For the standard of wheel base, the Tang Empire did not impose regulations on the people, theoretically speaking, you can build as wide a carriage as you like.

But today's carriages, most of them are not privately built, many are carriage companies, no matter how bad they are, they are also built by carriage workshops, the carriages they build are all specified, unless there is a special need, otherwise for the market, the carriages they build are the same as the official carriages, and the starting wheel base is one meter four.

After all, the carriage was built for use, and most of it still needs to run on the national highway, if you make it too big, you can't run.

Therefore, under this influence, in fact, folk carriages generally use a wheel base of one meter four.

As a result, although there are various kinds of wheel tracks in the Tang Empire, one meter four belongs to a public standard.

Whether it is a large number of horse-drawn carriages in the military, or freight two-wheeled and four-wheeled carriages in the people, or ordinary two-wheeled or even four-wheeled carriages used by wealthy people, their wheel bases are all one meter four.

Therefore, the official road of the Tang Empire is also based on the wheel base of one meter four to formulate the width of the official road, the wheel base plus the necessary pedestrian space, so the width of the ordinary official road is two meters, of course, this is actually just the ideal standard, in some mountainous areas where construction is difficult, the width of the official road is often only about one meter five or six.

However, it must not be lower than 1.4 meters, and if it is less than 1.4 meters, it will be an unqualified official road, and the official in charge will be criticized.

Some official roads are four meters wide, because some official roads need to meet the needs of two horse-drawn carriages running side by side.

And more than four meters of the official road there are, but relatively few, and not a hard rule, some are military needs, such as Tianjin to Youzhou City, and then to Xuanfu, Datong Mansion official road, this section of the road, is a typical military demand, the minimum standard is six meters, some sections can even reach more than ten meters, and the road is in good condition!

On the one hand, this is because of military needs, and on the other hand, this area belongs to the terrain of the northern plains, and it is easy to build roads.

In the inland areas, if there is no military demand, it is mainly some areas with flat terrain and low construction difficulty, and the financial situation of the place is also relatively good, and there is also this transportation demand, then the official road with a relatively wide width will be built, such as the official road from Shanghai to Hangzhou, which is a six-meter avenue, spacious at the same time, and the road surface is solid and flat.

Northern Zhejiang and Jiangnan are not bad areas, and this place is a plain area that is easy to build, and more importantly, there is a huge demand for material transportation, so there will be this kind of official road that is six meters wide.

The official roads of the Tang Empire, generally speaking, are still in the stage of large-scale construction, and many of them still continue to use the official roads of the former Ming Dynasty, saying that they are two meters and four meters of standards, but in fact, many places have not been expanded at all, and there are only some easy to build, or there are military needs, or local finances are relatively loose places, and the expansion of official roads and new projects have been completed.

However, even if there are some sections of the road, it is still an official road built in the former Ming Dynasty, but it can be used, but it is not so easy to use.

Some of the four supervision groups took boats to go south along the Yangtze River and then went north through the Beijing-Hangzhou Grand Canal, while some directly crossed the Yangtze River and then went north by land.

This is not going to happen, they have to rush to their respective mission destinations to supervise the local officials in flood control, if it is too late, it will be a big problem.

Li Xuan attaches great importance to this flood control and flood control, the leaders of these four supervision groups are all the three products of the Inspectorate, and they are given certain temporary authority, and the Imperial History of the Inspectorate, in the Inspectorate, is originally a member of the province who usually inspects the provinces, not an ordinary official.

They went to the local area, which can greatly deter local officials.

The Inspectorate is responsible for the 'inspection' link, and the guidance is the responsibility of officials sent by other parts of the cabinet, including officials from the Ministry of Agriculture, the Ministry of Industry and other departments, to guide local officials in flood control and flood control in terms of technical details.

After the supervision team went to the provinces, Jinling City was not idle, and many ministers began to mobilize a large number of various materials to go north, especially the vital grain, which was the most important thing.

The Datang Grain Corporation, which is responsible for providing and carrying part of the tasks, issued an order to let its subordinate provincial highway branches prepare a large amount of grain, as well as ships and wagons used to transport grain, and then a large amount of grain began to be transported to the north to strengthen local grain reserves in order to provide timely disaster relief.

Of course, although Datang Grain Corporation is an enterprise under the Ministry of State-owned Enterprises, and it is also a very typical policy-oriented enterprise, it is also an enterprise that operates according to the business model.

It's just that you don't have to give it immediately, you can owe it, and the price is only the lowest cost price.

Grain is being transported to the north, and other materials are also being transported north.

Although the flood has not yet come, the Tang Empire has mobilized almost half of the empire's forces to prepare for flood control.

On May 3, in the capital of Huai'an Prefecture, Ji Lingda, a Taoist from Jiangbei Province, looked at the report in his hand, looked at the heavy rain that was constantly falling outside, and his intuition told him that this time he was in big trouble.

In addition to the weather forecast from the Royal Institute of Technology, there was also a holy decree requiring him to pay close attention to the weather and take measures to prevent floods, and said that the local garrison would help with flood prevention and control work.

If it is only raining locally, then it is not a big problem, although Huai'an Province is in the Huaihe River Basin, but it is in the downstream, if there is no large amount of flood in the middle and upper reaches, it is only the local heavy rain, and the flood control levees in Huai'an Province can still be carried by it.

However, this time it rained not only in Huai'an Province, but in the entire Central Plains, especially in Henan, where it is expected to rain on a large scale, and the rain will collect into the Yellow River, and then continue to flow down the river, impacting the embankments on both banks, plus if it rains locally, then flooding is inevitable.

Immediately, Ji Lingda found his subordinate officials, and then ordered to go down, and the subordinate state capitals immediately organized flood control and flood control work.

Moreover, his instructions are very clear, that is, all localities should immediately organize flood prevention and flood control work, mobilize and conscript local people to urgently strengthen the embankments, dredge the rivers, and at the same time transfer people from flood-prone areas to safe areas.

Regardless of whether it will rain in the middle reaches of the Yellow River, and whether it will rain in other places, it is always right to be careful, not to mention, there is already a clear directive from above, to prevent floods and fight floods.

With Ji Lingda's order, all the prefectures and counties under Huai'an Mansion moved quickly.

Although the Tang Empire has been established for more than ten years, the unification of China is actually a matter of the last seven or eight years, the empire is in the early stage of the founding of the country, and the administrative efficiency is quite high.

Nowadays, the local yamen of the Tang Empire, most of the officials are still working very hard in order to be promoted and for political achievements, because everyone is not stupid, and they all know that in the early years of the founding of the country, it is the easiest time to get ahead, and in a few decades, after the class is solidified, it will not be so easy.

Of course, a large part of the reason for the high administrative efficiency is that most of the civil officials in the Tang Empire are self-trained officials, and these officials are learning all kinds of modernization knowledge, so they have just entered the officialdom and have no practical experience, but the theoretical foundation is basically there, and with a little exercise, he is a qualified official.

Today's scholars and even officials in the Tang Empire are not the scholars who can only do it in the past!

is also a scholar, a former Ming scholar and a Tang scholar, that has become a completely different concept, of course, people are actually the same group of people, but what they have learned is different.

Jiangbei Province took the lead in starting flood control work, while Henan was a little late for a few days, no way, 300 miles or even 500 miles to expedite and fast, it would take time!

By the time the postal department delivered the decree to Henan, it was already several days later.

But the strange thing is that when Xiao Baoguan, the governor of Henan Province, saw this urgent report and holy decree, he felt a little weird!

Want to flood control?

Could it be that I was dazzled by the mistake?

The sun was fierce outside, and even though it was early May, it was already showing signs of midsummer in June and July.

In such a sunny weather, you let us start flood control and flood control, and it is still immediate action without any delay, and at the same time, the scale is also very large, and the whole province must be mobilized.

How could there be a flood in this good way!

However, although there were some doubts in his heart, the content of the weather forecast of the Royal Institute of Technology had to be taken seriously, after all, this was the Royal Institute of Technology, and every report they submitted could not be taken lightly.

Not to mention, the weather forecast was accompanied by a holy decree.

In the holy decree, it was clearly stated that he should immediately mobilize the whole province to carry out flood control and flood control.

Now that he has a report and a holy decree, even if he doesn't believe that there will be heavy rain in the next month, he has to do it honestly, otherwise, not to mention that he can't keep his official hat, he can't even keep his head 100%......

If you don't obey the order, this crime can be big, and the death penalty is the lightest, and it is very likely that it will affect your family!

Today's Tang Empire still retains the system of joint sitting, and some crimes are 'one person commits a crime, and the whole family is beheaded'.

Therefore, whether he believed it or not, whether he wanted it or not, he had to honestly follow the instructions of the holy decree, so as soon as he received the holy decree, he did not dare to delay in the slightest, and immediately ordered the whole province to mobilize for flood control and flood control.

And coincidentally, he just ordered to mobilize the whole body into flood control and flood control on this day, and it began to rain in the evening of the next day, at first it was only a light raindrop, but in the middle of the night it was getting heavier and heavier!

That night, Xiao Baoguan, the governor of Henan Province, stayed up all night because the rain was too big!