diff --git a/documentation20/cn/08.connector/docs.md b/documentation20/cn/08.connector/docs.md
index 45395c6f45d140e1185235baeeaef96db4ad36b8..f132ff979df39cd36cd554a6e83ffbd950ef9bb8 100644
--- a/documentation20/cn/08.connector/docs.md
+++ b/documentation20/cn/08.connector/docs.md
@@ -64,7 +64,10 @@ TDengine提供了丰富的应用程序开发接口，其中包括C/C++、Java、
 
 编辑taos.cfg文件(默认路径/etc/taos/taos.cfg)，将firstEP修改为TDengine服务器的End Point，例如：h1.taos.com:6030
 
-**提示： 如本机没有部署TDengine服务，仅安装了应用驱动，则taos.cfg中仅需配置firstEP，无需配置FQDN。**
+**提示： **
+
+1. **如本机没有部署TDengine服务，仅安装了应用驱动，则taos.cfg中仅需配置firstEP，无需配置FQDN。**
+2. **为防止与服务器端连接时出现“unable to resolve FQDN”错误，建议确认客户端的hosts文件已经配置正确的FQDN值。**
 
 **Windows x64/x86**
 
@@ -96,7 +99,7 @@ TDengine提供了丰富的应用程序开发接口，其中包括C/C++、Java、
 **提示：** 
 
 1. **如利用FQDN连接服务器，必须确认本机网络环境DNS已配置好，或在hosts文件中添加FQDN寻址记录，如编辑C:\Windows\system32\drivers\etc\hosts，添加如下的记录：`192.168.1.99  h1.taos.com` **
-2．**卸载：运行unins000.exe可卸载TDengine应用驱动。**
+2. **卸载：运行unins000.exe可卸载TDengine应用驱动。**
 
 ### 安装验证
 
diff --git a/documentation20/en/08.connector/docs.md b/documentation20/en/08.connector/docs.md
index c111a47450356e81ed1ad1f03192c84b0e471ced..a0126ceb6455249bf24e60783221cef7142890af 100644
--- a/documentation20/en/08.connector/docs.md
+++ b/documentation20/en/08.connector/docs.md
@@ -66,7 +66,11 @@ Run install_client.sh to install.
 
 Edit the taos.cfg file (default path/etc/taos/taos.cfg) and change firstEP to End Point of the TDengine server, for example: [h1.taos.com](http://h1.taos.com/):6030.
 
-**Tip: If no TDengine service deployed in this machine, but only the application driver is installed, only firstEP needs to be configured in taos.cfg, and FQDN does not.**
+**Tip: **
+
+**1. If no TDengine service deployed in this machine, but only the application driver is installed, only firstEP needs to be configured in taos.cfg, and FQDN does not.**
+
+**2. To prevent “unable to resolve FQDN” error when connecting to the server, ensure that the hosts file of the client has the correct FQDN value.**
 
 **Windows x64/x86**