diff --git a/build.gradle b/build.gradle
index 337bc57..ad1949d 100644
--- a/build.gradle
+++ b/build.gradle
@@ -4,7 +4,7 @@ plugins {
 }
 
 group 'io.github.linwancen'
-version '2.24.0.' + (new Date().format('yyyy.MM.dd_HH.mm'))
+version '2.25.0.' + (new Date().format('yyyy.MM.dd_HH.mm'))
 
 patchPluginXml {
     // The performance of 2019.3 has been greatly improved.
@@ -15,10 +15,11 @@ patchPluginXml {
     changeNotes = """
 <h2>English Change Notes:</h2>
 <ul>
+<li>2.25  Add project-view-tree use xml/html/vue 1st or 2nd line comment
 <li>2.24  Add line-end-comment  Maven pom.xml \${} doc
 <li>2.23  Add line-end-comment  kotlin anno doc
 <li>2.22  Add project-view-tree ollama models blobs comment from manifests
-<li>2.21  Add project-view-tree use JS/TS/Vue "export default" doc for tree doc
+<li>2.21  Add project-view-tree use JS/TS/Vue "export default" doc
 <li>2.20  Add External Comment  support Vue src/router tree doc
 <li>2.19  ★   line-end-comment  support HTML(Vue) Tag/Attr doc since 2022.3.1
 <li>2.18  Add line-end-comment  support injected language like SQL
@@ -68,6 +69,7 @@ patchPluginXml {
 
 <h2>中文更新说明:</h2>
 <ul>
+<li>2.21  增加 文件树注释  用 xml/html/vue 第 1 或第 2 行注释当文件注释
 <li>2.24  增加 行末注释   Maven pom.xml \${} 注释
 <li>2.23  增加 行末注释   kotlin 注解注释
 <li>2.22  增加 文件树注释  ollama models 文件夹从 manifests 获取 blobs 文件注释
diff --git a/src/main/java/io/github/linwancen/plugin/show/lang/XmlCache.java b/src/main/java/io/github/linwancen/plugin/show/lang/XmlCache.java
new file mode 100644
index 0000000..4872c99
--- /dev/null
+++ b/src/main/java/io/github/linwancen/plugin/show/lang/XmlCache.java
@@ -0,0 +1,31 @@
+package io.github.linwancen.plugin.show.lang;
+
+import com.intellij.openapi.project.Project;
+import com.intellij.openapi.vfs.VirtualFile;
+import io.github.linwancen.plugin.show.ext.listener.FileLoader;
+import org.jetbrains.annotations.NotNull;
+import org.jetbrains.annotations.Nullable;
+
+/**
+ * for html, in here because {@code <!--} is based XML
+ */
+public class XmlCache extends FileLoader {
+
+    public static void indexDocToDirDoc(@NotNull VirtualFile virtualFile, @Nullable String doc) {
+        if (doc != null && "index".equals(virtualFile.getNameWithoutExtension())) {
+            VirtualFile parent = virtualFile.getParent();
+            if (parent != null) {
+                @Nullable XmlCache extension = FileLoader.EPN.findExtension(XmlCache.class);
+                if (extension != null) {
+                    extension.fileDoc.put(parent, doc);
+                }
+            }
+        }
+    }
+
+    @Override
+    protected void loadAllImpl(Project project) {}
+
+    @Override
+    protected void loadFileImpl(@NotNull VirtualFile file, @Nullable Project project) {}
+}
diff --git a/src/main/java/io/github/linwancen/plugin/show/lang/XmlLangDoc.java b/src/main/java/io/github/linwancen/plugin/show/lang/XmlLangDoc.java
index a23336c..483b3c4 100644
--- a/src/main/java/io/github/linwancen/plugin/show/lang/XmlLangDoc.java
+++ b/src/main/java/io/github/linwancen/plugin/show/lang/XmlLangDoc.java
@@ -1,12 +1,19 @@
 package io.github.linwancen.plugin.show.lang;
 
+import com.intellij.ide.projectView.ProjectViewNode;
 import com.intellij.lang.xml.XMLLanguage;
+import com.intellij.openapi.editor.Document;
 import com.intellij.openapi.extensions.ExtensionPointName;
+import com.intellij.openapi.project.Project;
+import com.intellij.openapi.vfs.VirtualFile;
 import com.intellij.psi.FileViewProvider;
+import com.intellij.psi.PsiComment;
 import com.intellij.psi.PsiElement;
+import com.intellij.psi.PsiManager;
 import com.intellij.psi.xml.XmlAttribute;
 import com.intellij.psi.xml.XmlTag;
 import io.github.linwancen.plugin.show.bean.LineInfo;
+import io.github.linwancen.plugin.show.bean.SettingsInfo;
 import io.github.linwancen.plugin.show.lang.base.BaseLangDoc;
 import org.jetbrains.annotations.NotNull;
 import org.jetbrains.annotations.Nullable;
@@ -29,6 +36,53 @@ public class XmlLangDoc extends BaseLangDoc {
         return true;
     }
 
+    @Override
+    public @Nullable <T extends SettingsInfo> String treeDoc(@NotNull T info, @NotNull ProjectViewNode<?> node,
+                                                             @NotNull Project project) {
+        @Nullable VirtualFile virtualFile = node.getVirtualFile();
+        if (virtualFile == null) {
+            return null;
+        }
+        @Nullable FileViewProvider viewProvider = PsiManager.getInstance(project).findViewProvider(virtualFile);
+        if (viewProvider == null) {
+            return null;
+        }
+        PsiElement psiElement = viewProvider.findElementAt(0);
+        if (psiElement == null || !"<!--".equals(psiElement.getText())) {
+            Document document = viewProvider.getDocument();
+            if (document == null) {
+                return null;
+            }
+            int lineCount = document.getLineCount();
+            // lineNumber start 0, as 1 <= 1 should return
+            if (lineCount <= 1) {
+                return null;
+            }
+            // because in html 1st line must <!DOCTYPE html>
+            int i = document.getLineStartOffset(1);
+            psiElement = viewProvider.findElementAt(i);
+        }
+        if (psiElement == null || !"<!--".equals(psiElement.getText())) {
+            return null;
+        }
+        PsiElement parent = psiElement.getParent();
+        if (!(parent instanceof PsiComment)) {
+            return null;
+        }
+        PsiElement[] children = parent.getChildren();
+        if (children.length < 2) {
+            return null;
+        }
+        String doc = children[1].getText();
+        // Copyright or copyright
+        //noinspection SpellCheckingInspection
+        if (doc == null || doc.contains("opyright")) {
+            return null;
+        }
+        XmlCache.indexDocToDirDoc(virtualFile, doc);
+        return doc;
+    }
+
     @Nullable
     @Override
     public String findRefDoc(@NotNull LineInfo info, @NotNull FileViewProvider viewProvider, @NotNull PsiElement element) {
diff --git a/src/main/resources/META-INF/plugin.xml b/src/main/resources/META-INF/plugin.xml
index fe4b962..332cdd6 100644
--- a/src/main/resources/META-INF/plugin.xml
+++ b/src/main/resources/META-INF/plugin.xml
@@ -169,6 +169,7 @@ Show doc comment in the Project view Tree, line End, json, other
   </extensionPoints>
   <extensions defaultExtensionNs="io.github.linwancen.show-comment">
     <fileLoader implementation="io.github.linwancen.plugin.show.ext.conf.ConfCache"/>
+    <fileLoader implementation="io.github.linwancen.plugin.show.lang.XmlCache"/>
     <fileLoader implementation="io.github.linwancen.plugin.show.ext.ollama.OllamaModelsCache"/>
   </extensions>