docs: simplify

README.md

@@ -2,54 +2,32 @@
 
 # KernelSU
 
-A Kernel based root solution for Android GKI.
+A Kernel based root solution for Android devices.
 
-## Before Reading
+## Features
 
-Now KernelSU supports old kernel under 5.10, but **THERE WILL NEVER** be a CI for old kernels, because they are not generic.
-ANY ISSUES ABOUT HOW TO COMPILE A OLD KERNEL WILL NOT BE ANSWERED AND WILL BE CLOSED.
-
-KernelSU is in a early development stage and you should not put it into production enviroment. KernelSU developers will not be responsible for any of your losses.
-
-If you face any issue, feel free to open a [issue](https://github.com/tiann/KernelSU/issues) and tell us about it!
+1. Kernel-based `su` and root access management.
+2. Module system based on overlayfs.
 
 ## Compatibility State
 
-Now KernelSU will work on these version of kernels without any modification：
+KernelSU officially supports Android GKI 2.0 devices(with kernel 5.10+), old kernels(4.14+) is also compatiable, but you need to build kernel yourself.
 
-- `5.15`
-- `5.10`
-- `5.4`
-- `4.19`
-- `4.14`
+WSA and containter-based Android should also work with KernelSU integrated.
 
-And the current supported ABIs are : `arm64-v8a` & `x86_64`
-
-If you confirm KernelSU works on other version, open a [issue](https://github.com/tiann/KernelSU/issues) tell us about it!
+And the current supported ABIs are : `arm64-v8a` and `x86_64`
 
 ## Usage
 
-1. Flash a custom kernel with KernelSU, you can build it yourself or [download it from CI](https://github.com/tiann/KernelSU/actions).
-2. Install Manager App and enjoy :)
-
-For old kernels under 5.10, you must build custom kernels by yourself.
+[Installation](https://kernelsu.org/guide/installation.html)
 
 ## Build
 
-### Build GKI Kernel
-
-1. Download the GKI source first, you can refer the [GKI build instruction](https://source.android.com/docs/setup/build/building-kernels)
-2. cd `<GKI kernel source dir>`
-3. `curl -LSs "https://raw.githubusercontent.com/tiann/KernelSU/main/kernel/setup.sh" | bash -`
-4. Build the kernel.
-
-### Build the Manager App
-
-Android Studio / Gradle
+[How to build?](https://kernelsu.org/guide/how-to-build.html)
 
 ### Discussion
 
-[@KernelSU](https://t.me/KernelSU)
+- Telegram: [@KernelSU](https://t.me/KernelSU)
 
 ## License