Datang: I was exposed by Princess Changle

The voice of discussion finally quieted down.

"Qinglong King, what exactly is this?"

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Chapter 304 is Shocking!

Finally someone couldn't help but asked aloud.

This person is Li Jing, because he still bet with Li Shimin!

At this moment, everyone's eyes were on Lin Xuan.

"This is the steam train!"

Lin Xuan looked around and announced proudly.

"This thing is a magical thing that can make a hundred thousand troops reach Yanmen Pass in one day!"

"After it is started, it can travel 320 miles at the fastest within an hour!"

Li Jing said in astonishment: "What?!"

"320 miles per hour!?"

Li Shimin's eyes widened, his face full of astonishment, "Twelve hours in that day...wouldn't it be possible to travel three or four thousand miles?!"

Yuchi Jingde on the side said in disbelief: "How is this possible?!"

"Flying three thousand miles a day?"

"Am I dreaming?"

Lin Xuan smiled slightly.

"You are not dreaming! You are indeed in reality! You heard me right!"

"This steam train can travel three thousand miles a day, it's absolutely true!"

"One day is enough to drive from Chang'an to Yanmenguan."

Lin Xuan said happily.

Li Shimin's eyes turned to Li Jing, and he said triumphantly with a half-smile: "How?"

"Duke Wei, have you already lost?"

"The Azure Dragon King can't tell nonsense, the data he gave can stand the test!"

"If you don't believe me, we can verify it right away!"

The voice just fell.

Li Jing rubbed his nose and said helplessly: "Since Your Majesty has said so, it must be true what the Azure Dragon King said..."

"The facts are right in front of our eyes, and the future general can't have the slightest doubt."

This Lin Xuan directly took out something beyond his cognition, which made him want to refute, but he didn't know where to refute!

"Well, the last general is willing to be the vanguard. As long as I can contribute to the Great Tang, I, Li Jing, don't care if His Majesty asks me to take up any position."

"Wait a minute." Li Shimin said suddenly.

"Your Majesty, the 'steam train' invented by King Qinglong, how many people can it carry at one go?"

Li Jing asked curiously.

"Also, how much raw material does it need to consume once it starts?"

"But I don't believe it. It doesn't take any consumption to drive such a huge monster... That must be a huge number, and we may not even be able to bear it?"

Li Jing speculated with a face of course.

As soon as this word comes out.

Lin Xuan was slightly taken aback when he heard this.

Didn't expect a general like Li Jing to be quite forward-thinking, knowing "energy conservation"? !

"Yes, to start this train, the energy required is massive."

Lin Xuan responded lightly.

"Why do I call it a steam train?"

"As the name suggests, it needs to rely on boiling water to maintain its power!"

"Actually, boiling water is just a process. The real key is the water vapor obtained from boiling water..."

"This water vapor is able to move the piston and make the train run."

"However, you don't necessarily understand this."

"Anyway, all you need to know is that it relies on the water vapor obtained from boiling water to propel it forward."

"And in this world, what is the fastest to boil water? And the highest efficiency? Of course it is coal."

"So, the energy it needs to consume is coal!"

"I explained it this way, can you understand a little now?"

Lin Xuan explained eloquently.

The voice just fell.

"coal?!"

Li Shimin frowned slightly when he heard the words, and said with a puzzled expression.

"As far as I know, there is such a thing as coal, but it is not an easy task to get it out..."

"There are not many coal mines in Datang."

In Datang, coal has not yet entered the public's field of vision, and it has not yet entered the homes of ordinary people at all.

Most people still use firewood to light fire.

In fact, even in later generations, when coal resources are abundant, not many ordinary people will use coal, and most people still burn wood for fire.