Liu Mu said: "Then they don't pay attention to treating phosphate rock with sulfuric acid and then turning it into phosphate fertilizer to improve the yield per mu?" ”

"The Ministry of War gave a large sum of money to the Qinghe Temple of Daomen to fund various studies of the Qinghe Temple. In the eyes of the Ministry of War, the science of chemistry is all kinds of magical explosives, or poisons to kill the enemy. Qingheguan expected to be able to come up with a stable glycerin gunpowder within a year, and now they mixed it with some kind of ore powder to turn it into a lump, and then detonated it by charcoal gunpowder, which is very powerful. ”

Li Shimin's words made Liu Mu cry and laugh.

Liu Mu said: "Second brother, a good medicine to cure diseases and save people has become a sharp weapon of the military department again." ”

"Not necessarily, in the use of mining in the mountains, it is still beneficial to the country and the people." Li Shimin will not mention anything that will help the war.

After finishing speaking, Li Shimin asked again: "What other interesting objects are there in Huayuan?" ”

"Huayuan has nothing to use for the war department." Yanagi would never have linked the various studies of Huayuan to the war.

Li Shimin smiled and only said, "I'll go to Huayuan tomorrow." ”

What is Huayuan, for the high-level nobles of the Tang Dynasty, it will always be a mystery.

Ordinary people in Chang'an don't care much about it.

The next day, there were only Li Shimin, Liu Mu, then Dugu Lanruo, and the eldest grandson Wuji, and there were no one else except the guards.

In the north of Jinghe, Li Shimin took the willow wood to the Chang'an North Railway Station.

"The railway on the bridge seems to be more complicated, but fortunately, when the bridge was designed, it was considered to prepare for the train, whether the train entered Chang'an, and the question of whether the train entered Chang'an was discussed for a long time in Shangshu Province, or from time to time Chang'an did not need to cross the bridge, if it was into Chang'an, then how to deal with the city wall."

Li Shimin was not asking Liu Mu's opinion, he was purely stating the situation in front of him.

Liu Mu never spoke, just stood in front of the train and looked at this very strange big guy, the Datang version of the train is very different from the locomotive in his memory.

The main thing is that it's ugly.

There is no sense of streamlining in Liu Mu's eyes, a very thick and clumsy front of the car, and even some hideousness.

"Mighty, this is the important weapon of my Tang Dynasty."

Li Shimin's sudden words made Liu Mu stunned for a moment, and then immediately laughed: "Second brother is so right, how can the fire dragon car not be mighty." ”

Yanagi has nothing but praise for this big and clumsy front of the car.

It is already a miracle for Datang to be able to make such a front car, and his own aesthetics do not represent Datang's aesthetics. Behemoths already have fangs, the popular type is a high-speed beauty, and the hideous sense is a mighty beauty.

While Li Shimin was waiting, two additional carriages had been hung at the station.

Liu Mu said to Li Shimin: "Do you think that the second brother will build a special train?" ”

Li Shimin shook his head: "The Ministry of Rites has written a letter to build a royal special train for my second brother, but I refused." Now is not the time, with Huayuan's production capacity last year can only make two qualified locomotives, this year the number of skilled craftsmen has increased, and the number of machines has also increased, and three can be manufactured. ”

"Actually, it's not less."

The steam locomotive seems simple, but with Datang's current technology, more than ninety percent of the work of the steam engine needs to be completed manually, so the efficiency cannot be improved.

In particular, Datang's current welding process is far from standard, and the steam engines are all riveted.

The emergence of lathes, punches, and planers can help the manufacture of small steam engines, and Datang has not yet been able to mass-produce such super-large steam engines as locomotives.

"Get in the car!" Li Shimin pulled a handful of willow trees that were in a daze.

Two carriages, this is also a small privilege that Li Shimin gave himself as the emperor of the Tang Dynasty, a very small privilege. The very fine woodcut carved carriage is extremely gorgeous.

After sitting in the carriage, Li Shimin said: "I sat once when it was opened to traffic before, and it only takes an hour to get from here to Huayuan bus. I asked the station, and it took an hour and a half to fill the load. ”

Jingyang to Huayuan is only about 140 miles, so the speed of this train is 60 to 70 miles per hour.

Without waiting for Liu Mu to ask, Li Shimin said: "The speed of the passenger car is 135 miles per hour, and the limit speed is twice as high as this during the test. ”

Two hundred and forty miles is sixty kilometers per hour.

Miracle, willow wood can only be described as a miracle.

After Li Shimin finished speaking, he glanced at the eldest grandson Wujian and Dugu Lanruo, at this time the two were looking at the scenery outside the window, although it was not the first time to take the train, but the novelty was still the same.

Seeing that the two women didn't pay attention to this side, Li Shimin approached Liu Mu and asked in a low voice: "After more than a thousand years, how fast is the train that ordinary people take?" ”

"One thousand two hundred miles per hour. But the truck is at most half of this speed, or forty percent. ”

"Oh, so fast?" Li Shimin was very surprised.

Liu Mu said with emotion: "Every year during the Spring Festival, the train has to transport at least two billion people to and from the north and south of the river. ”

A smile appeared on Li Shimin's face, he knew some history, and the train only appeared after 1,200 years in history, and the speed was only ten kilometers per hour, which was half an hour.

Datang also considered preparing to change to a 24-hour system of one day and night, and then sixty minutes per hour, sixty seconds per minute.

However, this requires a process, and the astronomers of the Tang Dynasty are constantly communicating with Rome and doing corresponding research.

There is also the reform of weights and measures, sixteen taels and one pound is no longer suitable, inconvenient to calculate, to consider changing to the decimal system, you can try to change to sixteen dollars and one tael, ten taels and one catty, one hundred catties and one load, and one thousand catties and one ton.

Of course, this also requires a process.

Li Shimin said to Liu Mu: "In my lifetime, I will build a 100,000-mile railway in this world. ”

"Difficult." Liu Mu unceremoniously poured a basin of cold water on Li Shimin.

Li Shimin also understands that railways are a kind of craft, and there are other crafts that need to be improved, such as building bridges and roads.

"By the way, what's in the valley?"

Liu Mu subconsciously replied: "It's not for war. ”

Li Shimin smiled: "Then when you get to Huayuan, let's look at this first, and see what magic is in the valley." ”

Valley.

The heavily guarded valley is even blocked from the sky, with hundreds of roofs blocking the view from above, and no one is allowed to approach the sides of the valley, and this is a no-fly zone for gliders.

Here, Li Shimin only saw a huge light steel skeleton with a length of more than 30 zhang.

"Wood, what is this?"