diff --git a/.github/workflows/exe3.yml b/.github/workflows/exe3.yml
new file mode 100644
index 0000000..64995e4
--- /dev/null
+++ b/.github/workflows/exe3.yml
@@ -0,0 +1,13 @@
+---
+name: exe3
+
+on:
+    push:
+        branches:
+            - dev
+jobs:
+    exe3-demo:
+        runs-on: ubuntu-latest
+        steps:
+            - name: reqest pr for dev
+              run: echo "thanks for merging to dev"
diff --git a/README.md b/README.md
index 2eb39ec..ed8261e 100644
--- a/README.md
+++ b/README.md
@@ -1 +1,3 @@
-# git_practice
\ No newline at end of file
+# git_practice
+
+created dev 
\ No newline at end of file