diff --git a/.gitea/workflows/build.yaml b/.gitea/workflows/build.yaml
index 6c71d32..8f9b673 100644
--- a/.gitea/workflows/build.yaml
+++ b/.gitea/workflows/build.yaml
@@ -26,14 +26,10 @@ jobs:
           chmod 600 ~/.ssh/id_ed25519
           echo ">>> chmod public key"
           chmod 600 ~/.ssh/id_ed25519.pub
-          echo ">>> dns resolve"
-          nslookup focs.gc.sjtu.edu.cn || host focs.gc.sjtu.edu.cn || echo "DNS failed"
-          echo ">>> tcp test"
-          timeout 5 bash -c "echo >/dev/tcp/focs.gc.sjtu.edu.cn/2222" 2>&1 || echo "TCP failed"
           echo ">>> ssh-keyscan"
-          timeout 10 ssh-keyscan -p 2222 focs.gc.sjtu.edu.cn >> ~/.ssh/known_hosts || echo "ssh-keyscan failed"
+          timeout 10 ssh-keyscan -p 2222 focs.gc.sjtu.edu.cn >> ~/.ssh/known_hosts || echo "ssh-keyscan failed, using StrictHostKeyChecking=accept-new"
           echo ">>> ssh test"
-          ssh -T git@focs.gc.sjtu.edu.cn -p 2222
+          ssh -o StrictHostKeyChecking=accept-new -T git@focs.gc.sjtu.edu.cn -p 2222
         # - name: Lint
         #   run: make lint
       - name: Build
@@ -62,9 +58,9 @@ jobs:
           echo ">>> chmod public key"
           chmod 600 ~/.ssh/id_ed25519.pub
           echo ">>> ssh-keyscan"
-          ssh-keyscan -p 2222 focs.gc.sjtu.edu.cn >> ~/.ssh/known_hosts
+          timeout 10 ssh-keyscan -p 2222 focs.gc.sjtu.edu.cn >> ~/.ssh/known_hosts || echo "ssh-keyscan failed, using StrictHostKeyChecking=accept-new"
           echo ">>> ssh test"
-          ssh -T git@focs.gc.sjtu.edu.cn -p 2222
+          ssh -o StrictHostKeyChecking=accept-new -T git@focs.gc.sjtu.edu.cn -p 2222
       - name: Set up Git
         run: |
           git config --global user.name "bot-joj"
diff --git a/.gitea/workflows/submodule.yaml b/.gitea/workflows/submodule.yaml
index dba8c2b..28da2bb 100644
--- a/.gitea/workflows/submodule.yaml
+++ b/.gitea/workflows/submodule.yaml
@@ -23,14 +23,10 @@ jobs:
           chmod 600 ~/.ssh/id_ed25519
           echo ">>> chmod public key"
           chmod 600 ~/.ssh/id_ed25519.pub
-          echo ">>> dns resolve"
-          nslookup focs.gc.sjtu.edu.cn || host focs.gc.sjtu.edu.cn || echo "DNS failed"
-          echo ">>> tcp test"
-          timeout 5 bash -c "echo >/dev/tcp/focs.gc.sjtu.edu.cn/2222" 2>&1 || echo "TCP failed"
           echo ">>> ssh-keyscan"
-          timeout 10 ssh-keyscan -p 2222 focs.gc.sjtu.edu.cn >> ~/.ssh/known_hosts || echo "ssh-keyscan failed"
+          timeout 10 ssh-keyscan -p 2222 focs.gc.sjtu.edu.cn >> ~/.ssh/known_hosts || echo "ssh-keyscan failed, using StrictHostKeyChecking=accept-new"
           echo ">>> ssh test"
-          ssh -T git@focs.gc.sjtu.edu.cn -p 2222
+          ssh -o StrictHostKeyChecking=accept-new -T git@focs.gc.sjtu.edu.cn -p 2222
       - name: Set up Git
         run: |
           git config --global user.name "bot-joj"