When Lin Qian'an saw this building, his expression was very wonderful.

If the quality can be improved with this thing, will he not have to work hard to improve the quality of items in the future?

Immediately, Lin Qian'an threw in a pile of low-quality, ordinary, and sophisticated processing materials and excellent-grade tools, and also threw in a top-quality material.

These things are tumbling in the quality improvement pool, and there is a progress bar above each item showing [Quality is being improved].

Of course, except for that top-quality material.

Lin Qian'an understood clearly that this thing could only be upgraded to the highest level, and then it wouldn't work anymore.

So he used his backhand to salvage the top-quality material again.

Since there was still some time left on the progress bar, Lin Qianan simply built a new quality improvement pool next to it.

After building five quality improvement pools one after another, Lin Qianan stopped.

Each quality improvement pool is filled to the brim with materials.

If this thing can really improve the quality of all items to the best, it will probably be the largest consumption building in the future.

Following Lin Qian'an's observation, the materials in the first quality improvement pool had all been upgraded to a higher quality.

The water inside still kept boiling.

Lin Qian'an calculated the time and found that it would take about an hour to improve a quality.

Then he looked at the durability consumption again.

Then he couldn't help but twitch the corners of his mouth.

The total number of materials and tools he threw into this pool was about thirty, and now the durability has been reduced by half.

If he wants to rely on the quality improvement pool to mass-produce top-quality materials or equipment, I'm afraid it won't be that easy.

But compared to the past when we could only rely on probability, it is much better now.

Lin Qian'an took out the top-quality materials and tools, put some more high-quality materials inside, and soon began to build a new quality improvement pool.

There is no upper limit to his demand for top quality materials, so the more quality improvement pools he has, the better.

After building fifteen quality improvement pools, Lin Qianan stopped.

Although it is easy to gamble on the best boiling water, Nian's physical strength is also depleted, isn't it?

So Lin Qian'an didn't plan to become fat in one bite.

Looking back, Lin Qianan used his mind to build the black iron again.

Metal materials are the key to unlocking the technology tree.

Lin Qian'an had tried to build a steam engine out of wood or stone before. Even if it had the best skills, its durability would drop like a leaky pot. Even if it worked, it wouldn't last long.

So if you want to unlock the steam engine, you must first unlock the material technology.

The amount of black iron quickly accumulated to a certain level, and Lin Qian'an had already unlocked the blueprint for the small steam engine.

[Simple steam engine blueprint [white]: Processing wood*26, processing stone*20, processing charcoal*17, water*14. (Construction consumption of physical strength: 38)]

Just change the two materials for processing wood and processing stone into black iron.

Lin Qian'an clicked to add materials, replaced all processed wood and processed stone with black iron, then added processed charcoal and water, and immediately started construction.

Boilers, chains, air pipes, pistons... As construction continued, a small steam engine soon appeared.

Simple steam engine [white]

Quality: ordinary

Durability:622/622

[Instructions: Try boiling water.]

Start up, preheat, the water will boil soon, and the high pressure of steam will start to push the piston to drive the machinery.

Along with the sound of the piston's continuous operation, Lin Qian'an's face also showed joy.

By the way, this thing actually has an achievement, and it has been obtained by Lin Qianan.

[Tip: You have unlocked the achievement [Steam Age], received rewards, item upgrade card [White]*1]

[Steam Age: Develop machines that utilize steam. (Note: This violent roar is so intoxicating!!)]

This white item upgrade card plus the item upgrade card obtained from the [Wind Age] achievement, Lin Qian'an now has two white item upgrade cards.

In other words, he can directly upgrade two green-level items.

However, the items for achievement rewards should be used one at a time. Lin Qianan did not dare to use them indiscriminately. They must be used in key places.

Just like upgrading the library level before.

The first two gray item upgrade cards were used by him to upgrade stone axes and arrows. Now that he thinks about it, it was really a waste.

With the steam engine made of black iron, Lin Qian'an did not need to specifically guide the craftsmen in the village. They spontaneously began to study various machines using steam engines.

Soon there were steam cars transporting goods in the city.

Even in winter, you can still hear the roar of steam engines.

At this time, Lin Qian'an was building roads and rails to pave the way for future steam locomotives. He was also asking craftsmen in the village to study generators.

No matter how useful the steam engine is, electricity is always indispensable.

....

At this point, time begins to accelerate.

In the second year of the founding of the People's Republic of China.

The first steam locomotive was put into trial operation and began to travel hundreds of miles to transport goods. At the same time, the country also preliminary researched on electrical machinery.

Therefore, Lin Qian'an unlocked new achievements.

[Tip: You have unlocked the achievement [Electricity Age], received rewards, item upgrade card [green]*1.]

[Electricity Age: Develop a machine that uses electricity and run it for ten minutes. (Note: The power of lightning!)]

This just shows that there is electricity, but Nianguo is still very backward in the use of electricity. Even conductive materials are made by forcibly imparting them through skill grant books.

As Nian Country continued to develop, the area covered by its influence became larger and larger, surrounding tribes began to be absorbed one by one, and the population began to expand.

This year, after absorbing people from three tribes, Nian City finally exceeded the population of tens of thousands.

At the same time, Nian Guo found a new metal vein and began to smelt other metal materials.

I have been studying for three years.

Oil was discovered, coal mines were also discovered, and a series of technologies were pointed out by the cheating Nianguo people.

At the same time, the population of Nianguo exceeded 30,000, and Niancheng was finally filled with people.

However, this population is still too small.

Five years after the founding of the People's Republic of China, with the accumulation of various top-quality materials, the first aircraft capable of flying in the sky was born.

[Tip: You have unlocked the achievement [Fly into the Sky] and received the reward, Anti-Gravity Badge [Blue]*1.]

[Fly into the sky: stand still in the sky for ten minutes. (Note: It’s so cold here...)]

[Anti-Gravity Badge [Blue]: After wearing it, you can escape the gravity of the planet.]

With this badge, it becomes easier for Lin Qianan to explore the world.

Just let Nian put on the badge and start flying in the sky and explore the map.

Soon, Lin Qian'an saw new tribes and various strange birds, animals, fish and insects.

Lin Qian'an absorbed those new tribes as a population, and tamed the birds, animals, fish and insects that could be domesticated, fed those that could be fed, and studied those that could be studied. Anyway, there was no shortage of them.

Remember the ten years since the founding of the country.

Today, the population of Nianguo has reached 100,000, and it has three cities.

The technology tree has also broken through to the point where electric energy can be easily utilized.

The people of Nianguo no longer worry about food and clothing.

However, after all, the population is still too small, which limits the speed of development.

Because there was no shortage of food, Lin Qian'an also began to spread extraordinary knowledge.

Here, only the three extraordinary methods of martial arts, witchcraft and weapon cultivation can be spread, and the rest are out of place.

And even these three types have some minor problems.

For example, in terms of martial arts, there is no way to practice internal strength. The tendons and Dantian are different. The only way is to improve the qi and blood and temper the body.

As for witchcraft, the spiritual power improved by meditation appears to be quite slow.

Utensil cultivation has the widest adaptability, but there is also a small problem, that is, the cultivation of utensils consumes more energy and spirit, and the effect is poor, and the utensils cannot breed spirituality.

However, although spirituality cannot be born, the utensils can improve their strength and quality through cultivation.

Because of this, a new profession appears here in the "Yunqi Zhenjing" called Yunwu Master.
To be continued...