Abstract: Provided are a polishing paste for superfinishing a bearing steel, and a preparation method and use thereof. The polishing paste includes the following components: in parts by mass, 8 parts to 10 parts of stearic acid, 10 parts to 15 parts of a white oil, 15 parts to 20 parts of a liquid paraffin, 3 parts to 5 parts of oleic acid, 3 parts to 5 parts of triethanolamine, and 50 parts to 60 parts of polishing abrasives. The disclosure provides a polishing paste for superfinishing of the bearing steel.

Abstract: A method and apparatus for back-connecting a Bluetooth device, a terminal, and a computer-readable storage medium are disclosed. The method comprises: when a back-connection completion signal of a Bluetooth device is detected, confirming whether the Bluetooth device is a Bluetooth back-connection delay device; when it is determined that the Bluetooth device is the Bluetooth back-connection delay device, starting to count from the time when the back-connection completion signal was detected; and when a preset time has passed since the start of the time when the back-connection completion signal was detected, initiating a media audio protocol back-connection request, wherein the preset time is less than a standard back-connection interval time.