Bright Sword starts with the grenade flat.

Chapter 315 Decoration is prohibited in the underground city
Naturally, Liu Xiu was too lazy to care about these lazy guys and left them to fend for themselves. Anyway, the planetary engines on their underground city were all from Huaxia District, and Liu Xiu's own people were on duty to run them. With.

For the people in the Feizhou District who live in the underground city under the planetary engine, they only need to be responsible for supplying computers to the underground city. The rest is left to them to manage themselves. Liu Xiu will not be like those in the Mizhou District and Ouzhou District. Like the underground city, people here are dispatched to participate in management and supervision.

When it comes to operational efficiency, it naturally comes down to Huaxia District. Construction started immediately after the vote was passed.

Of course, the construction of this tunnel does not require manual excavation. After all, the distance between each underground city is hundreds of kilometers. If manual excavation is required, how long will it take?

The best and fastest machine for building tunnels is the shield machine. This thing has been very mature forty or fifty years ago. What the workers need is to check the shield machine from time to time to see if there is any problem and to transport the shield machine. It's just a stone made by a machine.

And when the underground city was built, a shield boring machine was used!

However, the diameter of the shield machine used to build the tunnel is not too wide, it is enough to meet the two-way four-lane standard. After all, the wider the platform, the less stable the tunnel will be, and the more reinforcement materials will naturally be needed. , and if it is small, it will also affect the passing performance of vehicles, so it is most appropriate to directly become a two-way four-lane.

Moreover, the smaller the diameter of the shield machine, the faster its tunneling speed. For example, a fast shield machine can tunnel at a speed of five meters in one hour and 120 meters in one day. In one year, it can tunnel It can dig at a speed of thirty or forty kilometers.

However, this was just an ordinary shield machine in the past. When building underground cities, in order to speed up the construction, a laser cutter head was used, which uses lasers to cut rocks. Therefore, its digging speed is much faster than that of ordinary shield machines. Because of the carbide cutter head, the tunneling speed of the laser shield machine can reach more than ten times that of the ordinary shield machine, and it can tunnel three to four hundred kilometers a year.

If it weren't for the troublesome transportation of laser-cut rock and the need to reinforce the rock walls with fixed blocks, the excavation speed would be even faster.

"I won't be reluctant to let go! They all want me to leave! And I also hate them saying that I am a child without parents! So I want to change to a new environment!"

···········
In the underground city of Shanghai No. 1, Liu Qizheng was packing his luggage and said to Han Ziang, who was also packing his luggage:

Not only in just one year, the Shanghai No. 1 underground city where Liu Qi, Han Duoer, and Han Ziang were located was able to open tunnels to the underground city on the Yuping side where Liu Xiu was located.

However, as soon as Liu Qi finished speaking, Han Duoer immediately interrupted:

Therefore, it is not direct from Shanghai Underground City to Yuping Underground City. You need to pass through multiple underground cities in the middle to get there.

Although the distance between Shanghai and Yuping Underground City is more than a thousand kilometers, don't forget that there is not one laser shield machine, and there are many underground cities between Shanghai and Yuping Underground City!

"Oh! Grandpa, you don't need to change your work place. I can do it by myself. Just stay in the dungeon here in Shanghai and take care of Duo'er! Duo'er left the dungeon here. My classmates will definitely be reluctant to part with it!”

At this time, Han Ziang saw Han Duoer saying this, so he said:
"Look, Duo'er has already agreed. What else are you talking about? Besides, I promised your father that I will take care of you until he comes back from retirement!"

When Liu Qi saw that Han Ziang had said this, he didn't say anything more. His original intention of going solo was gone.

Liu Qi, Han Ziang and Han Duoduo actually had nothing to pack. After packing their clothes and some personal belongings, they dragged their suitcases to the station and prepared to set off. As for the house and furniture, I'm sorry, they are all underground city or public property, not private property like before.

Moreover, this house is not allowed to be decorated or modified at will, and people come to check regularly. If neighbors find major changes next door, there are rewards for reporting.

The main reason why we set such a regulation is because we are afraid that some people will do renovations and collapse the entire underground city, and hundreds of thousands of people will die.

After all, before entering the underground city, there were reports from time to time that certain places were renovated without permission, directly knocking on load-bearing pillars and walls, causing the entire building with dozens of floors to become a dangerous building.

So just in case, Liu Xiu made this rule when the underground city was built and ready to be moved in. After all, the underground city also has load-bearing walls and pillars. If the guy got crazy, he would knock these things out. Well, the consequences would be disastrous.

Therefore, any act of destroying walls and columns in a house in the underground city will be regarded as damage to the underground city and endangering the safety of the entire underground city. The consequences will range from being imprisoned to being shot.

The station of the underground city is naturally the entrance to the underground tunnel. In addition to private cars, there are also city buses between the underground city and the underground city.

There is no such thing as a subway or high-speed train, because it is difficult to turn around, and if something happens, you won't be able to escape even if you want to.

Therefore, even the buses that pass through are not particularly large buses, but rather minibuses that can only seat twenty or thirty people.

Of course, these buses and other vehicles are naturally electric vehicles. After years of development, the batteries of electric vehicles have made breakthroughs in terms of safety, energy density and charging speed. However, they are still far from the energy density of hydrogen energy. There is still a big gap, so on the surface, the large mining truck driven by Han Ziang is actually a hybrid hydrogen energy source.

After six transfers, it was not until the afternoon of the next day that Han Ziang took Liu Qi and Han Duoer to the No. 3 Underground City of Periwinkle, which was the dungeon where Liu Qi first appeared in the movie The Wandering Blue Star.

The difference from the movie is that due to food and other issues in the dungeon, only half of the population can live, so it is decided by lottery. Liu Peiqiang joined the Navigator program and became an astronaut of the Navigator, so Liu Qi also Only Han Ziang can live in the No. 3 underground city of Yuping.

But this time, because Liu Xiu solved the food problem, it didn't matter if the underground city was crowded, so Liu Qi and Han Zi'ang naturally lived close to each other in the Shanghai No. 1 underground city.

But this time, because Liu Qi really got the best score in the college entrance examination, ranking first in the world, Liu Qi naturally dreamed of entering the Mecha Research Institute for study and experiment for a long time.

The location of the Mecha Research Institute is in the No. 3 Underground City of Jianping, so Liu Qi naturally had to move here. After all, although Liu Qi was the top scorer in the college entrance examination, it was impossible for the Mecha Research Institute to move because of Liu Qi. To Shanghai Underground City.

As a result, Han Ziang naturally moved here to take care of Liu Qi. After all, there are naturally preferential conditions for talents like the top scorer in the college entrance examination, such as relatives being able to follow him.

(End of this chapter)