"Regular shelter entrance"
"Upgrade Plan One: Increase the thickness of the protective door, enhance the defense of the shelter entrance, add a biochemical radiation decontamination room; upgrade requires 1500 survival points"
"Upgrade Plan Two: Add a shielding door, add a partition door, add a preparation room, upgrade the air intake of the shelter's ventilation system; upgrade requires 1350 survival points"
Seeing these two upgrade plans, Chen Xin, who had already acquired sufficient materials from the SWAT team, didn't consider which plan was more suitable and chose to upgrade everything.
For Chen Xin, who now earns 15 survival points a day, the cost of choosing both upgrade options, with ample materials reducing survival point consumption to 10%, was within his acceptable range.
Chen Xin was surprised that an oxygen generator, which barely consumed a few survival points to make, could provide him with two survival points every day, which exceeded his expectations.
