I Am Engaged in Technology in Another World

"Since ancient times, fire can only come from thunder and lightning." "What! Every house in your tribe is equipped with a fire type!?" "A tribe can only be called a big tribe if it has war beasts." "What! What the hell is a Tyrannosaurus rex!?" "Urgent notice! The tribe leader will be out for a few days!" "No, I won't be able to use electricity these days." Su Yi, a young tribe leader with a generator-like function