Abstract: A tracking method for a video surveillance system includes: obtaining identification information for a first target object uploaded by a positioning system; obtaining time information and location information for the positioning system at the time the positioning system uploads the identification information; storing the identification information, the location information, and the time information in a preset database to obtain a storage result; and generating tracking information for the first target object according to the storage result.

Abstract: Embodiments of this application provide a near-field wireless communication service processing method performed at a first computing device associated with a social networking application. While running a social networking application, the first computing device detects a near-field wireless communication signal broadcasted by a second computing device associated with a service provider account registered with the social networking application.

Abstract: Embodiments of this application provide a near-field wireless communication service processing method performed at a first computing device associated with a social networking application. While running a social networking application, the first computing device detects a near-field wireless communication signal broadcasted by a second computing device associated with a service provider account registered with the social networking application.

Abstract: Embodiments of this application provide a near-field wireless communication service processing method performed at a first computing device. While running a social networking application, the first computing device listens to a near-field wireless communication signal broadcasted by a second computing device. After detecting the near-field wireless communication signal broadcasted by the second computing device, first computing device processes the near-field wireless communication signal to obtain identification information associated with the second computing device. The first computing device sends the identification information associated with the second computing device to a remote server supporting the social networking application and obtains a preset service page corresponding to the identification information associated with the second computing device from the server, and displays the preset service page within the social networking application on the first computing device.

Abstract: Embodiments of this application provide a near-field wireless communication service processing method performed at a first computing device. While running a social networking application, the first computing device listens to a near-field wireless communication signal broadcasted by a second computing device. After detecting the near-field wireless communication signal broadcasted by the second computing device, first computing device processes the near-field wireless communication signal to obtain identification information associated with the second computing device. The first computing device sends the identification information associated with the second computing device to a remote server supporting the social networking application and obtains a preset service page corresponding to the identification information associated with the second computing device from the server, and displays the preset service page within the social networking application on the first computing device.

Abstract: A tracking method for a video surveillance system includes: obtaining identification information for a first target object uploaded by a positioning system; obtaining time information and location information for the positioning system at the time the positioning system uploads the identification information; storing the identification information, the location information, and the time information in a preset database to obtain a storage result; and generating tracking information for the first target object according to the storage result.

Abstract: The present invention provides a clinical syringe to be rendered useless after being used once. It comprises a barrel with a needle fitting hub, a piston sealingly and slidably fitted within the barrel and a piston rod connected to the piston. The piston head is provided with a resilient detent plug with a slot thereon, and an injection opening is defined at a position of the barrel corresponding to the detent plug, the diameter of which is smaller than the inner diameter of the needle fitting hub. A U-shaped notch is punched at the top surface of the piston head adjacent the detent plug to form a U-shaped tongue. If the piston rod is to be pulled back after the syringe being used once, the piston head would be torn at the U-shaped notch due to the retaining of the detent plug by the bottom surface of needle fitting hub, rendering it incapable of drawing the injection fluid.