diff --git a/src/rm_nav/README.md b/src/rm_nav/README.md
index 7f7f050..36e7848 100644
--- a/src/rm_nav/README.md
+++ b/src/rm_nav/README.md
@@ -7,7 +7,7 @@ RoboMaster比赛
 
 
 ros2 launch rm_nav_bringup bringup_sim.launch.py \
-    world:=RC2027 \
+    world:=RMUL2026 \
     mode:=mapping \
     lio:=fastlio \
     lio_rviz:=True \