diff --git a/book.toml b/book.toml
index 2d351fa..2486636 100644
--- a/book.toml
+++ b/book.toml
@@ -11,6 +11,7 @@ additional-css = ["theme/pagetoc.css"]
 additional-js  = ["theme/pagetoc.js"]
 git-repository-url = "https://github.com/gnu4cn/rust-lang-zh_CN"
 git-repository-icon = "fa-github"
+input-404 = "not-found.md"
 
 [output.html.print]
 enable = false
diff --git a/src/not-found.md b/src/not-found.md
new file mode 100644
index 0000000..9d68488
--- /dev/null
+++ b/src/not-found.md
@@ -0,0 +1,2 @@
+抱歉，此 URL 无效。请使用导航栏或搜索继续。
+<script\>console.log("test embedding javascript in markdown file.");</script\>