Zangzhou and Great Qin have set a plan, except for very few people who know, others have no knowledge, Liu Yuetian also knows nothing about the conspiracy of the two sides, although he speculated that these two sides are likely to be the first to attack him, but after all, it is just a guess, he has not seen the King of Qin, how can the other party know what is in his heart? However, since Chang'an's return, he has begun to have a new interest, which is the steam engine.

The principle of the steam engine is very simple, that is, to evaporate water with heat, and then use the power of water vapor to replace manpower, which is the most basic technology, and it is also the technology that can be realized in this society.

Now it has entered the winter, everything on the earth withered, the snow was thick on the ground, and it looked desolate, in the past winter, the people had no food and no clothes, and the cold threatened their lives anytime and anywhere, but this year, the people of Tianshui were destined to go through a joyful winter, and the harvest of grain made them no longer worry about the cold, but it was not enough to be able to eat enough, the development of commerce brought huge wealth, although these wealth could not directly enter the pockets of the people, But Liu Yuetian distributed these wealth to the people through secondary distribution, and the people had money in their hands, and the development of Tianshui commerce today is far beyond the past, which can be seen from the number of merchants, Liu Yuan period, there are more than 20 merchants in the city, and now it has skyrocketed to more than 70, inns and restaurants naturally needless to say, in addition, what clothing stores, medicine stores, etc. have been opened, basically solving the people's food, clothing, housing and transportation, and they can find whatever they want to eat, so now they have to walk on the streets of Tianshui, You can smell the smell of pork and beef and mutton everywhere in the sky above the city.

At this time, on a clearing outside Tianshui, the snow here was cleared clean, and dozens of people gathered together, shouting and shouting from time to time.

"Wow! Moved, moved, amazing! ”

I saw a four-wheeled car moving slowly, but there was no horse in front of the car, but there was an iron box more than one person high placed on the car, and the wheels of this car were also different from other cars, and several iron bars were connected to the four wheels, and the iron bars were connected to the iron box on the car.

The box was very hot, and there was a mist from the cold air around it, and there was an opening underneath it, and a man in the car was throwing black coals into his mouth with a shovel.

"See? This is the steam engine, which does not require manpower, as long as it burns constantly, and the steam can be used to make the vehicle move. ”

Liu Yuetian explained to everyone.

"Lord, this thing is indeed magical, but I don't understand, this speed is too slow, not to mention horse-pulling, even if it comes and goes, it is faster than this!"

Chang Yuchun asked puzzledly, and the others also nodded, in their eyes, this thing was just fun, but it didn't have any practical effect.

"Brother Chang, this steam engine is just an experimental product, and the efficiency is still very low, but once it runs at full capacity, the speed of the carriage can still be increased."

Liu Yuetian explained.

"Improve? That's probably not as good as a horse. ”

Shi Le also shook his head and said.

"Hmph, you know a!"

Zu Chongzhi on the side said loudly.

"You guys, you're really short-sighted, what is this carriage? If the carriage were enlarged tenfold, what horse would be able to pull it? If the wagon were a warship, would you always be able to propel it through the water? Once my steam engine is really formed, it is enough to pull a carriage that can carry a hundred people, if it is added to the warship, even if it is against the current, it is no problem, these are not comparable to manpower and horsepower, if the steam engine is installed on the trebuchet, it can throw hundreds of catties of stones hundreds of zhang away, if you attack the city, who can stop it? ”

Zu Chongzhi went back directly.

"What? What else can you do? ”

Everyone understood a little, but they still didn't believe Zu Chongzhi's words.

"Everyone, Brother Zu is right, this steam engine is just an experiment, it belongs to the first generation, I have now asked Meng Sheng and them to start building the next generation of steam engines, it won't take long to build them, the second generation of steam engines can be used on ships, once successful, the ships we make will be able to go up the river to Tianzang City."

Everyone didn't believe Zu Chongzhi's words, but no one questioned Liu Yuetian's words at all, which made people excited all of a sudden.

"My lord, are you true? If so, then Gesar will be out of luck! ”

"Lord, it's a bit of a waste to use it on the ship first, if it is used on the car, then our soldiers will be comfortable, a car with hundreds of people, my mother, I can't imagine it!"

"Hehe, not only that, the most important thing now is speed, I plan to first create a batch of troops that can travel five hundred miles a day to move quickly, as long as all the equipment is equipped, a thousand miles can be reached in two days, if there is this kind of vehicle, who can stop the pace of our army?"

Liu Yuetian said with a smile.

"Then hurry up and build it! Haha, it's exciting to think about! ”

Because of a large amount of coal, the manufacture of steam engines is now put in the first place in the development of Tianshui by Liu Yuetian, for which he also brought a lot of craftsmen from Chang'an, carpenters, blacksmiths, etc., now there are more than 200 craftsmen in Tianshui, and under their non-stop work day and night, the manufacture of steam engines is also rapid.

Only ten days later, the second steam engine was built, and then placed on a huge vehicle more than ten zhang long, more than forty people sat on the car, the steam engine ran so that the big car reached a speed of more than forty miles per hour, if you move at this speed, you can rush thousands of miles in a day, it is simply unimaginable.

Of course, because of the limitation of materials, the parts of the steam engine and the vehicle can not withstand the long-term operation, which involves the improvement of materials, but this is not difficult for Liu Yuetian, he further refined the coal, and practiced the coal coke with high heat, which can produce a high temperature of more than 2,000 degrees, and at this temperature the pig iron can be smelted into a higher grade of steel, using this steel as a material, you can greatly improve the durability of the vehicle has a steam engine.

"This is the beginning of industry!"

Liu Yuetian explained to everyone in the Taishou Mansion.

The beginning of his previous life industry came from the invention of the steam engine, once the steam engine was manufactured, around it was the invention of various machinery, human beings have entered the steam age relying on machinery from the agricultural society that relied on nature, this transformation has epoch-making significance for the development of human beings, and now, Liu Yuetian has passed on this concept to all his subordinates.