diff --git a/docs/assets/img/product_pics/app/BalaC/balac_01.webp b/docs/assets/img/product_pics/app/BalaC/balac_01.webp
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diff --git a/docs/en/app/balac.md b/docs/en/app/balac.md
index 035b2c0b..f4aeef9f 100644
--- a/docs/en/app/balac.md
+++ b/docs/en/app/balac.md
@@ -6,7 +6,9 @@
 
 ## Description
 
-**BalaC** is a dual wheel balancing car that can be DIY. Its base adopts STM32 series chip, on board two motor-driven ICs, and equipped with replaceable charging battery. The light-weight design and 360 ° servos allow you to use the UIFlow graphic interface to program the balancing car. StickC is included in the package. The attitude is calculated with the help of mpu6886. The real-time compensation of the servos are controlled by calculating the offset value to achieve the purpose of balancing. LEGO compatible design allows you to change different tires. If you want to learn about PID or need an interesting programming toy product, BalaC may be a good choice.
+**BalaC** is a dual wheel balancing car that can be DIY. Its base adopts STM32 series chip, on board two motor-driven ICs, and equipped with replaceable charging battery. The light-weight design and 360 ° servos allow you to use the UIFlow graphic interface to program the balancing car. StickC is included in the package. The attitude is calculated with the help of mpu6886. The real-time compensation of the servos are controlled by calculating the offset value to achieve the purpose of balancing. LEGO compatible design allows you to change different tires. If you want to learn about PID or need an interesting programming toy product, BalaC may be a good choice
+
+**At present, there is no program out of the factory, PID code needs to be written by yourself.**
 
 ## Product Features
 
@@ -100,7 +102,7 @@ Click here to download [examples](https://github.com/m5stack/M5-ProductExampleCo
 
 ### UIFlow
 
-Click here to download [UIFlow](https://github.com/m5stack/M5-ProductExampleCodes/tree/master/App/BalaC/UIFlow)
+(Not actual code for reference only) Click here to download [UIFlow](https://github.com/m5stack/M5-ProductExampleCodes/tree/master/App/BalaC/UIFlow)
 
 <img src="assets/img/product_pics/app/BalaC/balac_05.webp">
 
@@ -110,13 +112,11 @@ Click here to download [UIFlow](https://github.com/m5stack/M5-ProductExampleCode
 <video class="video_size" controls>
     <source src="https://m5stack.oss-cn-shenzhen.aliyuncs.com/video/Product_example_video/App/BalaC.mp4" type="video/mp4">
 </video>
-<script>
-
 
 
 <script>
 
-   var purchase_link = 'https://m5stack.com/collections/m5-core/products/balac';
+   var purchase_link = 'https://m5stack.com/collections/all/products/bala-c-esp32-development-mini-self-balancing-car';
 
    var quickstart_link = '';
 
diff --git a/docs/en/atom_base/atomic.md b/docs/en/atom_base/atomic.md
index 6539b503..f610a319 100644
--- a/docs/en/atom_base/atomic.md
+++ b/docs/en/atom_base/atomic.md
@@ -33,6 +33,8 @@
 - DIY node controller
 - Peripheral connection
 
+<img src="assets/img/product_pics/atom_base/atomic/ATOMIC.gif" width = 30%>
+
 ## Specification
 
 <table class="table-1">
@@ -67,7 +69,7 @@
 
 <script>
 
-   var purchase_link = 'https://m5stack.com/collections/m5-core/products/atomic-esp32-development-kit';
+   var purchase_link = 'https://m5stack.com/collections/all/products/atomic-proto-kit';
 
    var quickstart_link = '';
 
diff --git a/docs/en/unit/envII.md b/docs/en/unit/envII.md
index 77c5eb72..b420d26c 100644
--- a/docs/en/unit/envII.md
+++ b/docs/en/unit/envII.md
@@ -73,6 +73,36 @@ Supporting I2C interface, SHT30 is a digital temperature and humidity sensor wit
      </tbody>
 </table>
 
+
+## Comparison between SHT30 and DHT12
+
+<table class="table-1">
+    <thead>
+    <tr>
+        <th>/</th>
+        <th>SHT30</th>
+        <th>DHT12</th>
+    </tr>
+    </thead>
+    <tbody>
+        <tr>
+            <td>Max temperature measuring range</td>
+            <td>-40 ~ 120 ℃</td>
+            <td>-20 ~ 60 ℃</td>
+        </tr>
+        <tr>
+            <td>Typical temperature resolution</td>
+            <td>0 ~ 60 ℃/±0.2℃</td>
+            <td>±0.2℃</td>
+        </tr>
+        <tr>
+            <td>Humidity measuring range/resolution</td>
+            <td>10 ~ 90 %RH / ±2%</td>
+            <td>20 ~ 95 %RH/0.1%</td>
+        </tr>
+     </tbody>
+</table>
+
 <!--
 <table>
    <tr style="font-weight:bold">
@@ -182,7 +212,7 @@ If you want the complete code, please click [here](https://github.com/m5stack/M5
 
 <script>
 
-   var purchase_link = 'https://m5stack.com/collections/m5-unit/products/mini-env-sensor-unit';
+   var purchase_link = 'https://m5stack.com/collections/all/products/env-ii-unit';
 
    anchor_search(purchase_link);
    scrollFunc();
diff --git a/docs/zh_CN/app/balac.md b/docs/zh_CN/app/balac.md
index b7b2b9bf..128e4b68 100644
--- a/docs/zh_CN/app/balac.md
+++ b/docs/zh_CN/app/balac.md
@@ -8,6 +8,8 @@
 
 **BalaC** 是一款可以DIY的双轮平衡车，其底座采用STM32系列主控，板载2颗电机驱动IC，带有电源指示灯，配备可更换的充电电池。轻巧的设计以及360°舵机的驱动形式，让你可以利用UIFlow图形界面就能写出平衡程序。套装内含有StickC，借助内置的MPU6886进行姿态解算，通过计算偏移值控制舵机实时补偿，达到平衡的目的。兼容乐高的设计可以让你更换不同的轮胎，如果你想学习PID方面的相关内容，或者需要一款有趣的编程玩具产品，那么BalaC也许是不错的选择。
 
+**目前出厂无任何程序，PID代码需要自行编写**
+
 ## 产品特性
 
 - 基于ESP32+STM32
@@ -100,7 +102,7 @@ Click here to download [examples](https://github.com/m5stack/M5-ProductExampleCo
 
 ### UIFlow
 
-Click here to download [UIFlow](https://github.com/m5stack/M5-ProductExampleCodes/tree/master/App/BalaC/UIFlow)
+点击此处下载代码（仅供参考，不可直接使用） [UIFlow](https://github.com/m5stack/M5-ProductExampleCodes/tree/master/App/BalaC/UIFlow)
 
 <img src="assets/img/product_pics/app/BalaC/balac_05.webp">
 
@@ -109,9 +111,10 @@ Click here to download [UIFlow](https://github.com/m5stack/M5-ProductExampleCode
 <video class="video_size" controls>
     <source src="https://m5stack.oss-cn-shenzhen.aliyuncs.com/video/Product_example_video/App/BalaC.mp4" type="video/mp4">
 </video>
+
 <script>
 
-   var purchase_link = 'https://m5stack.com/collections/m5-core/products/balac';
+   var purchase_link = 'https://m5stack.com/collections/all/products/bala-c-esp32-development-mini-self-balancing-car';
 
    var quickstart_link = '';
 
diff --git a/docs/zh_CN/atom_base/atomic.md b/docs/zh_CN/atom_base/atomic.md
index eed163e7..29299bb3 100644
--- a/docs/zh_CN/atom_base/atomic.md
+++ b/docs/zh_CN/atom_base/atomic.md
@@ -33,6 +33,7 @@
 - DIY节点控制器
 - 外设连接
 
+<img src="assets/img/product_pics/atom_base/atomic/ATOMIC.gif" width = 30%>
 
 ## 规格参数
 
@@ -66,7 +67,7 @@
 
 <script>
 
-   var purchase_link = 'https://m5stack.com/collections/m5-core/products/atomic';
+   var purchase_link = 'https://m5stack.com/collections/all/products/atomic-proto-kit';
 
 
    var quickstart_link = '';
diff --git a/docs/zh_CN/unit/envII.md b/docs/zh_CN/unit/envII.md
index 2e480711..b53ff0ac 100644
--- a/docs/zh_CN/unit/envII.md
+++ b/docs/zh_CN/unit/envII.md
@@ -77,6 +77,35 @@
      </tbody>
 </table>
 
+## SHT30与DHT12对比
+
+<table class="table-1">
+    <thead>
+    <tr>
+        <th>/</th>
+        <th>SHT30</th>
+        <th>DHT12</th>
+    </tr>
+    </thead>
+    <tbody>
+        <tr>
+            <td>最大温度测量范围</td>
+            <td>-40 ~ 120 ℃</td>
+            <td>-20 ~ 60 ℃</td>
+        </tr>
+        <tr>
+            <td>温度测量误差</td>
+            <td>0 ~ 60 ℃/±0.2℃</td>
+            <td>±0.2℃</td>
+        </tr>
+        <tr>
+            <td>湿度测量范围/误差</td>
+            <td>10 ~ 90 %RH / ±2%</td>
+            <td>20 ~ 95 %RH/0.1%</td>
+        </tr>
+     </tbody>
+</table>
+
 ## EasyLoader
 
 >EasyLoader是一个简洁快速的程序烧录器，其内置了一个产品相关的案例程序，通过简单步骤将其烧录至主控，即可进行一系列的功能验证.**(程序烧录前，请根据设备类型安装相应驱动程序. M5Core型主机[请点击此处查看CP210X驱动安装教程](zh_CN/arduino/arduino_development?id=安装串口驱动)，M5StickC/V/T/ATOM系列可免驱动使用)**
@@ -144,7 +173,7 @@
 
 <script>
 
-   var purchase_link = 'https://m5stack.com/collections/m5-unit/products/mini-env2-sensor-unit';
+   var purchase_link = 'https://m5stack.com/collections/all/products/env-ii-unit';
 
    anchor_search(purchase_link);
    scrollFunc();