diff --git a/app/src/protyle/export/index.ts b/app/src/protyle/export/index.ts
index 6a4cfc985..8ab42b08e 100644
--- a/app/src/protyle/export/index.ts
+++ b/app/src/protyle/export/index.ts
@@ -711,6 +711,7 @@ id="preview">${data.data.content}</div>
       })
     });
 </script></body></html>`;
+    // 移动端导出 pdf
     if (typeof filePath === "undefined") {
         return html;
     }