diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index 4c8aa17..cadb0df 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -51,12 +51,13 @@ jobs:
       - name: Set file extensions
         run: |
           export FILE_EXTENSIONS=".txt .jpg .png" # 以空格分隔多个文件后缀
+          echo "FILE_EXTENSIONS: $FILE_EXTENSIONS"
 
       # 创建一个备份目录，并将当前目录及子目录中的所有指定后缀文件复制到备份目录，并保持路径
       - name: Backup local files with specified extensions
         run: |
           mkdir -p backup
-          echo "$FILE_EXTENSIONS"
+          echo "FILE_EXTENSIONS: $FILE_EXTENSIONS"
           (for EXT in $FILE_EXTENSIONS; do
             echo "$EXT"
             rsync -av --include="*/" --include="*$EXT" --exclude="*" ./ backup/