In the blink of an eye, three months have passed.

On the economic front, the currency swap has begun to be in full swing. The response to the first batch of new coins in the market has been very good, and the whole process has been very smooth. After proving that the new currency has the same purchasing power as the old currency, there is even a situation in the private market where the people are more welcoming to the new currency.

The main thing is that money and women are actually the same truth, and in the case of determining the same function, it is always more refreshing to use the new one than the old one.

Moreover, the new currency is now called "coin" by the common people in the market. When the new currency was first put into the market, the people called it small, medium, and large, and the upper currency was half silver, silver, half-gold and gold. However, because it is too cumbersome to call it this way, because the obverse of the new coin is the head of the First Emperor, and the First Emperor is the surname of Win. As a result, the new coin was called a win coin, and then slowly transitioned into a coin.

Nowadays, small coins are called one-dollar coins, medium coins are called ten-dollar coins, large coins become hundred-dollar coins, and large coins are called Qianyun coins.

Militarily speaking, Daqin had completely occupied the bridgehead of the Ryukyu Islands, and had begun to gradually establish ports on the Ryukyu Islands as a bridgehead for overseas commerce.

As for Fusang, Li Chen did not attack for the time being. On the one hand, Fuso is now very obedient, and whether it is the Tokugawa shogunate, the Kamakura shogunate, or the Muromachi shogunate, all send silver mines on time. On the other hand, the main thing is that the current Fusang is really nothing worthy of Li Chen's plot except for silver mines.

It's not that Fuso can't fight, but what do you want to hit him at this stage, and can he experience the excitement of the earthquake from time to time?

If Fusang is laid, then it is inevitable to invest in construction, and the most important thing is to build Fusang, which will divide the resources of Daqin.

While the two carriages of military and economy are advancing rapidly, Daqin's technology can be said to have been plugged in. It seems that it is impossible to describe Daqin's scientific and technological progress with rapid progress, and it should be more appropriate to describe it with wings and forward.

Li Chen has always attached importance to science and technology, because he understands in his heart that science and technology are the primary productive forces. As long as the technology is strong enough, then the speed at which Great Qin can move forward will be even faster.

On this day, Li Chen happened to be resting and was playing with his three children at home.

"Brother, brother, which one are you talking about...... Steaming something, it seems to have been studied. The six sons strode towards Li Chen in small steps.

After so many years, Liuzi is no longer the little beggar he used to be. Now he is already a young man, and in two years, his six sons are afraid that they will also get married. This kid seems to have hooked up with the little girl who sells beef noodles at home recently.

Hearing Liuzi say this, Li Chenteng stood up and hurriedly asked, "Steam engine?" ”

"yes, yes, that's the steam engine. Brother Da Niu has been tossing for several years, and finally came out. Liuzi said hurriedly.

"Let's go, let's take a look." Li Chen hurriedly said.

Li Chen trotted all the way to Da Niu's laboratory, only to see Da Niu tinkering with this heavy piece of equipment cast in iron. This thing is the steam engine of the previous life, and the steam engine as a whole is composed of cylinders, bases, pistons, crank connecting rods, flywheels and other parts.

In a steam boiler, water is boiled into steam through the combustion process. Through the pipes, the steam is sent to the cylinder. The valve controls the time when the steam arrives at the cylinder, enters the slide valve chamber through the main steam valve and the throttle valve, and is controlled by the slide valve to alternately enter the left or right side of the cylinder to push the piston to move. The steam pushes the piston inside the cylinder to do work, and the cooled steam is introduced into the condenser through the pipe to re-condense into water. During this process, the steam machine repeats its movements constantly.

A general steam engine has three cylinders forming a group. The steam engine directly converts the up and down motion of the piston into the rotational motion of the ship's shaft. The new steam engine also contains a small turbine, and the steam coming out of the cylinder can also use its waste heat to propel the turbine to improve the efficiency of the entire drive. This turbine is also connected to the ship's propeller shaft.

At this time, the steam engine was putting carbon into it for a day. Da Niu actually took an egg and put it on the steam, and the egg rose and fell in the steam.

"It's a fucking city that can play." Seeing that the big cow was having fun, Li Chen laughed and scolded in his heart.

"Generalissimo."

"The Generalissimo is here." Seeing Li Chen coming over, a group of onlookers greeted each other.

"Hmm." Li Chen replied softly as he walked over to the steam engine.

"Generalissimo, I made this thing, but I don't know if it's the right thing to do?" Da Niu pointed to the steam engine beside him and asked with some suspicion.

Li Chen circled around the steam engine several times, and couldn't help but exclaim: "Yes, yes, it's just too much." Looking at the steam engine in front of him, which was more than three meters high, Gao Fei estimated that this thing could pull a train, but it would definitely not be a problem to pull a carriage.

Li Chen looked at the steam engine and then at the big cow. I really can't imagine that this rough man who can't read a basket of big characters can actually make such a precise thing. Sure enough, the kind of great country craftsmen in the previous life are real.

(The following is not, etc. will be revised.) ）

In the Sui Dynasty, in the winter of the fifth year of the Great Cause, in the city of Jiangdu, the goose feathers and heavy snow were still fluttering, and in the blink of an eye, a finger thick snow had accumulated on the road.

This should be close to the end of the year, Li Fei is obviously a little uncertain about this time. He's a foreigner, an outsider. This is the fifth day that Li Fei has come to this inexplicable world, and with the good quality down jacket on his body and the bag of Oreo and a bottle of fat house happy water in the down jacket, he has been holding on for five days. These days, the down jacket is a little tattered, and the things are gone. He has reached the time of hunger and cold, and it is time to bend his waist for five buckets of rice.

Thinking of this, he put in front of him the broken bowl that the beggar next door gave him a few days ago.

People are all princes and nobles, and no matter how bad they are, they are also sons and brothers, rich men or something.

I, Li Fei.

Crossing, beggar, how does this make me mix among the many traversers, is my little Ah Fei shameless?

What about the grass mud horse, the thief God, Lao Tzu's system? What about Lao Tzu's grandfather? That's not how middlemen make the difference, your TM is blacker than melon seeds.

It was the end of the year, in fact, Li Fei didn't know if it was the end of the year, anyway, looking at these people who braved the heavy snow to buy New Year's goods, he estimated that the end of the year should be approaching. The streets and alleys of Jiangdu City are lined with some unknown trees, and the branches of the trees are covered with silver snowflakes on heavy snowy days, which at first glance look like small crispy meat covered with breadcrumbs.

Hungry, Li Fei observed the pedestrians coming and going on the street, and then, he was even hungrier. Do you have a sense of public morality, can you not pass by Lao Tzu with meat. The damn incense was so fragrant that Li Fei felt that the ghosts in his stomach were making trouble, and everyone had hungry ghosts in their stomachs.