Prehistoric Technological Empire

A scam of "faster-than-light flight" brought Jin Xiao to 160,000 years ago. But the people here are not wearing leaf clothes and holding simple tools as the history books say. Instead, watch TV, drink soda, and blow on the air conditioner. . . . . . Wait a minute, why are the cars here running so slow? Why are the patrolling guards carrying spears and crossbows? Also, why are there so many more women than men on the street? Let's see how Jin Xiao uses his knowledge to change this strange world.