South Gate Four: Echoes of the Star Abyss

In Nanmensi, a small river system hanging alone between the Milky Way of the Republic and Andromeda of the Empire, the universe has never shown its majestic or mysterious side, leaving only endless cruelty, humble struggles, and the trajectory of destiny that is fiddled with by a higher will. It is not a naturally formed star field, but a direct product of the "Great Silence" war 10,000 years ago - a "civilization cemetery" that was completely torn apart by the aftermath of the Level 2 Civilization War, with broken rules and depleted resources. It was in this quagmire of chaos that the Human Republic, a rational utopia that had entered level 1.6 Civilization, launched a grand social-technological experiment of unprecedented scale, long duration, and full of ethical contradictions. The core of this experiment is not military conquest, but "data collection" and "targeted intervention." Every battle in Nanmen IV, every rising hero, every shining mecha, and even every soul wailing or growing in the blood and fire, may be just an entry in the Republic's huge database, another whetstone for polishing its future blades (GUNDAM, J/K series, and even the "None" troop members themselves).