1. When the boot screen appears, press and hold the volume plus key and the power off key, and let go to resume.
2. Enter recovery, select Chinese, clear data, and clear all data. Recovery mode refers to the mode that can modify the internal data or system of Android. In this mode, you can brush in the new Android system, or back up or upgrade the existing system, or restore the factory settings here. Instrument panel is a rigid flat or structural member used to install instruments and related equipment. According to the form, there are screen instrument panel, frame instrument panel, channel instrument panel and cabinet instrument panel.