diff --git a/docs/Application_guide/en/sidebar.yaml b/docs/Application_guide/en/sidebar.yaml
index b35ce4f0cf83ee00679326c7862929005aee0ceb..c79c8ea52dcc7017a1a351df12b7f67fa17afc4d 100644
--- a/docs/Application_guide/en/sidebar.yaml
+++ b/docs/Application_guide/en/sidebar.yaml
@@ -262,6 +262,20 @@ items:
 -   label: Product Solution
     file: solutions/README.md
     items:
+    -   label: DTU based on EG912U Solution
+        file: solutions/DTU-EG912U/README.md
+        items:
+        -   label: Development resources summary
+            file: solutions/DTU-EG912U/dev_resources.md
+        -   label: quick start
+            file: solutions/DTU-EG912U/quick_start.md
+            items:
+            -   label: Device development based on TCP protocol
+                file: solutions/DTU-EG912U/tcp_demo.md
+            -   label: Device development based on the MQTT protocol
+                file: solutions/DTU-EG912U/mqtt_demo.md
+        -   label: software design
+            file: solutions/DTU-EG912U/software_design.md
     -   label: DTU Solution
         file: solutions/DTU/README.md
     -   label: Smart Agriculture Central Control Panel
@@ -272,6 +286,7 @@ items:
         file: solutions/electricity-meter/README.md
     -   label: Tracker Solution
         file: solutions/tracker/README.md
+    items:
 -   label: HeliosSDK
     file: helios-sdk/README.md
     items:
diff --git a/docs/Application_guide/en/solutions/DTU-EG912U/mqtt_demo.md b/docs/Application_guide/en/solutions/DTU-EG912U/mqtt_demo.md
index 76edd01f28944d258803b16a32e20a8d2f277c38..16bf2ce83e42f429b8305e66675df4369b421d9d 100644
--- a/docs/Application_guide/en/solutions/DTU-EG912U/mqtt_demo.md
+++ b/docs/Application_guide/en/solutions/DTU-EG912U/mqtt_demo.md
@@ -109,13 +109,13 @@ Download and install the **QPYCom** tool and use it to download scripts to the Q
 
 ## Service debugging
 
-**View REPL interface logs **
+**View REPL interface logs**
 
 After the program is run, you can see the log output in the REPL interaction page as shown in the following figure. There are two threads in the DTU service to process data, one is used to detect and read serial port data and forward the data to the cloud, and the other is to detect the cloud downlink data to the serial port, as shown in the following figure.
 
 ![](../../media/solutions/DTU-EG912U/repl_logs.png)
 
-**Uplink transparent transmission **
+**Uplink transparent transmission**
 
 The serial debugging tool is used to simulate the mcu to send uplink data to the module.
 
@@ -144,10 +144,6 @@ The cloud sends downlink data.
 
 ![](../../media/solutions/DTU-EG912U/cloud_down.png)
 
-xxxxxxxxxx git clone https://github.com/QuecPython/solution-simple-DTUcd solution-simple-DTUshell
-
- git clone https://github.com/QuecPython/solution-simple-DTUcd solution-simple-DTUshell
-
 Using QCOM to observe serial debugging tool to simulate mcu receiving module downlink data.
 
 ![](../../media/solutions/DTU-EG912U/qcom_down.png)
diff --git a/docs/Application_guide/en/solutions/DTU-EG912U/tcp_demo.md b/docs/Application_guide/en/solutions/DTU-EG912U/tcp_demo.md
index a3490bbc8b8af06437b4eeab78b2a437655a9353..d1694b537bc6681604bb3fc7b95154f3e3958163 100644
--- a/docs/Application_guide/en/solutions/DTU-EG912U/tcp_demo.md
+++ b/docs/Application_guide/en/solutions/DTU-EG912U/tcp_demo.md
@@ -82,7 +82,7 @@ The complete profile template is as follows：
 }
 ```
 
-参数说明：
+Parameter description:
 
 - `system_config.config`: Specifies the type of private cloud currently in use. tcp and mqtt are currently supported.
 - `mqtt_private_cloud_config`: MQTT private cloud configuration.