diff --git a/docs/en/api-guides/classic-bt/index.rst b/docs/en/api-guides/classic-bt/index.rst
index 873af279e4..7c8195bca6 100644
--- a/docs/en/api-guides/classic-bt/index.rst
+++ b/docs/en/api-guides/classic-bt/index.rst
@@ -8,6 +8,6 @@ Classic Bluetooth®
 Overview
 *********
 .. toctree::
-   :maxdepth: 1
+   :maxdepth: 2
 
    overview
diff --git a/docs/zh_CN/api-guides/ble/overview.rst b/docs/zh_CN/api-guides/ble/overview.rst
index 41463cc37f..fb124c4f45 100644
--- a/docs/zh_CN/api-guides/ble/overview.rst
+++ b/docs/zh_CN/api-guides/ble/overview.rst
@@ -1,5 +1,5 @@
 介绍
-------
+=======
 
 :link_to_translation:`en:[English]`
 
diff --git a/docs/zh_CN/api-guides/classic-bt/index.rst b/docs/zh_CN/api-guides/classic-bt/index.rst
index a1806a02ec..57aba1ca5d 100644
--- a/docs/zh_CN/api-guides/classic-bt/index.rst
+++ b/docs/zh_CN/api-guides/classic-bt/index.rst
@@ -8,6 +8,6 @@
 概览
 *****
 .. toctree::
-   :maxdepth: 1
+   :maxdepth: 2
 
    overview
diff --git a/docs/zh_CN/api-guides/classic-bt/overview.rst b/docs/zh_CN/api-guides/classic-bt/overview.rst
index 4f0b22a80c..c090d81056 100644
--- a/docs/zh_CN/api-guides/classic-bt/overview.rst
+++ b/docs/zh_CN/api-guides/classic-bt/overview.rst
@@ -1,5 +1,5 @@
 介绍
-------
+=======
 
 :link_to_translation:`en:[English]`