Toyosu.

It is bordered by the Turks to the north, Shuofang to the west, and Yunzhong to the east.

It is located in the hinterland of the Hetao Plain of "the Yellow River is harmful, only one set of riches", and the top of the big "several" character.

This is almost the northernmost border of the Tang Dynasty, just a few years ago, not long ago, by comparing the satellite maps of later generations, it can be known that this should be the area of Wuyuan County in Inner Mongolia in later generations.

From the imperial capital of Taiji to Fengzhou, there is a distance of 1,000 kilometers in a straight line alone.

Bai Yuqi, who put on the vest of "Xuanqi Xingjun", rushed to the border as soon as possible.

Be prepared to receive the dragoon guards who incarnate as a "dragoon mercenary group" and go deep into the hinterland of the Turkic steppe and notify the disaster-stricken "Jiuli brothers" to take refuge in the south.

It has been marched in a straight line as much as possible, but it still can't avoid the twists and turns that have increased a lot of distance, and it took several days to arrive at Fengzhou even if it was light and simple.

This is mainly due to the fact that people can stand horses even if they ride for a long time.

In ancient times, horses were not running all the way, and most of the time the horses were wandering forward.

People eat grass, not burn oil, carrying a person of more than 100 pounds and luggage, how far can they run in one breath?

The purpose of riding a horse is only to save the rider's physical strength, not to pursue speed.

Even if Bai Yuqi and they rode all the best war horses, the horses began to get tired and foam at the mouth after running for dozens of miles.

So it's not impossible to say "1,000 a day, 800 at night" or something, but people didn't say that the whole process was run down by one person and one horse?

In ancient times, there was a post station thirty miles away, and the so-called "eight hundred miles expedited" refers to the post station guards, who delivered letters in the form of relays, and the selected post riders were all thin and thin people (a small number of post men who could rebel were not considered).

Horses have very poor stamina, and as a joke goes, those who ride a horse can't run.

It refers to the fact that in the process of marching the troops, the cavalry units are actually unable to outrun the infantry units.

This is the same as the tortoise and hare race, although the cavalry is fast in the short distance, it will eventually be caught up or even surpassed by the infantry (here it simply refers to rushing rather than fighting, even if the infantry can outrun the cavalry, they will be tired and vomit blood, and it is impossible to have combat effectiveness).

So on the first day after departure, Bai Yuqi, who discovered this, gave up the BMW given by Li Shimin, and replaced it with a more unscientific means of traveling:

[Summoning Mount]: Summons a horse composed of Arcanon, which can travel at a constant speed of 60 km/h, and the Arcanon Horse exists for 2 hours/spell level (if it has the corresponding riding skill, the Arcanon Horse can increase the corresponding speed like a real horse);

The most amazing thing about this spell recommended by the system to Bai Yuqi is that it can summon an Arcane horse.

It's about the fact that this horse is made of Olympic energy and can run at a constant speed of 60 km/h without slowing down due to physical exertion!

And Bai Yuqi himself also has the [Basic Riding] skill of [Riding] +250% effect, and he can reach a speed of 150 km/h when he lets go.

In less than ten hours, he can run from the Taiji Imperial Capital to Fengzhou, and he can ride a horse to catch shrimp households!

Anyway, the Aoneng horse consumes Acang, and it can't be ridden no matter how much it is tossed, at most, the energy consumption is too large, resulting in a shortened existence time.

So once you have a good time, Bai Yuqi can even control the Aoneng horse and run out of the effect of four-hooves drifting!

However, a speed of 150 km/h is only a theoretical value, and it is important to remember that he is not living in a time when future generations have developed a well-developed transportation network.

And in order to reach Fengzhou in a straight line as much as possible, Bai Yuqi took not a ready-made road, not to mention barren mountains and mountains along the way, and ditches and rivers blocked the road.

Bai Yuqi actually has to move forward while building roads, otherwise why did it take several days for you to rush to Fengzhou at a speed of 150 kilometers per hour?

The main reason why they are in such a hurry is to seize the great opportunity of the grassland white plague, and secondly, to avoid being caught up by the large army behind......

This time, [Wujimen] poured out of the nest, and Bai Yuqi took out the "magic transformation black technology" researched some time ago, a steam truck!

This is a steam truck with a steam engine developed by combining the technology of "construction" and "mechanics".

Filling 100 kg of coal in the no-load state can run nearly 200 kilometers at a "high speed" of 60 kilometers per hour!

However, with a full load of five tons, 100 kilograms of coal can only run a distance of more than 100 kilometers at a speed of 35 kilometers per hour.

Don't look at this steam truck is both bulky and polluting, as soon as it runs, white smoke billows and coal ash is flying, and it has to be followed by special fuel trucks and water supply trucks, and every few hundred kilometers has to stop for a comprehensive overhaul to prevent parts from wearing and adding lubricating oil (animal fat), and the operating efficiency is not comparable with that of later vehicles.

However, for Datang, this is the first fully mechanized fleet, as long as the fuel is sufficient, it can "travel thousands of miles a day".

This thing was originally prepared by Bai Yuqi for the "Southern Land Transportation Network" to be opened at that time, but he didn't expect that the roads in the south had not yet been repaired, but it was first used in the "rescue plan" in the north.

Therefore, in order to prevent this steam convoy from catching up with him, Bai Yuqi could only rush to the front single-handedly to repair the road.

Originally, it was not in Bai Yuqi's plan to build the road himself, but considering that the situation was more urgent this time.

And he also wanted to test his ability to cast spells after leaving the [Arcane Particle] high-concentration environment, and how much it would be affected, so he would do this hard work.

But what he didn't expect was that the [Arcanon Particle] environment had a much greater impact on him than he imagined!

Within 10 km of the Tai Chi Imperial Capital, the cast effect is almost unaffected.

After leaving the Taiji Imperial Capital area, every 10 kilometers of outward extension, the spell effect will drop by 10%, and the cost will increase by 10%.

When you are 100 kilometers away, every 10 kilometers you stretch outward, the spell effect will decrease by 100%, and the cost will also increase by 100%.

When he is more than 200 kilometers away, he can barely feel the presence of [Arcane Particles], and can only rely on his own accumulated Arcane Energy to release spells.

As a result, Bai Yuqi, who currently only has 100+300 Arcanon Points, releases a full-efficiency spell that superimposes various specialty effects such as "Enhanced, Advanced, Advanced, Advanced, Strong, and Extremely Effective", which requires the consumption of 144 Arcanon quotas, but it can only affect 4050 cubic meters of rock or dirt!

In other words, even if he only paved a 10-meter-wide and 0.2-meter-thick rocky pavement, he could only pave a distance of 2,025 meters by releasing a spell once, and if he released two spells, he would basically consume most of his stored [Arcane Particles].