Abstract: A device assembly system includes a control apparatus, a mobile apparatus, a lifting apparatus, and a plug in/out apparatus. The control apparatus is configured to control, based on an operation and maintenance instruction, the mobile apparatus, the lifting apparatus, and the plug in/out apparatus to complete an operation of the operation and maintenance instruction. The mobile apparatus is configured to move the device assembly system to a first location, and the first location identifies a rack in which a device is assembled. The lifting apparatus is configured to move the plug in/out apparatus to a target location in a first direction. The plug in/out apparatus is configured to place the device to be assembled at the target location, or obtain the device from the target location.

Abstract: Disclosed is a method, apparatus and system for preloading of APP launch advertising, comprising: detecting whether the local advertising cache is null when an APP is launched; if yes, then executing an initialization step; if no, then executing a standard step; wherein the initialization step comprising: entering the homepage of the APP and sending an advertising request to an advertising server; and receiving advertising data returned from the advertising server and storing the advertising data into the local advertising cache; wherein the standard step comprising: displaying the advertising data stored in the local advertising cache and then sending an advertising request to the advertising server; and receiving the advertising data returned from the advertising server.