diff --git a/README.md b/README.md
index 116a98c73..9199d3707 100644
--- a/README.md
+++ b/README.md
@@ -1,15 +1,5 @@
-# sg200x-evb boards.
+# Milk-V Duo series buildroot SDK V2
 
-step1:
 ```
-git clone -b sg200x-evb git@github.com:sophgo/sophpi.git
-cd sophpi
-./scripts/repo_clone.sh --gitclone scripts/subtree.xml
-```
-step2:
-```
-source build/cvisetup.sh
-defconfig sg2002_wevb_riscv64_sd
-clean_all
-build_all
+./build.sh lunch
 ```