Global Cataclysm: I Checked in to Upgrade in the Shelter

The sun's spot erupted, a meteorite with a diameter of ten kilometers hit the blue star, and the dust raised covered the sky. The earth's surface became an ice age, prehistoric beasts reappeared, and alien creatures arrived. Xia Feiyun traveled through time and thought that a tragic life was waiting for him, but he didn't expect that the sign-in system was activated. If you sign in anywhere, you have a chance to get rewards. Check in at the safehouse and receive a bonus laser shield. Check in at the power generation room to receive the bonus exoskeleton armor. Sign in in the breeding room and receive the reward gene optimization fluid. Sign in in the utility room and receive a bonus Magnum Capsule. Xia Feiyun quietly checked in and upgraded in the shelter, until one day, alien creatures arrived, Seeing that Blue Star is about to be destroyed, Xia Feiyun's strength is no longer allowed to be adjusted... This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.