Worldview: In the near future, nuclear war/extreme climate has caused the world to become a wasteland (or a cyberpunk-style deserted city), with scarce resources and a harsh environment, filled with mutated creatures, predators and weak survivors. There is no emotional line. The heroine is engaged in career, protecting companions, and seeking survival throughout the whole process.
The heroine's design: a time traveler/reborn person (modern engineer/agricultural doctor/veteran), calm and rational, decisive in killing, extremely capable, understands infrastructure/technology/survival skills, not a virgin, not a love brain, her core goal is to establish a safe base, keep herself and her companions alive, and take control of the initiative in survival.
Core cheat: modern knowledge reserves (infrastructure, planting, iron smelting, medical care) + an auxiliary system (optional, such as the "Infrastructure Survival System", which can be exchanged for materials, unlocked technology, no love-related functions) + later awakening survival abilities (such as space storage, environmental purification, auxiliary infrastructure, and does not crush the overall situation).
Purpose: Counterattack against desperate circumstances: From being an orphan on the verge of death, to building a huge survival base step by step, giving you a full sense of accomplishment.