Since it was mature technology from the Daya Civilization, Humanity was able to put it to use directly after understanding and assimilating it, so it did not take much time.
Not long after Lyra led the fleet's three thousand consciousness-linked ships back to rendezvous, Human Civilization began extracting resources from the gaseous planets within the star system. At the same time, it constructed a new interstellar factory centered around Star-Class ships: the Element Synthesis Factory.
It was specifically used to process hydrogen, helium, and other elements extracted from gaseous planets.
Meanwhile, the Energy-Matter Conversion project was soon placed on the agenda, because Element Synthesis Technology was the final piece of the technological puzzle Humanity needed to master Energy-Matter Conversion.
As soon as it acquired this technology, Human Civilization immediately began its Energy-Matter Conversion experiments.
The rough process was to first build an enormous, high-powered Matter Disintegration Ray generator, then use the ray to irradiate Quark Material, breaking it down into basic hydrogen elements. The next step was elemental synthesis, combining hydrogen elements into various needed elements with larger atomic mass numbers, followed by material separation.
With the entire process complete, Humanity could input energy and produce matter.
Humanity had mastered Energy-Matter Conversion.
From that moment onward, as long as Humanity had a star, it would lack no elements. Or rather, as long as it had energy, Humanity could survive.
Even if Humanity were trapped in the Small Universe of the Precursors back then, it could continue surviving indefinitely unless it destroyed itself.
In addition, Humanity used this time to assimilate the technological data obtained from the Daya Civilization and battlefield wreckage, and began research into Force Field Bombs based on that technological data.
On the other hand, when the Daya Civilization learned that Humanity had mastered Energy-Matter Conversion before them,