acres in the future.

One pound of the Tang Dynasty is heavier than the one in the future. However, the difference is not particularly big.

"600,000 jin?"

Li Shimin sat on the ground with a pounce!

Then, he murmured a little in dismay: "600,000 jin?

If these 600,000 kilograms of potatoes are kept as seeds and planted them all in the Tang Dynasty? Then the yield... is enough to change the fate of the people of the Tang Dynasty!"

His Majesty Emperor Li Er has this expression? Needless to say, Li Jing and Cheng Yaojin.

At this moment, all three of them have been petrified!

Looking up at the sun?

Lee Seung-hwa said angrily: "Hey, everyone, wake up! We are going to do a serious business!"

Next, Li Chenghua and Li Shimin and others showed the power of gunpowder!

Look at gunpowder that can explode stones?

Li Shimin and others were stunned again!

…………

After returning to the palace, Li Shimin took apart the secret recipe for gunpowder that Li Chenghua gave him?

Li Shimin hesitated for a moment and slowly opened the envelope.

Empress Changsun immediately avoided it.

Since Li Chenghua regards this gunpowder formula as a top secret, Empress Changsun naturally knows to avoid suspicion.

After reading this gunpowder formula, Li Shimin had a little confused expression.

Because the materials listed in this recipe are the most basic saltpeter, sulfur, and charcoal, which is similar to the current fireworks and gunpowder?

However, there are some special materials that Li Shimin cannot understand. Moreover, the configuration ratio is also different.

Li Shimin was a little strange - the same thing is just different proportions, plus some special materials, the gunpowder produced in this way will turn the gunpowder that sets fireworks into fierce gunpowder that can blow up rocks?

In the envelope, Li Chenghua repeatedly emphasized that this recipe must be kept confidential!

Even the person who is responsible for making gunpowder will burn it after reading this recipe!

This recipe is finally recorded in the brain and cannot be saved in text. Otherwise, once this recipe is spread to the enemy, the Tang Dynasty may even have a disaster of destroying the country!

"The disaster of destruction?"

Li Shimin repeated this sentence, his face becoming more and more serious.

How magical Li Chenghua is, Li Shimin has seen these. The gunpowder that can make Li Chenghua treat him so carefully must be extraordinary, and must be amazingly powerful and lethal!

Who are you looking for to make this gunpowder? Use this gunpowder? After thinking for a while, Li Shimin shouted: "Come here, hurry up and call Cheng Zhijie, and two generals Niu Jinda into the palace!"

According to Li Chenghua's water conservancy plan, this gunpowder must be manufactured as soon as possible, and then a large-scale mining of rocks can be made! Therefore, Li Shimin did not hesitate.

He was going to let Niu Jinda take charge of the gunpowder formula and the production of gunpowder.

Let Cheng Yaojin be responsible for supervising and using these gunpowders.

Cheng Yaojin and Niu Jinda are definitely people who Li Shimin can trust!

The most important thing is that Cheng Yaojin and Niu Jinda are very good to Li Chenghua, so there should be no problem when they cooperate!

"Second brother, is this gunpowder really amazing?" At this time, Empress Changsun came over and said softly.
Chapter completed!