Training scenes are a hallmark of the best old-school Kung Fu movies from across the decades, and the best ones highlight the most important aspects of the genre. Like any niche in movie history, Kung Fu movies have certain tropes that filmmakers can fall back on, but many of these early examples were the first of their kind, introducing the story beats that would go on to become expected. Revisiting and exploring the films of the past can tell a lot about the trajectory of the genre in the future.
Kung fu is a vital part of martial arts filmmaking, and certain martial arts movies are responsible for what the genre is today.