"If you have time, please advise more. Your brother's bad temper must be changed, otherwise he will offend others without knowing it. If there is any mistake in the future, he will not ask someone to say good things, but please don't take any trouble."

"Yes, I know."

"Don't be perfunctory. That's your brother, not my brother. You should worry about you. You are so soft-hearted and reluctant to let go of your stern face. In the future... let it go here, let it go!!"

"oops...."

In the study, Yu Wen Wen was fiddling with the model train, and Xiao Jiuniang was helping. The night was dark outside, and it was snowing heavily. The room was warm as spring because it was turned on.

The two of them talked while posing models, talking about Xiao Jiuniang's younger brother Xiao Yu.

Xiao Yu is now in the Ministry of Personnel. Because of his strict and rigid handling of things, he often argues with his colleagues over official duties, and then becomes a quarrel, which invisibly offended many people.

This temper will cause trouble sooner or later in the officialdom. If it were someone else, Yuwen Wen would be too lazy to pay attention to it. However, this is Xiao Jiuniang's younger brother, so he has to care about it.

Today, Xiao Yu had an argument with his colleagues while working. When the quarrel was arguing, others could not persuade him. This matter was soon known to Yuwen Wen, so he wanted to remind Xiao Jiuniang: Do you know that your brother is so "smooth" to be an official?

Yuwen Wen put the train model on the iron track and continued: "Really, you really have to persuade. Your brother's hot temper can easily offend people."

"I know..."

Xiao Jiuniang said that, but she felt helpless. Her younger brother Xiao Yu had the same temper. She said this as a sister many times, but Xiao Yu always "yes, yes, yes", and still did his own thing afterwards.

I can't say much, after all, my brother did it right on the surface: he is upright, who can say that he is wrong?

However, those who sell the market are easy to break, while those who are bright are easy to be dirty. In the officialdom, if you act too ruthlessly, you will be really unlucky. Of course, Xiao Jiuniang doesn't want Xiao Yu to be unlucky.

She felt that Yuwen Wen is the emperor now, and no matter how unlucky Xiao Yu was, he would not be unlucky. At worst, he would lose his official position and return after avoiding the limelight. However, his younger brother is younger than Yuwen Wen. In the future, Yuwen Wen will "collapse" in the future. It is hard to say whether the new king will take care of his younger brother, an "old minister of the previous dynasty".

"Hey hey! I made the wrong place again!"

Yuwen Wen's shout made Xiao Jiuniang come to her senses, and quickly followed Yuwen Wen's instructions and carefully placed the "train car" on the rails.

The rails used in the model train are only three fingers wide, and this model train, the "locomotive" and the carriage are connected in series, but the arms are long and the wrists are thick, which is actually a toy.

Xiao Jiuniang assisted Yuwen Wen to arrange the model train. Watching Yuwen Wen ignite the "locomotive" for a while, the train "roared" and kept circled along the circular rails.

This "train" is really magical. In Xiao Jiuniang's view, it is comparable to the steamship propeller-driven by the propeller. It also uses "steam power" to move. The difference is that one walks in the water and the other runs on the ground.

The propeller ship model and the train model appeared at the same time. Yuwen Wen made it before he became emperor. Xiao Jiuniang still remembers the scene where Yuwen Wen fiddled with these two models in the royal palace.

However, more than ten years have passed, and the propeller-propelled steamship was finally built, but the train has not been seen below.

Faced with Xiao Jiuniang's doubts, Yuwen Wen replied: "There are not many technical problems at all when developing a train. Don't look at the model running happily, that's two different things. The development is too difficult, so the development in the near and medium term is not cost-effective, so it will definitely be chosen as a breakthrough for the steamship."

He pointed to the model rail and asked, "Do you know, if you want to lay a mile of railway, how heavy is the rail?"

Xiao Jiuniang didn't know where she shook her head.

"The railways that are very heavy, and hundreds or thousands of miles often consume a lot of iron. With the current iron production of subways, it cannot support large-scale railway construction at all."

"At that time, the railway from Daye to Xiakou was built in Ezhou and the Xiuguang Huang Railway in Huangzhou was built. Because the carriages were running on it, it was not heavy, so it was not important to have thinner railways. If you want to build a railway that can run trains, the weight of each railway would be increased by at least 30%.

"The construction of a railway is very iron-consuming and costly. If a steam train is really practical, if you want to rely on trains to transport personnel and supplies, you have to build a railway first. How many years will it take to complete a railway that costs thousands of miles?"

"After the railway is completed, it still needs to be maintained. The cost will not be low, and people have to be arranged to protect the road. Otherwise, as long as a section of railway tracks in the middle is taken away by the stolen iron, the entire line will be paralyzed."

Yuwen Wen used simple and clear words as much as possible to popularize Xiao Jiuniang's choice: if the steamer (padwheel, propeller) and the train can be manufactured at the same time, promoting the steamer is more convenient and costly than promoting the train.

Because the steamer can sail in rivers after it is built, as long as the water level allows, the steamer can go to any river.

After the train is built, the railway must be paved. With the current finance and iron-making capacity of the country, it is impossible to build a large-scale railway.

The Yangtze River and the Yellow River run across the east and west, with a span of more than 4,000 miles. Steamers can sail directly in the rivers and transport personnel and supplies.

What about the train? The imperial court had no financial resources and sufficient iron production to build a railway with a span of more than 4,000 miles from east to west, let alone two.

Besides, the combined length of the two canals, Yongji Canal and Tongji Canal, is 4,000 miles. When constructing, only digging soil is required, no iron smelting or laying railways. The subsequent maintenance cost is much lower than that of maintaining railways.

Also, if a river is wide enough, the two ships sailing opposite directions can not interfere with each other and move in staggered directions, but the train cannot: a railway is like a single-plank bridge, opposite a train, one of which must be avoided.

This involves train scheduling, which will also increase considerable costs.

Therefore, the cost of promoting a steamship is much lower than that of promoting a train.

Apart from this, it is a technical issue.

To rely on "steam power" to achieve breakthroughs in transportation modes, new steam-powered transportation must be provided. If this kind of transportation means wants to "go" fast, enough steam must be generated inside to ensure sufficient power.

In other words, the steam boiler should be large and the cylinder diameter of the steam engine should be large (or the number of cylinders is large).

Adding various transmissions will inevitably lead to a sharp increase in the weight of the power device, so the problem arises: the added weight of the power device will offset a part of the power it provides.

If it is a boat, because the hull can be made very large, the water has buoyancy, and the sails can also be used, so even if the marine steam power unit is heavy and large in size, this problem is not very obvious, but the train cannot do it.

If a train wants to move, it depends entirely on its own power. The weight and volume of the steam boiler and cylinder used in the train are limited, otherwise its weight will consume most of the "power" it generates. Even if it can move, its movement speed will be very slow.

The train has more stringent weight and volume requirements for the steam boiler and steam engine, and there are more technical difficulties. Therefore, after weighing the pros and cons, Yuwen Wen planned the technological breakthrough direction that year, and the result of choosing one of the two was to choose a steamship.

First realize paddle wheel propulsion, then realize propulsion.

Facts have proved that this choice is correct. Otherwise, if the train was chosen as a technological breakthrough, it would be possible that even a locomotive with a speed of 40 miles per hour would not be able to build.

Not to mention building a railway that is thousands of miles long.

Hearing this, Xiao Jiuniang understood, and Yuwen Wen said, the topic turned to Xiao Yu: "Of course it's right to be honest, but you don't act like an official like this."

"If you deal with official duties, you don't agree with your colleagues. There is no need to slap your beard and stare. If you have something to say, why bother to make arguing!"

Xiao Jiuniang was a little silly when she heard this: "He is not quarrel, he is just impatient, and he came up unknowingly..."

"However, if you have reason, you don't have to speak loudly. Even if you are a debate, you have to rely on arguments, rather than loud voices. Some things are not a choice between right or white. The handling of many things is not to say that someone is right, and the other person is wrong."

Sometimes Yuwen Wen talks endlessly, and the more others talk back, the more they talk. Xiao Jiuniang knows this, so she keeps nodding like a chicken pecking at rice.

The train circled the rails and stopped after running out of fuel, but Yu Wenwen's speech was still not over.

He looked at Xiao Jiuniang with a down-eyed look, and suddenly asked, "Have you heard it clearly?"

"Yeah..." Xiao Jiuniang answered subconsciously, and she felt something was wrong after answering.

"Okay, I'll repeat what my husband said just now." Yuwen Wen stared at Xiao Jiuniang and looked stern: "Just say something about it."

"Uh..." Xiao Jiuniang was embarrassed now. Yuwen Wen said so much. She thought it was long-winded and didn't listen carefully. How could she remember what she said?

"Hey, your brother and sister are really born into the same womb, right? When you talk to your brother, he is so absent-minded, right?"

Xiao Jiuniang became anxious when she heard this: "No, no, Erlang, I have always listened very carefully."
Chapter completed!