diff --git a/docs/en/base/core_bottom.md b/docs/en/base/core_bottom.md
index 919f8ca1..042f5441 100644
--- a/docs/en/base/core_bottom.md
+++ b/docs/en/base/core_bottom.md
@@ -16,7 +16,7 @@
 
 **M-Bus**
 
-<img src="assets/img/product_pics/core/M-BUS.jpg" alt="M_BUS"  width="60%" height="36%">
+<img src="assets/img/product_pics/core/M-BUS.png" alt="M_BUS"  width="60%" height="36%">
 
 <!-- <table>
  <tr><td>LINE 0</td><td>GND</td><td>GND</td><td>GND</td><td>GPIO26</td><td>GPIO2</td></tr>
diff --git a/docs/en/base/m5go_bottom.md b/docs/en/base/m5go_bottom.md
index 3dca2f12..dd1bdab4 100644
--- a/docs/en/base/m5go_bottom.md
+++ b/docs/en/base/m5go_bottom.md
@@ -53,7 +53,7 @@ M5GO Base is composed of battery(600mAh), M-Bus interface, charging indicator(re
 
 **M-Bus**
 
-<img src="assets/img/product_pics/core/M-BUS.jpg" alt="M_BUS">
+<img src="assets/img/product_pics/core/M-BUS.png" alt="M_BUS">
 
 ## Related Link
 
diff --git a/docs/en/base/m5go_rfid.md b/docs/en/base/m5go_rfid.md
index 66026ca6..f45333cf 100644
--- a/docs/en/base/m5go_rfid.md
+++ b/docs/en/base/m5go_rfid.md
@@ -67,7 +67,7 @@ M5GO Base is composed of battery(330mAh), M-Bus interface, charging indicator(re
 
 **M-Bus**
 
-<img src="assets/img/product_pics/core/M-BUS.jpg" alt="M_BUS">
+<img src="assets/img/product_pics/core/M-BUS.png" alt="M_BUS">
 
 
 ## Related Link
diff --git a/docs/ja/base/m5go_bottom.md b/docs/ja/base/m5go_bottom.md
index 2f9675a9..d2e34cfe 100644
--- a/docs/ja/base/m5go_bottom.md
+++ b/docs/ja/base/m5go_bottom.md
@@ -56,7 +56,7 @@ M5GO BOTTOM ベースは、600mAhバッテリ、M-BUSインターフェース、
 **M-Bus**
 
 <figure>
-  <img src="assets/img/product_pics/core/M-BUS.jpg" alt="M_BUS" width="500" height="500">
+  <img src="assets/img/product_pics/core/M-BUS.png" alt="M_BUS" width="500" height="500">
 </figure>
 
 ## 関連リンク
diff --git a/docs/ja/base/m5go_rfid.md b/docs/ja/base/m5go_rfid.md
index 0db30e6c..1a8518b9 100644
--- a/docs/ja/base/m5go_rfid.md
+++ b/docs/ja/base/m5go_rfid.md
@@ -67,7 +67,7 @@ M5GO BOTTOM ベースは、600mAhバッテリ、M-BUSインターフェース、
 
 **M-Bus**
 
-<img src="assets/img/product_pics/core/M-BUS.jpg" alt="M_BUS">
+<img src="assets/img/product_pics/core/M-BUS.png" alt="M_BUS">
 
 ## 関連リンク
 
diff --git a/docs/ja/base/rfid_base.md b/docs/ja/base/rfid_base.md
index b88f777b..fc17308b 100644
--- a/docs/ja/base/rfid_base.md
+++ b/docs/ja/base/rfid_base.md
@@ -65,7 +65,7 @@ M5GO底座在充电过程中，红色LED闪烁，充满了常亮。
 **M-Bus**
 
 <figure>
-  <img src="assets/img/product_pics/core/M-BUS.jpg" alt="M_BUS" width="500" height="500">
+  <img src="assets/img/product_pics/core/M-BUS.png" alt="M_BUS" width="500" height="500">
 </figure>
 
 ## 相关链接
diff --git a/docs/zh_CN/base/core_bottom.md b/docs/zh_CN/base/core_bottom.md
index 6c41d35d..0fd05876 100644
--- a/docs/zh_CN/base/core_bottom.md
+++ b/docs/zh_CN/base/core_bottom.md
@@ -16,7 +16,7 @@
 
 **M-Bus**
 
-<img src="assets/img/product_pics/core/M-BUS.jpg" alt="M_BUS"  width="60%" height="36%">
+<img src="assets/img/product_pics/core/M-BUS.png" alt="M_BUS"  width="60%" height="36%">
 
 <!-- <table>
  <tr><td>LINE 0</td><td>GND</td><td>GND</td><td>GND</td><td>GPIO26</td><td>GPIO2</td></tr>
diff --git a/docs/zh_CN/base/m5go_bottom.md b/docs/zh_CN/base/m5go_bottom.md
index c7d1f015..fbd66f69 100644
--- a/docs/zh_CN/base/m5go_bottom.md
+++ b/docs/zh_CN/base/m5go_bottom.md
@@ -53,7 +53,7 @@ M5GO底座由600mAh的电池、M-Bus总线接口、麦克风、红色的充电
 
 **M-Bus**
 
-<img src="assets/img/product_pics/core/M-BUS.jpg" alt="M_BUS">
+<img src="assets/img/product_pics/core/M-BUS.png" alt="M_BUS">
 
 
 ## 相关链接
diff --git a/docs/zh_CN/base/m5go_rfid.md b/docs/zh_CN/base/m5go_rfid.md
index 9483d635..6ed21810 100644
--- a/docs/zh_CN/base/m5go_rfid.md
+++ b/docs/zh_CN/base/m5go_rfid.md
@@ -67,7 +67,7 @@ M5GO 底座由 370mAh 的电池(充满 3.7V)、M-Bus 总线接口、麦克风、
 
 **M-Bus**
 
-<img src="assets/img/product_pics/core/M-BUS.jpg" alt="M_BUS">
+<img src="assets/img/product_pics/core/M-BUS.png" alt="M_BUS">
 
 
 ## 相关链接
diff --git a/docs/zh_CN/base/plc_base.md b/docs/zh_CN/base/plc_base.md
index 0b63b3aa..a46421b2 100644
--- a/docs/zh_CN/base/plc_base.md
+++ b/docs/zh_CN/base/plc_base.md
@@ -1,12 +1,12 @@
-# PLC-Base
+# PLC 底座
 
 <img src="assets/img/product_pics/module/module_plc_01.png" width="30%" height="30%"> <img src="assets/img/product_pics/module/module_plc_02.png" width="30%" height="30%">
 
 ***
 
-:memo:**[Description](#Description)**&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;:octocat:**[Example](#Example)**&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;:electric_plug:**[Schematic](#Schematic)**&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;🛒**[Purchase](https://www.aliexpress.com/store/product/M5Stack-PLC-Proto-Industrial-Board-Module-Contains-RS485-ACS712-5B-Programmable-Logic-Controller-Relay-with-Magnet/3226069_32874916056.html?spm=2114.12010615.8148356.2.4c5b68a1WZ8sjd)**
+:memo:**[描述](#描述)**&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;:octocat:**[例程](#例程)**&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;:electric_plug:**[原理图](#原理图)**&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;🛒**[购买链接](https://item.taobao.com/item.htm?spm=a1z10.3-c.w4002-1172588106.9.4f73425ewv8Jgu&id=569322040719)**
 
-## Description
+## 描述
 
 The M5Stack PLC Module is a prototye industrial board, including RS484
 adapter and electricity meter module.
@@ -14,39 +14,39 @@ adapter and electricity meter module.
 With DC9~24V power input, PLC-Proto motherboard reserved 6Pin or 4Pin
 relay output, digital input, communication interface etc.
 
-## Feature
+## 特性
 
 -  Free DIY
 -  Programmable Logic Controller
 -  Individual package weight: 0.1kg (0.22lb.)
 -  Package size: 5cm \* 5cm \* 5cm (1.97in \* 1.97in \* 1.97in)
 
-## Include
+## 包含
 
--  1x PLC-Proto Broad
--  1x RS485 module
--  1x PLC Plastic Enclosure
--  1x Slide Guide
--  1x Magnet
--  1x 6 Pin 3.96 Pitch Terminal
--  1x 4 Pin 3.96 Pitch Terminal
--  3x Hex Key
--  7x Electrical Terminal
+-  1x PLC-Proto 板
+-  1x RS485 模块
+-  1x PLC 塑料外壳
+-  1x 导轨固定件
+-  1x 磁铁
+-  1x 6 Pin 3.96H 接线端子
+-  1x 4 Pin 3.96H 接线端子
+-  3x 六角扳手
+-  7x 螺丝（三种型号：M2x4，M3x6，M3x18）
 -  1x Sticker
 
-## Applications
+## 应用
 
 -  Programmable Logic Controller
 -  Programmable Motion Controller
 -  Digital Operation Processor
 -  Strong Electric Controller
 
-## Related Link
+## 相关链接
 
-- **[Offical Video](https://www.youtube.com/channel/UCozgFVglWYQXbvTmGyS739w)**
+- **[官方频道视频](https://i.youku.com/i/UNjE1ODA2MzE0OA==?spm=a2hzp.8253869.0.0)**
 
-- **[Forum](http://forum.m5stack.com/)**
+- **[官方论坛](http://forum.m5stack.com/)**
 
-## Schematic
+## 原理图
 
 <img src="assets/img/product_pics/base/plc_sch.png">
\ No newline at end of file