The first steam engine ran for a few moments without incident, which was a good sign, at least the inferior parts could last the steam engine for a while.

Then Yunyi ordered people to add coal to the boiler and use coal as fuel for the steam engine, this time the steam engine was running at full strength, and Yunyi experimented with the power of the steam engine again and again, until the limit power of the steam engine stopped.

The first steam engine almost met Yunyi's needs, and the steam engine assembled from the parts handmade by blacksmiths was ready for use, and now the steam engine has two main uses, one is to pump water for mines, and the other is a steam-powered machine tool, so Yunyi now needs more steam engines.

The first steam engine trial was successful, Yun Yi was very happy, the blacksmith in the manor had a lot of credit, Yun Yi was rewarded, one ordinary blacksmith had 1 gold, seven old blacksmiths had 2 gold, and Tian Hao, the manager of the manor, had 10 gold.

2 gold is basically enough for an ordinary family to live for a year, Yunyi's reward is already very high for them, and everyone who gets the reward is also smiling.

However, what needs to be kept secret must be kept secret, and once there is a problem, Yunhua Yun's will definitely investigate it to the end.

After Yunyi left the manor, the blacksmiths in the manor continued to be busy, and they also had parts to continue to build the steam engine, and Yunyi needed more steam engines.

There is a lot of iron used to build steam engine parts, it is difficult to meet the demand just from the outside world, the iron purchased from the outside is not only of poor quality, the price is relatively high, and the purchase of a large amount of iron will also cause unnecessary misunderstandings, but fortunately, the iron ore can be mined in less than two months.

Yunhua County is about two thousand miles away from the imperial capital Xinping, Yun Jie and his party have two fast horses each, and they can go back and forth in three months.

The preparation of the iron ore is already in progress, and when Yun Jie comes back with the paperwork, he can mine it, there is the matter of the last silver mine, and there should not be many problems in mining iron ore this time.

In order to make it more convenient to mine iron ore, Yunyi also had to prepare one more thing in addition to the steam engine - gunpowder.

The four major inventions of ancient China: one is papermaking, the second is printing, the third is gunpowder, and the fourth is the compass.

These four major inventions are the crystallization of the wisdom of the ancient Chinese, and now papermaking and printing have appeared in this world completely different from the earth, which will bring great benefits to the Yun family.

The major forces only saw the huge benefits brought by Yunhua paper, but did not notice that the printing technology is not weaker than papermaking at all, and one day printing technology will also exude its dazzling light in this world, of course, the later it is discovered, the better.

One of the four major inventions of the compass is a good thing, with a compass, the possibility of people getting lost is greatly reduced, it is a necessary thing to go out and march to war, Yunyi wants to build a steamship to explore the sea, the compass is also indispensable, the compass is relatively simple, only there is a magnet, it can be made at any time, Yunyi did not find magnetite in Yunhua County, but in the territory of the Dali Empire, there are people who sell magnets as rare things, and even there are gates made of magnets in the court, Prevent someone from assassinating the emperor with a weapon.

In addition to the above three, the four major inventions are only gunpowder, for Yunyi, the other three major inventions are very important, gunpowder is the most important, with gunpowder, not only can facilitate the mining of iron ore, but also increase Yun's force.

The steam engine has come out, and the steam machine tool will soon be manufactured, and with the steam machine tool, all kinds of firearms can be manufactured in batches.

Gunpowder has already appeared in this world, and it is an accidental product obtained by alchemists or alchemists when they make alchemy, but no one pays attention to it.

The alchemist is one of the hundred schools of thought, there are not many people in this school, their status is not low, and they are often guests on the throne.

As an emperor, there is no one who does not want to live forever, martial arts can prolong life, but martial arts has also entered the limit, whether there is a realm above the innate no one knows, even if you become an innate martial artist, you can only live to 150 years old at most, and then you will still die.

Basically, the founding emperors of various countries are powerful warriors, but whether the descendants of the emperor have the talent for martial arts is unknown, the emperor enjoys a comfortable life, and then returns to the days of insisting on practicing martial arts every day, thinking about the possibility is not big, and the emperor who is delusional about immortality will use his supreme power to find a way to live forever.

This is the time for the alchemist to appear, they said to the emperor that they can refine the "elixir", eat a "elixir" can live forever, the two hit it off, the emperor provides various resources to the alchemist to refine the "elixir", and the alchemist also enjoys a better life.

As for why the emperor can't live forever after eating the "elixir", the alchemists will use things such as "the elixir is not so easy to refine".

From time to time, alchemists were killed by emperors, but more alchemists appeared and became guests of emperors or nobles.

Now Yunyi wants to carry forward the unexpected products obtained by the alchemist when he was alchemizing.

The raw materials for making gunpowder are very simple, mainly charcoal, sulfur, and saltpeter, all of which can be found in Yunhua County, and gunpowder can be quickly mass-produced.

However, gunpowder is a dangerous thing, and if an accident occurs, it is likely to cause a major danger, so it is necessary to pay strict attention to safety when producing, storing, and using gunpowder.

The steam engine is not afraid of being discovered by outsiders, and if outsiders find out, it will only be regarded as a strange skill, but gunpowder can be used in war, once it is discovered by outsiders, others also learn to use gunpowder, which is not good for Yunyi, Yunyi decided to hide the gunpowder production site, and pay attention to the secrecy of gunpowder when mining mines.

The last time Yun Yi traveled around Yunhua County, he found several locations, the places were remote and hidden, and they were large enough to set up secret factories and secretly train troops.

Yunyi plans to build a gunpowder factory and a firearms factory in other places named because of "No. 1 Base", and the workers of the factory are not allowed to leave here for a short time after entering this place, anyway, "No. 1 Base" is big enough, and workers can bring their families over.

The plan has been set, as Yunyi's number one henchman, Xu Hui is personally responsible for the establishment of the "No. 1 base", as for the paper mill and printing plant, Yunyi found a person from the family to be responsible for management, this person is named Yunlang, twenty-five years old, ordinary figure, slightly handsome appearance, used to be a small supervisor in Yun's firm, and has a good talent in business.