diff --git a/.github/workflows/cnb.yml b/.github/workflows/cnb.yml
new file mode 100644
index 000000000..b7d67bcc3
--- /dev/null
+++ b/.github/workflows/cnb.yml
@@ -0,0 +1,18 @@
+name: cnb.yml
+
+on:
+  push
+
+jobs:
+  run:
+    if: ${{ github.repository == 'HMCL-dev/HMCL' }}
+    runs-on: ubuntu-latest
+    steps:
+      - name: Mirror GitHub to CNB
+        env:
+          SOURCE_REPO: HMCL-dev/HMCL
+          TARGET_REPO: HMCL-dev/HMCL
+        run: |
+          git clone --mirror "https://github.com/$SOURCE_REPO.git" -- repo
+          cd repo
+          git push --mirror "https://${{ secrets.CNB_SYNC_USERNAME }}:${{ secrets.CNB_SYNC_TOKEN }}@cnb.cool/$TARGET_REPO.git"