diff --git a/.github/workflows/assets.yml b/.github/workflows/assets.yml
index c90feaaf9..bdbad9e52 100644
--- a/.github/workflows/assets.yml
+++ b/.github/workflows/assets.yml
@@ -35,34 +35,45 @@ jobs:
           echo "Files copied to temp directory (before processing):"
           ls -la temp-b-repo/out/assets
           
-          # 安装lxml库（用于精确控制XML格式）
+          # 安装lxml库
           pip install lxml
           
-          # 生成Python脚本（使用lxml删除注释并控制格式）
+          # 生成Python脚本（修复XML头和注释删除问题）
           echo "from lxml import etree" > remove_xml_comments.py
           echo "import os" >> remove_xml_comments.py
           echo "" >> remove_xml_comments.py
           echo "def remove_comments_from_xml(file_path):" >> remove_xml_comments.py
           echo "    try:" >> remove_xml_comments.py
-          echo "        # 解析XML并保留注释（禁用自动移除注释）" >> remove_xml_comments.py
-          echo "        parser = etree.XMLParser(remove_comments=False)" >> remove_xml_comments.py
+          echo "        # 解析XML并保留原始声明和注释" >> remove_xml_comments.py
+          echo "        parser = etree.XMLParser(remove_comments=False, strip_cdata=False)" >> remove_xml_comments.py
           echo "        tree = etree.parse(file_path, parser=parser)" >> remove_xml_comments.py
           echo "        root = tree.getroot()" >> remove_xml_comments.py
           echo "" >> remove_xml_comments.py
-          echo "        # 递归查找并删除所有注释节点" >> remove_xml_comments.py
-          echo "        for comment in root.xpath('//comment()'):" >> remove_xml_comments.py
-          echo "            parent = comment.getparent()" >> remove_xml_comments.py
-          echo "            if parent is not None:" >> remove_xml_comments.py
-          echo "                parent.remove(comment)" >> remove_xml_comments.py
+          echo "        # 关键修复：删除所有层级的注释（包括非root区域）" >> remove_xml_comments.py
+          echo "        # 遍历所有节点，强制检查注释类型" >> remove_xml_comments.py
+          echo "        for element in root.iter():" >> remove_xml_comments.py
+          echo "            # 遍历子节点的副本，避免修改时索引错乱" >> remove_xml_comments.py
+          echo "            for child in list(element):" >> remove_xml_comments.py
+          echo "                if child.tag is etree.Comment:" >> remove_xml_comments.py
+          echo "                    element.remove(child)" >> remove_xml_comments.py
           echo "" >> remove_xml_comments.py
-          echo "        # 保存修改后的文件，严格控制格式" >> remove_xml_comments.py
-          echo "        etree.ElementTree(root).write(" >> remove_xml_comments.py
-          echo "            file_path," >> remove_xml_comments.py
-          echo "            encoding='utf-8'," >> remove_xml_comments.py
-          echo "            xml_declaration=True," >> remove_xml_comments.py
-          echo "            pretty_print=False,  # 禁用自动格式化（避免额外空格）" >> remove_xml_comments.py
-          echo "            method='xml'  # 确保自闭合标签格式为 <tag/> 而非 <tag />" >> remove_xml_comments.py
-          echo "        )" >> remove_xml_comments.py
+          echo "        # 保存修改后的文件（修复XML头缺失问题）" >> remove_xml_comments.py
+          echo "        # 获取原始XML声明（如果存在）" >> remove_xml_comments.py
+          echo "        xml_declaration = tree.docinfo.xml_declaration" >> remove_xml_comments.py
+          echo "        encoding = tree.docinfo.encoding or 'utf-8'" >> remove_xml_comments.py
+          echo "" >> remove_xml_comments.py
+          echo "        # 写入文件时强制保留XML声明" >> remove_xml_comments.py
+          echo "        with open(file_path, 'wb') as f:" >> remove_xml_comments.py
+          echo "            # 手动写入XML声明（确保不缺失）" >> remove_xml_comments.py
+          echo "            if xml_declaration or xml_declaration is None:" >> remove_xml_comments.py
+          echo "                f.write(f'<?xml version=\"1.0\" encoding=\"{encoding}\"?>\n'.encode(encoding))" >> remove_xml_comments.py
+          echo "            # 写入XML内容，控制自闭合标签格式" >> remove_xml_comments.py
+          echo "            tree.write(f," >> remove_xml_comments.py
+          echo "                encoding=encoding," >> remove_xml_comments.py
+          echo "                pretty_print=False," >> remove_xml_comments.py
+          echo "                method='xml'," >> remove_xml_comments.py
+          echo "                xml_declaration=False  # 已手动处理声明，避免重复" >> remove_xml_comments.py
+          echo "            )" >> remove_xml_comments.py
           echo "        print(f'Processed: {file_path}')" >> remove_xml_comments.py
           echo "    except Exception as e:" >> remove_xml_comments.py
           echo "        print(f'Error processing {file_path}: {e}')" >> remove_xml_comments.py
@@ -101,6 +112,12 @@ jobs:
           echo "Files in B repo target directory after copy:"
           ls -la out/assets
           
+          # 检查是否有实际变更
+          if git diff --quiet -- out/assets; then
+            echo "No changes to sync. Exiting."
+            exit 0
+          fi
+          
           git add out/assets
           git commit -m "Sync assets (no comments): $(date +'%Y-%m-%d %H:%M:%S')"
           git push origin $B_BRANCH || { echo "Failed to push to B repo"; exit 1; }