diff --git a/reinstall.sh b/reinstall.sh
index 6303f7e..cf65094 100644
--- a/reinstall.sh
+++ b/reinstall.sh
@@ -234,18 +234,23 @@ setos() {
 
     setos_debian() {
         case "$releasever" in
-        12) codename=bookworm ;;
-        11) codename=bullseye ;;
         10) codename=buster ;;
+        11) codename=bullseye ;;
+        12) codename=bookworm ;;
         esac
 
         if is_use_cloud_image; then
             # cloud image
-            ci_mirror=https://cloud.debian.org/images/cloud
+            if is_in_china; then
+                ci_mirror=https://mirror.nju.edu.cn/debian-cdimage
+            else
+                ci_mirror=https://cdimage.debian.org/images
+            fi
+
             is_virt && ci_type=genericcloud || ci_type=generic
             # 甲骨文 debian 10 amd64 genericcloud vnc 没有显示
             [ "$releasever" -eq 10 ] && [ "$basearch_alt" = amd64 ] && ci_type=generic
-            eval ${step}_img=$ci_mirror/$codename/latest/debian-$releasever-$ci_type-$basearch_alt.qcow2
+            eval ${step}_img=$ci_mirror/cloud/$codename/latest/debian-$releasever-$ci_type-$basearch_alt.qcow2
         else
             # 传统安装
             if [ "$localtest" = 1 ]; then