Recently learning Linux, just your own mobile phone is the android system, so, look at
View phone system information on Android phone desktop point "settings-about Phone"
Below is the development of MIUI 8.0 system based on Andriod6.0 depth customization
As can be seen from the picture: The system is based on the Linux Kernel 3.4.0, and its main version is 3.4. Then open the https://www.kernel.org/releases.html and you can check the
Therefore, it can be learned that miui8.0 is based on Andriod6.0 depth customization of the Android system, Andriod6.0 is based on the development of Linux Kernel 3.4.0, Linux kernel3.4.0 will be sustained maintenance by the core maintainers.
Finally, there is no so-called based on the main, sub-version of the parity to differentiate between the beta and stable version, only the main version, the main version of the master can only go to kernel.org to see if the version will be long-term maintenance.
View the Linux version of the Andiros system