Footprints of the Times

Times are like footsteps passed by. Although there are traces left, its traces are slowly erased by wind and sand over time. People of every era are like those footprints. Although they left their footprints in that era, who will remember them after a few more eras? Although the text records their story for a moment, it still cannot perfectly explain a certain era, a certain small town, or even a certain person.