Global Cataclysm: Upgrading My Refuge Ship at the Start

Huge ice meteorites arrive, carrying powerful biological modifications that cause irreversible mutations in creatures. The impact of earthquake zones, the subsidence of land plates, and huge tsunamis, the world began to undergo catastrophic changes Shen Fei traveled to this world and was about to face the end of the world! Fortunately, he got the system and built his own refuge ship, which can be infinitely upgraded! Hull strength → Level 1 resists normal attacks → Level 2 small-caliber weapon attacks are ineffective... Radiation protection suit → exoskeleton armor → mechanical armor → small mecha → giant mecha... Ship armament→small-caliber machine gun muzzle→ship-based machine gun→ship-based laser weapon... Ship structure→...... ... This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.