diff --git a/docs/notes/binder.md b/docs/notes/binder.md
index 7d10c66..56500f5 100644
--- a/docs/notes/binder.md
+++ b/docs/notes/binder.md
@@ -1,4 +1,28 @@
+## Mount BinderFS
+
+#### 1. Manually mount
+
 ```
+mkdir /dev/binderfs
+mkdir /dev/binder
 mount -t binder binder /dev/binderfs
 mount -t binder binder /dev/binder
 ```
+
+#### 2. Auto mount
+
+vim /usr/lib/tmpfiles.d/binder.conf 
+
+```
+d /dev/binder	0666 root root - -
+d /dev/binderfs	0666 root root - -
+```
+
+Add:
+
+```
+binder /dev/binder   binder nofail 0 0
+binder /dev/binderfs binder nofail 0 0
+```
+
+To **/etc/fstab**