diff --git a/docs/FAQ/zh/Format_String/Format_String.md b/docs/FAQ/zh/Format_String/Format_String.md
index cab62ec1c2d02028a4034736f56c5363522cb0b0..f845f3382200a8a119a497d2d0e2afb36a182f2f 100644
--- a/docs/FAQ/zh/Format_String/Format_String.md
+++ b/docs/FAQ/zh/Format_String/Format_String.md
@@ -1,4 +1,8 @@
-# Format String
+## 修订历史
+
+| 版本 | 日期      | 作者  | 变更表述                                                     |
+| ---- | --------- | ----- | ------------------------------------------------------------ |
+| 1.0  | 2021-4-07 | David | 首次编写，包括位运算、字符串与十六进制转换、以及Struct的说明 |
 
 对于字符串与十六进制之间的转换需求，特编写这篇文档，详细介绍相关知识
 
@@ -73,3 +77,49 @@
 
 ## 字符串与十六进制
 
+python客户端与服务端（c程序）进行通讯，需接收服务端发来的16进制码流，并对16进制数据进行解码，得到相应字段的数据，并可以将数据打包成对应格式的码流发送给服务端，多字节整数传输采用网络字节序。此处介绍一下字符串转换成十六进制的方法：
+
+```python
+str_test = 'Quectel build a smarter world'
+def str_to_hex(s):
+    list_hex = ' '.join([hex(ord(c)) for c in s]).split()
+    list = [int(i,16) for i in list_hex]
+    bytearr = bytearray(list)
+    return bytearr
+hex_test = str_to_hex(str_test)
+```
+
+下面使用EC600SCNLB模组做个简单的实验
+
+​	1.编写如下代码并命名为str_hex_test.py。
+
+```python
+from machine import UART
+uart0 = UART(UART.UART0, 115200, 8, 0, 1, 0)
+str_test = 'Quectel build a smarter world'
+def str_to_hex(s):
+    list_hex = ' '.join([hex(ord(c)) for c in s]).split()
+    list = [int(i,16) for i in list_hex]
+    bytearr = bytearray(list)
+    return bytearr
+hex_test = str_to_hex(str_test)
+uart0.write(hex_test)
+```
+
+​	2.下载上述文件到模组中运行，并打开串口调试工具（此处使用UartAssist）
+
+<img src="media/file_download.png" alt="image-20210407143228884" style="zoom:50%;" />
+
+<img src="media/UartAssist.png" alt="image-20210407144219267" style="zoom: 67%;" />
+
+3.运行程序，在串口工具中查看结果
+
+<img src="media/str_hex_result.png" alt="image-20210407144126291" style="zoom: 50%;" />
+
+**Tips：**
+
+如果使用ASCII接收的话，就会显示字符串形式
+
+​	4.对于模组的串口接收：无论串口工具发送ASCII或者HEX数据，串口读取都是bytes型数据
+
+![image-20210407151559820](media/uart_read.png)
\ No newline at end of file
diff --git a/docs/FAQ/zh/Format_String/media/UartAssist.png b/docs/FAQ/zh/Format_String/media/UartAssist.png
new file mode 100644
index 0000000000000000000000000000000000000000..95d51c3d8dd3f9035688e5ac945519459011680c
Binary files /dev/null and b/docs/FAQ/zh/Format_String/media/UartAssist.png differ
diff --git a/docs/FAQ/zh/Format_String/media/file_download.png b/docs/FAQ/zh/Format_String/media/file_download.png
new file mode 100644
index 0000000000000000000000000000000000000000..ae3d1ab20339489871623fa38631d5efd5af0a2b
Binary files /dev/null and b/docs/FAQ/zh/Format_String/media/file_download.png differ
diff --git a/docs/FAQ/zh/Format_String/media/str_hex_result.png b/docs/FAQ/zh/Format_String/media/str_hex_result.png
new file mode 100644
index 0000000000000000000000000000000000000000..41442a593cd957cf457af1b69ebc9ccba27e2a2f
Binary files /dev/null and b/docs/FAQ/zh/Format_String/media/str_hex_result.png differ
diff --git a/docs/FAQ/zh/Format_String/media/uart_read.png b/docs/FAQ/zh/Format_String/media/uart_read.png
new file mode 100644
index 0000000000000000000000000000000000000000..f17f3bfd40c75334b617219016d39a22c6fe657c
Binary files /dev/null and b/docs/FAQ/zh/Format_String/media/uart_read.png differ
diff --git a/docs/Quecpython_intro/zh/Qp_Hw_EC600X/media/image-20210407143154984.png b/docs/Quecpython_intro/zh/Qp_Hw_EC600X/media/image-20210407143154984.png
new file mode 100644
index 0000000000000000000000000000000000000000..ae3d1ab20339489871623fa38631d5efd5af0a2b
Binary files /dev/null and b/docs/Quecpython_intro/zh/Qp_Hw_EC600X/media/image-20210407143154984.png differ