Abstract: An operation-indication mode switching structure, a circuit, and a method for operating the same are provided. The operation-indication mode switching structure is disposed on a housing of a device, and includes a switching mechanism that is used to switch multiple operation-indication modes. The switching mechanism is selectively connected with one of multiple signal terminals. When the switching mechanism is manipulated to switch to one of the operation-indication modes, a control unit of the device receives an operation-indication mode switching signal generated by the switching mechanism conducting or circuit-shorting one of the multiple signal terminals. A corresponding operation-indication mode that is a covert mode, a stealth mode, or a normal mode can be determined. The control unit is used to control an indication function of the device according to the operation-indication mode that is switched to.

Abstract: A body-worn camera and an operation method thereof are provided, and the body-worn camera a central processing unit, a video recording module, a turntable, and a main button. The video recording module is electrically connected to the central processing unit. The turntable is electrically connected to the central processing unit. The main button is electrically connected to the central processing unit. After the video recording module completes recording a video, when the central processing unit receives a category mode signal from the turntable and receives a category name confirmation signal from the main button, the central processing unit executes a video tagging program, and the video tagging program saves a corresponding relationship between a category name and the video.

Abstract: A Chinese sexagenary cycle calendar including a calendar stand, a celestial stem ball marked with the 10 celestial stem signs and revolvably supported within a ball socket at a front side of the calendar stand, and 12 individual animal pictures and one 12-animal table arranged in a loose-leaf manner and fastened to the calendar stand by a coil, the 12 individual animal pictures showing respectively the 12 animals of the 12 Terrestrial Branches and respectively marked with the 12 terrestrial branch signs, the 12-animal table comprising 12 animal blocks showing the 12 animals of the 12 terrestrial branches and marked with the 12 terrestrial branch signs respectively.