diff --git a/TeXmacs/plugins/account/data/copy_to_zhihu.tex b/TeXmacs/plugins/account/data/copy_to_zhihu.tex
new file mode 100644
index 0000000000..a4d3ed2e12
--- /dev/null
+++ b/TeXmacs/plugins/account/data/copy_to_zhihu.tex
@@ -0,0 +1,5 @@
+\begin{document}
+很抱歉，复制到知乎功能为 Liii STEM 专属。\
+详情请见 \url{https://liiistem.cn/} 注册即送7天会员！\
+已为您按照纯文本格式复制内容。
+\end{document}
diff --git a/TeXmacs/plugins/zhihu/progs/data/zhihu.scm b/TeXmacs/plugins/zhihu/progs/data/zhihu.scm
new file mode 100644
index 0000000000..e7f05fc1f0
--- /dev/null
+++ b/TeXmacs/plugins/zhihu/progs/data/zhihu.scm
@@ -0,0 +1,59 @@
+;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
+;;
+;; MODULE      : zhihu.scm
+;; DESCRIPTION : zhihu data format (export snippet)
+;; COPYRIGHT   : (C) 2026  Liii Network
+;;
+;; This software falls under the GNU general public license version 3 or later.
+;; It comes WITHOUT ANY WARRANTY WHATSOEVER. For details, see the file LICENSE
+;; in the root directory or <http://www.gnu.org/licenses/gpl-3.0.html>.
+;;
+;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
+
+(texmacs-module (data zhihu)
+  (:use (kernel gui menu-widget)
+        (utils edit selections)))
+
+;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
+;; Zhihu format definition
+;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
+
+(define-format zhihu
+  (:name "知乎")
+  (:suffix "zhihu"))
+
+(define (tree->document-stree t)
+  (let ((st (tree->stree t)))
+    (if (and (pair? st) (eq? (car st) 'document))
+        st
+        `(document ,st))))
+
+(define (zhihu-tip-tree)
+  (let* ((latex-code (string-load (unix->url "$TEXMACS_PATH/plugins/account/data/copy_to_zhihu.tex")))
+         (parsed-latex (parse-latex latex-code)))
+    (latex->texmacs parsed-latex)))
+
+(define (zhihu-tree-with-tip t)
+  (let* ((content-st (tree->document-stree t))
+         (tip-st (tree->document-stree (zhihu-tip-tree)))
+         (merged-st (cons 'document
+                          (append (cdr content-st)
+                                  (list "")
+                                  (cdr tip-st)))))
+    (stree->tree merged-st)))
+
+(tm-define (texmacs-tree->zhihu-snippet t)
+  (:synopsis "Export TeXmacs snippet as plain text and append zhihu tip")
+  (texmacs->generic (zhihu-tree-with-tip t) "verbatim-snippet"))
+
+(converter texmacs-tree zhihu-snippet
+  (:function texmacs-tree->zhihu-snippet))
+
+;; Keep "Copy to -> Zhihu" as structured clipboard data (like Ctrl+C),
+;; while appending the zhihu tip content at the end of the copied tree.
+(tm-define (clipboard-copy-export format which)
+  (:require (== format "zhihu"))
+  (let ((temp (clipboard-get-export)))
+    (clipboard-set-export "default")
+    (clipboard-set which (zhihu-tree-with-tip (selection-tree)))
+    (clipboard-set-export temp)))
diff --git a/TeXmacs/progs/init-research.scm b/TeXmacs/progs/init-research.scm
index 246428e718..679bad9b2e 100644
--- a/TeXmacs/progs/init-research.scm
+++ b/TeXmacs/progs/init-research.scm
@@ -345,6 +345,7 @@
 (lazy-format (data tmu) tmu)
 (lazy-format (data docx) docx)
 (lazy-format (data html) html)
+(lazy-format (data zhihu) zhihu)
 (lazy-define (convert images tmimage)
              export-selection-as-graphics clipboard-copy-image)
 (lazy-define (convert rewrite init-rewrite) texmacs->code texmacs->verbatim)
diff --git a/devel/201_99.md b/devel/201_99.md
new file mode 100644
index 0000000000..70e545d790
--- /dev/null
+++ b/devel/201_99.md
@@ -0,0 +1,9 @@
+# [201_99] 社区版选中内容复制到知乎添加提示信息 
+
+## 如何测试
+- 选中任意内容，鼠标右键`复制到`->`知乎`
+- 在`mogan`内粘贴，内容保持不变，在最下面添加提示信息 
+- 在知乎内粘贴和`Ctrl+c`逻辑保持一致，纯文本复制
+
+
+## 2026/03/19 社区版选中内容复制到知乎添加提示信息 
\ No newline at end of file