Reveille, known in Chinese as qi chuang hao, is the traditional bugle call used by military forces to wake troops at the start of the day. Played on a bugle without accompaniment, its rising notes have become widely recognised from films, cartoons and morning routines, where they signal that sleep is over. Online, creators use the same short call as a wake-up alarm, a morning intro or a comic way to start a scene. Its simple, official sound still works because everyone understands it instantly.