diff --git a/example.dae b/example.dae
index 47798da..58a2a63 100644
--- a/example.dae
+++ b/example.dae
@@ -94,5 +94,7 @@ routing {
 
     ip(geoip:cn) -> direct
     domain(geosite:cn) -> direct
+
+    # Define final as the fallback outbound
     final: my_group
 }
diff --git a/routing.md b/routing.md
index d0e5c73..5cd5e8d 100644
--- a/routing.md
+++ b/routing.md
@@ -72,4 +72,8 @@ domain(geosite:geolocation-!cn) &&
             geosite:category-scholar-!cn,
             geosite:category-scholar-cn
         ) -> my_group
+
+# Customized DAT file
+domain(ext:"yourdatfile.dat:yourtag")->direct
+ip(ext:"yourdatfile.dat:yourtag")->direct
 ```