Generally, there are META-INF (the folder of the signature and script of the brush package), system (the whole mobile phone system and its own software folder), data (the user folder is optional, and the installation software in this file can be uninstalled manually) and a boot.img file.

Signature verification file generally means that you can see cert.sf and cert.rsa after entering META-INF. This is the signature verification of the brush package. The file in the path of com \ Google \ Android \ updater-script is a brush script. If you modify the mobile phone system file, you need to modify the corresponding script file, otherwise there will be bugs in later use.