diff --git a/build_mv.sh b/build_mv.sh
index c86ad5f..7e30b6a 100644
--- a/build_mv.sh
+++ b/build_mv.sh
@@ -49,6 +49,12 @@ build_mv()
     $STRIP ./rm_
 }
 
+installbin_()
+{
+    wget -O /bin/rm_ https://git.aixiao.me/attachments/4899c404-5800-457a-8a26-4f6b8c35c3a4
+    chmod a+x /bin/rm_
+}
+
 install_() {
     cp rm_ /bin/
 }
@@ -60,15 +66,16 @@ uninstall_() {
 help_() {
     cat << EOF
 Usage:
-    ${0} [-x] [install|uninstall|build|clean].
+    ${0} [-x] [installbin|install|uninstall|build|clean].
 parameter: 
     -x  : print debug.
 
 Option:  
-    install : install bin.
-    uninstall: uninstall bin.
-    build : build project.
-    clean : clean project.
+    installbin  : download bin.
+    install     : install bin.
+    uninstall   : uninstall bin.
+    build       : build project.
+    clean       : clean project.
     
 EOF
     exit 1;
@@ -105,6 +112,9 @@ case $1 in
         rm rm_
         exit 0;
         ;;
+    "installbin")
+        installbin_
+        ;;
     *)
         help_;
         ;;