diff --git a/docs/en/app/bala.md b/docs/en/app/bala.md
index 2cb8850a..cabc5270 100644
--- a/docs/en/app/bala.md
+++ b/docs/en/app/bala.md
@@ -60,6 +60,10 @@ Weight | 56g
+**BALA 的演示 - 巡线**
+
+
+
**BALA Case - Line following using mobile camera**
diff --git a/docs/en/module/sim800.md b/docs/en/module/sim800.md
index 97046a2a..e80ee263 100644
--- a/docs/en/module/sim800.md
+++ b/docs/en/module/sim800.md
@@ -4,9 +4,7 @@
***
-:memo:**[Description](#Description)** :electric_plug:**[Schematic](#Schematic)** 🛒**[Purchase](https://www.aliexpress.com/store/product/M5Stack-Official-In-Stock-GSM-Module-SIM800L-Stackable-IoT-Development-Board-for-Arduino-ESP32-with-MIC/3226069_32843211923.html?spm=2114.12010615.8148356.20.25e96be7xE1y22.html)**
-
-
+:memo:**[Description](#Description)** :electric_plug:**[Schematic](#Schematic)** 🛒**[Purchase](https://www.aliexpress.com/store/product/M5Stack-Official-In-Stock-GSM-Module-SIM800L-Stackable-IoT-Development-Board-for-Arduino-ESP32-with-MIC/3226069_32843211923.html?spm=2114.12010615.8148356.20.25e96be7xE1y22.html)** :clapper:**[相关视频](#相关视频)**
## Description
@@ -80,4 +78,10 @@ Serial2.print("AT+TEST=TXLRPKT,"00 00 01 00 00 AF 80 07 02 00 00 39"");
## Schematic
-
\ No newline at end of file
+
+
+## 相关视频
+
+**SIM800L 的演示 - 拔打电话**
+
+
diff --git a/docs/ja/app/bala.md b/docs/ja/app/bala.md
index 0638894e..2d550004 100644
--- a/docs/ja/app/bala.md
+++ b/docs/ja/app/bala.md
@@ -51,7 +51,8 @@
**BALA デモ - ライントレース**
-
+
+
**BALA デモ - スマホを用いたライントレース**
diff --git a/docs/ja/module/sim800.md b/docs/ja/module/sim800.md
index aaad35e7..ab34bdbc 100644
--- a/docs/ja/module/sim800.md
+++ b/docs/ja/module/sim800.md
@@ -4,7 +4,7 @@
***
-:memo:**[概要](#概要)** :electric_plug:**[回路図](#回路図)** 🛒**[購入リンク](https://www.aliexpress.com/store/product/M5Stack-Official-In-Stock-GSM-Module-SIM800L-Stackable-IoT-Development-Board-for-Arduino-ESP32-with-MIC/3226069_32843211923.html?spm=2114.12010615.8148356.20.25e96be7xE1y22.html)**
+:memo:**[概要](#概要)** :electric_plug:**[回路図](#回路図)** 🛒**[購入リンク](https://www.aliexpress.com/store/product/M5Stack-Official-In-Stock-GSM-Module-SIM800L-Stackable-IoT-Development-Board-for-Arduino-ESP32-with-MIC/3226069_32843211923.html?spm=2114.12010615.8148356.20.25e96be7xE1y22.html)** :clapper:**[相关视频](#相关视频)**
@@ -65,4 +65,10 @@ M5Stackシリーズのコアを使用し、Blockly、Arduino、MicroPythonでプ
## 回路図
-
\ No newline at end of file
+
+
+## 相关视频
+
+**SIM800L 的演示 - 拔打电话**
+
+
diff --git a/docs/zh_CN/app/bala.md b/docs/zh_CN/app/bala.md
index b5b40307..1ae31ae9 100644
--- a/docs/zh_CN/app/bala.md
+++ b/docs/zh_CN/app/bala.md
@@ -39,7 +39,7 @@
**BALA 的演示 - 巡线**
-
+
**BALA 的演示 - 使用手机巡线**
diff --git a/docs/zh_CN/module/sim800.md b/docs/zh_CN/module/sim800.md
index 43677f9e..987f6cc0 100644
--- a/docs/zh_CN/module/sim800.md
+++ b/docs/zh_CN/module/sim800.md
@@ -4,8 +4,7 @@
***
-:memo:**[描述](#描述)** :electric_plug:**[原理图](#原理图)** 🛒**[购买链接](https://item.taobao.com/item.htm?spm=a1z10.3-c.w4002-1172588106.10.1c03425emPA4gi&id=559726007780)**
-
+:memo:**[描述](#描述)** :electric_plug:**[原理图](#原理图)** 🛒**[购买链接](https://item.taobao.com/item.htm?spm=a1z10.3-c.w4002-1172588106.10.1c03425emPA4gi&id=559726007780)** :clapper:**[相关视频](#相关视频)**
## 描述
@@ -75,4 +74,10 @@ Serial2.print("AT+TEST=TXLRPKT,"00 00 01 00 00 AF 80 07 02 00 00 39"");
## 原理图
-
\ No newline at end of file
+
+
+## 相关视频
+
+**SIM800L 的演示 - 拔打电话**
+
+