In Xiao Yu's plan, the "county" class spacecraft has a minimum weight of 100,000 tons and a length of at least 500 meters.

However, due to the extremely smooth completion of the mission of the mining spacecraft, this made Xiao Yu's raw material reserves more sufficient.

Xiao Yu measured his raw material reserves, and after comprehensive calculation, he planned to build a 300,000-ton "county" class spaceship as his flagship, and the remaining two might as well be a little smaller, and it would be better to build a 200,000-ton one.

With such a large spaceship, it can no longer be built on the ground like the previous spaceship.

The reason is very simple, it's not that the strength of the spacecraft materials is not enough, and it forcibly takes off from the ground and damages the hull or something. But because the volume is too large and the mass is too large, after completion, with Xiao Yu's current level of science and technology, the nuclear fusion fuel carried by the spacecraft will be consumed too much, almost just one take-off will consume one-fifth of the spacecraft's fuel reserves.

Especially in the future, when building a megaton-class "city" spaceship, or a 10-million-ton "provincial" spacecraft, after completion, the spacecraft cannot be within the Loch limit of a massive star at all, otherwise, it will be completely torn apart by the gravitational force of the star.

As for whether the new Erdman-like alloy is capable of resisting the tearing force of this star?

Xiao Yu, who has done experiments on the strength of materials, thinks that this may be no problem, but the shell of the spacecraft is not cast as a whole, and there are various bolt weldings and so on, but these places must not be able to withstand the tearing force.

Then you can only choose to cast the relevant parts of the spaceship on the ground, and then complete the spaceship-related splicing and assembly in space orbit.

Even though Xiao Yu has a large number of mining spaceships, if he wants to rely on the spacecraft to transport the parts, one is that there is too much waste of resources, and the other is that it takes too long to do so.

Whether it is Jin Ye or Xiao Yu, they can feel the sense of crisis hidden behind the solar system, and Xiao Yu can't waste too much energy in the solar system no matter what.

So, Xiao Yu thought of a hypothesis and assumption of scientists in the Earth era, that is, a space elevator, which can quickly transport various parts of the spacecraft to Titan's synchronous orbit with the help of a space elevator.

The principle of the space elevator, simply put, is like a person throwing a large iron chain with an iron ball at the top. The iron ball wants to fly, but it is fixed by the iron chain, and it will not fly away, but will straighten the iron chain.

In the following months, Xiao Yu carried out a lot of demonstration and processing of the space elevator, including the development of the rope that tied the iron ball, and called it the rope of life. After all, if you want to hold a huge space dock factory, ordinary iron chains will never be able to do it.

Xiao Yu strengthened and thickened the rope of life, thickened its diameter to one decimeter, installed a large number of equipment on it, and stationed a large number of robots at the space end of the space elevator to start the construction of the dock.

Of course, the construction of the ground base did not stop, and three days after the completion of the space elevator, the construction of the county-level spacecraft began in full swing.

All kinds of materials were used like flowing water, and in exchange for three large docks that were enough to build 300,000-ton spaceships, as well as 10,000 "village" class spaceships and thousands of "township" class spaceships neatly placed there on the ground, among which the smallest one was the size of the Dawn.

When Xiao Yu's Water Blue Star Fleet was beginning to take shape, Jin Ye was not idle.

The spirit fruit seeds and spirit plants obtained from various worlds were all planted by Jin Ye in the newly opened world, due to the beginning of the world, plus the addition of the ancestor of the world tree, the spirit plants in the world of the Dao Mystery Realm grew very quickly.

The second-generation peach pit was implanted by Jin Ye, and now the peach tree in the secret realm world has flourished with branches and leaves, and the top is like a canopy, as for the branch of the Enlightenment tea tree, it has already matured two batches of tea.

Of course, what Jin Ye attaches the most importance to is the dragon's blood tree, the dragon's blood tree may not have too many other functions, it can't help people to achieve enlightenment, it can't help improve the monk's mana, and it doesn't have the legendary immortal leaf, which can bring people back to life and regenerate their souls, but the dragon's blood tree can replenish people's qi and blood.

The true qi gong method that Jin Ye is practicing now is exactly the set of exercises he created at the beginning, extracting essence from his own qi and blood to refine it into his own true qi, but by doing so, the consumption of himself is unbearable for ordinary people, not to mention others, ordinary people will find that they are deficient in qi and blood after practicing for a few days, and it will be difficult to extract half of the essence from it.

Especially Jin Ye, due to the talent inherited from the deity, Jin Ye's own progress in martial arts practice far exceeded that of ordinary people, naturally, when Jin Ye cultivated this exercise, the consumption of qi and blood was even greater.

Now that he had this dragon's blood tree to replenish his qi and blood, the speed of Jin Ye's martial arts was not affected, but the speed of progress became even faster.

With the replenishment of various spiritual fruits in the space, Jin Ye's cultivation in one day during this period of time is enough to be worth half a year or even a year of ordinary people's cultivation, and Jin Ye now has about two hundred years of cultivation, if Jin Ye is given a steel battle armor at this time, it is a township-level spaceship, and Jin Ye is also confident to wrestle with it.