Return to the Primitive Era and Start a Building Frenzy

When I wake up, human civilization, history, scientific and technological achievements, etc. Have all disappeared, and all mankind has returned to the primitive era. Everyone owns a territory. At the beginning, he builds his own home with a hammer. At the same time, he also faces the invasion of evil and the competition of humans. As an ordinary member, Chen Ran accidentally activated the sign-in system and could sign in every day. "Congratulations to the host for successfully signing in, obtaining a mechanical worker, and improving construction efficiency by 100%!" "Congratulations to the host for successfully signing in. You have obtained a power grid fence to protect your home from intrusion by outsiders." "Congratulations to the host for successfully signing in and becoming a senior engineer..." While others were still building huts little by little, Chen Ran looked at the drawings in his hands and pondered: "Where should the next skyscraper be built?" This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.