I Built a Doomsday Shelter

Doomsday Farming Article "Countdown to doomsday: 2 hours!" "The supplies are being tested and the prerequisites have been met. Do you want to upgrade your shelter?" "The internal circulation system has been upgraded!" "The automated roving robot has been placed!" "The genetically improved soilless culture growing room is now open!" The catastrophe has arrived, walls are rising, and doomsday shelters are quietly being built. Outside the wall, there are earthquakes, tsunamis, typhoons, and zombies. Order has collapsed and the world is crumbling... On top of the wall are machine guns, radars, and infrared sensor laser cannons, creating a steel barrier! Above the wall, the fire of civilization is being rekindled! This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.