Chapter 2905 China's Standard

And what is the standard for the highest five-star city?

Needless to say, it is completely based on the five main cities of China.

The autonomous ecosystem of the underground city (shelter) in the city can accommodate a permanent population of 5 million people for more than 100 years, and the permanent population can reach 10 million people at ordinary times, and the maximum permanent population can reach 30 million people! This requirement alone has driven many survivor cities in developed countries out of the five-star ranks, because their countries may not have so many people.

But now everyone is using China as the standard.

In addition to this basic living condition, there are some other factors.

The city wall is more than 200 meters high and 30 meters thick. Its strength must be able to withstand the frontal attack of conventional missiles, or the full-strength attack of the eighth-level strongman, and even the attack of nuclear bombs! And have nuclear counterattack capabilities and conventional counterattack capabilities, and have quasi-god-level strongmen stationed for a long time.

It can resist the invasion of a million-level (no quasi-god-level) demon army without support, or persist for 72 hours.

The above is the standard for a five-star city.

It can be said to be quite strict, and the five main cities of China were built according to this standard, and even some of them far exceeded this standard.

After that, developed countries such as the United States also rushed to build according to China's construction model.

China also selflessly provided design drawings, but it is a pity that it is quite difficult to complete such a large project in a very short time.

Because not every country is called a infrastructure maniac like China.

Although wealthy countries such as the United States are targeting five-star cities, in the past half month of the demon invasion.

Only the five main cities of China have reached the five-star city standard! After five stars is four stars.

In fact, it is a drop of about 20% to 40% in all aspects of the five-star ability, such as some particularly demanding requirements, such as the main god-level powerhouse, the underground city shelter has an independent ecological supply model, and can also supply five million people.

Such requirements that are extremely difficult to achieve in other countries have been greatly reduced.

The criteria for a four-star city: the autonomous ecosystem of the underground city (shelter) in the city can accommodate a permanent population of one million for more than 50 years, the permanent population can reach 10 million at ordinary times, and the maximum permanent population can reach 30 million! The latter requirements can still be completed for many buildings on the surface of the city, the most important thing is the construction of the city under the ground, and the other is the extremely high requirement of providing a million people with a living for 50 years.

So far, only ten border cities in China have met this requirement, and other regions are the button city in the United States, the Moco city in the Bear Country, the English city, the French city, and the Roman Holy City built on the Holy Mountain of the Vatican, and the Greek Holy City built by the Greek Temple.

In addition to these, Asia has another four-star main city other than China, that is, Osaka City in the island country.

The appearance of Osaka City was unexpected to some people, but this was a task assigned by Ye Hao to Meiko Higano, and Osaka City was also the base of Meiko Higano's organization.

However, compared with the hundreds of millions of people in the island country, Osaka City, which can only sustain the lives of five million refugees, still seems a little insufficient.

And there is another range, that is, according to the Chinese standard, the underground city's self-ecological supply system must ensure that everyone is well fed.

The standard of these cities is just not to starve to death... Although these foreign four-star survivor cities have a lot of water in them, it is rare to be able to build such a survivor city with the whole country's strength in just half a month.

The other standards are not cut corners.

The height of the city wall is more than 150 meters and the thickness is 25 meters. Its strength must be able to withstand the frontal attack of conventional missiles or the full force of the eighth-level strongman! It has nuclear counterattack capabilities and conventional counterattack capabilities, and has eighth-level strongmen stationed for a long time.

It can resist the invasion of a million-level (no quasi-god-level) demon army without support, or persist for 24 hours.

The three-star survivor cities that followed also continued to reduce by 20% to 40% on this basis.

The criteria for a three-star survivor city: The autonomous ecosystem of the underground city (shelter) in the city can accommodate a permanent population of 500,000 for more than 30 years, with a normal permanent population of 3 million and a maximum permanent population of 10 million! So far, the remaining 15 cities in China have almost all met this requirement for a three-star survivor city.

This is also the minimum standard set by Ye Hao at the beginning. In his opinion, a survivor city under this standard cannot withstand the large-scale attack of the demon army.

Unfortunately, 80% of the survivor cities in the world are below this standard.

Putting aside the three-star survivor cities in China, the number of three-star survivor cities in the world has barely reached more than 20, and the level gap is not small.

These three-star survivor cities are mainly in some developed cities in European and American countries, and they are transformed according to the advanced infrastructure equipment that already exists.

In this regard, it must be said that the island country and the Korean country are much better than those old European countries. Their infrastructure has found a lot of loopholes this time.

Either the equipment is old or in disrepair! Closer to home, the walls of the three-star survivor city are more than 100 meters high and 20 meters thick. Their strength must be able to withstand a frontal attack from conventional missiles, or a full blow from a seventh-level powerhouse! It has conventional counterattack capabilities and has many seventh-level strongmen stationed there for a long time.

Can withstand the invasion of a million-level (no quasi-god level) demon legion without support, or persist for three hours; can withstand the attack of a hundred thousand level (no quasi-god level) demon legion, or Lasted for forty-eight hours.

From this point of view, you can imagine how bad the remaining two-star survivor cities and one-star survivor cities are.

Originally, according to the meaning of Wushuang City and Huaxia, these two levels should not be called survivor cities. They can only be said to be small refuges. To put it nicely, they are survivor bases.

But no matter what, these account for 80% of the number of survivor cities in the world, and most of them are in Asia, Africa, Europe, the United States and other regions.

Some people may be wondering, what about Australia?

Hahaha, after the previous struggles in Australia, almost no one dared to shrink into those small bases, and everyone hid in their large survivor cities.

Australia is vast and sparsely populated, and the original infrastructure is not bad. With the help of the Demon Butterfly Organization, the few survivor cities can barely be regarded as three-star survivor cities. A few have not yet reached three stars and can only be regarded as two-star cities. .