In the more than two months that Cao Chuan went to Earth, Nana followed his orders, continued to accumulate resources, and hollowed out the underground space, so that when he returned, he saw a full 10,000 tons of ore reserves, as well as 5,000 square meters of spacious space.

"It's a pity that I don't have many ways to use them with so many resources, but now, the problem will be improved."

Cao Chuan unloaded 50 tons of materials and transported them back to the lunar base, and the first thing he started was the expansion plan of unmanned units, increasing the number of mining vehicles to 20, the number of small maintenance robots to 10, and adding an additional 10 unmanned aircraft for inspection.

The launch of the circumlunar satellite has greatly improved the quality of sub-communications, and it can also monitor the movement of the lunar surface; More importantly, the ore refining process is divided into multiple automated production lines by using the equipment brought back, which is controlled by Nana, or assisted by a robotic arm or robot, which greatly improves efficiency.

He returned to the breeding area, in addition to the original fungus food, additional potatoes, wheat and other crops, relying on artificial light to maintain the normal growth of crops, and the fixed loosening soil, fertilization, watering and other work directly completed by agricultural robots.

In this way, most of the basic production activities have been automated and unmanned, and hundreds of tons of building materials, hundreds of catties of food, outer armor plates for other unmanned units, metal bones, and even simple industrial products will be produced every day.

To a certain extent, the current productivity of the lunar base has reached the point where he alone cannot consume it at all.

No matter how big the base is, what's the use of no one using it? No matter how many drones there are, what's the use of producing products without buying them? This is also the inevitable difficulty of industrialization, on the planet, if this leads to the destruction of supply and demand, the most serious will lead to economic crises, such as the Great Depression in the early 20th century in the free lighthouse country, a large number of products are rusted and rotted because of the passage of time, or even simply sent to the garbage dump.

And in the lunar base owned by Cao Chuan, even if he encounters this kind of problem, it doesn't matter for the time being, because there is no economic concept in the base, there is no cost, no profit, no merchants, no buyers, resources are unlimited, and it is not worth hurting to waste them.

In order to make the lunar base complete enough, he had to go far enough to increase productivity before stopping, otherwise it would not be enough to support the development of certain areas.

Now that the goal has been achieved and the simple productivity explosion has been completed, the next step is to enrich his product line and try to solve the source of some products that will inevitably be used in development.

Sitting in front of the computer, Cao Chuan listed the necessities that he expected to produce through the lunar base.

"Solid chemical fuels, high-performance composite materials, and solar panels are the three things that cannot be directly produced by the equipment I brought here, and the demand for these is expected to rise sharply in the coming period. Therefore, if the lunar base directly produces these products, it will play a vital role in the development. ”

"Solid chemical fuels are actually a mixture of several materials, including oxidizers, fuels, additives, however, the solid chemical fuels used by rockets on Earth, almost all involve organic matter, and the conventional sources of organic matter are usually oil, natural gas, etc., which are completely absent on the moon, so my goal is to find oxidizers, fuels and additives in the form of inorganic substances.................. The rule simulation was completed in 1655.0 seconds. ”

Not long after, the molecular structure of several new materials appeared in front of Cao Chuan, including magnesium oxide with a certain distribution near the crater, which was used as an oxidant; Hydrogen compounds, which are extremely rare on Earth but commonly found on the Moon, are used as fuels and other additives.

Even if you find a usable material, you have to explore the manufacturing method, if any new material can be easily mass-produced, human technology development will not encounter so many potholes, such as titanium alloys, carbon nanotubes and other materials have long been popularized.

"With the molecular structure of the material, and then looking for laboratory preparation methods, industrial mass production methods, and even large-scale low-cost, low-tech mass production methods, this road can be a long, long way, let's start with laboratory preparation methods.................. The rule simulation was completed in 285.2 seconds."

It didn't take long for Cao Chuan to find the preparation method in the laboratory, and then a few hours of rule simulation, allowing him to find an industrialized mass production method, and a few hours later, the attempt to find a large-scale low-cost mass production method failed, it seems, either the production of raw materials is limited, or the technical conditions are limited, and the conclusion is that his rule simulation has reached the limit.

For the time being, only ordinary industrial mass production can be used, but looking at the use scenarios of solid chemical fuels, focusing on rockets, it can fully meet his needs.

In the workshop, the machined parts of the equipment obtained through various means are assembled and turned into equipment that can produce products, which is the usual definition of production equipment.

Mastering a production equipment is equivalent to mastering the cornucopia of making a fortune, and the technological monopoly of advanced countries on backward countries is more reflected in the monopoly of production equipment, and in order to find production equipment that meets the requirements, backward countries have to pay a huge price to explore, and experience failure again and again.

And through Cao Chuan's rule simulation, you can directly find a shortcut by failing tens of millions of times directly in your mind. It has to be said that the rule simulation ability is a priceless treasure left to him by aliens. Finally, the solid fuel production line was completed.

The remaining high-performance composite materials are going in several directions of high melting point, high hardness, corrosion resistance and radiation resistance, and the existing equipment just produces ordinary aluminum, steel and copper, but in fact, most of the manufactured products of modern civilization will not be such simple materials.

Solar panels are a relatively simple problem, its raw material is monocrystalline silicon, which is also distributed on the moon, and it took less than ten minutes to find the answer, design production equipment, and manufacture, so as to be able to use the current production of almost excess silicate ore to make solar panels.

In the past 3 months, the lunar base is no different from usual on the surface, at most there are a few more ground metal buildings, but if you look inside, you will find that whether it is the original lunar base or the newly opened underground space, it is no longer monotonous and deserted at the beginning, showing a thriving scene.

If there is anything left unfinished before Cao Chuan's next plan, there is one last thing left - to build a real spaceship.