Global Cataclysm: Shelter Is Being Upgraded Infinitely

A sudden snowstorm swept across the world; The secret surveillance of monsters and the intrigues of humans; The mass extinction hundreds of thousands of years ago, the Ice Age is about to happen again! Gu Ming, facing the end of the world, obtained the Heart of Machinery, which allows him to infinitely upgrade his shelter! Light crossbow→mp5-sd silenced submachine gun→electromagnetic rifle Heavy crossbow tower → automatic enemy machine gun bunker → light prism tower Simple workbench → high-precision 3D printer → fully automatic production line Raincoat→radiation protection suit→power armor ... Ps: New book seedlings, please support, updates will be soon. This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.