Return to Prehistoric Times as a Savage

"Since its accidental discovery last year, the Tea Town ruins have captured the world's attention." "Recently, the unearthing of a large number of exquisite stone tools and pottery has once again sparked heated discussions among netizens globally." "Among these findings, the most talked-about item is this metal file that seems to transcend its time, as if 'it traveled back from the modern era.'" "The material, craftsmanship, and design of this file are almost identical to modern files, yet experts have confirmed it to be an artifact from over ten thousand years ago..." Zhang Tian stared at the picture of the file, his pupils shaking in disbelief: Damn it! Isn't this the file from my hous...