diff --git a/packages/connector-smtp/README.md b/packages/connector-smtp/README.md
index acf5183e8..9f599efd4 100644
--- a/packages/connector-smtp/README.md
+++ b/packages/connector-smtp/README.md
@@ -96,7 +96,8 @@ After going through the guide, your connector JSON should look like this:
 }
 ```
 
-> **Note**
+> ℹ️ **Note**
+>
 > Only one sample template is provided in the previous cases to keep things simple. You should add more templates for other use cases.
 > You should change values wrapped with "<" and ">" according to your SendGrid or Aliyun account settings and choose to keep other fields w/o "<" and ">".
 
diff --git a/packages/connector-twilio-sms/README.md b/packages/connector-twilio-sms/README.md
index fb7283dd9..927cdc2c9 100644
--- a/packages/connector-twilio-sms/README.md
+++ b/packages/connector-twilio-sms/README.md
@@ -17,7 +17,8 @@ Once we have a valid number claimed, nav to the _Messaging_ -> **_Services_**. C
 Give a friendly service name and choose **_Notify my users_** as our service purpose.
 Following the next step, choose `Phone Number` as _Sender Type_, and link the phone number we just claimed to this service.
 
-> **Note**
+> ℹ️ **Note**
+>
 > Each phone number can only be linked with one messaging service.
 
 ## Get account credentials
diff --git a/packages/connector-wechat-native/README.md b/packages/connector-wechat-native/README.md
index 7540771a5..c8c5c3dfc 100644
--- a/packages/connector-wechat-native/README.md
+++ b/packages/connector-wechat-native/README.md
@@ -101,7 +101,7 @@ Check "Android app" (Android 应用).
 
 Fill out _Application Signing Signature_ (应用签名) and _Application Package Name_ (应用包名).
 
-> **Note**
+> ℹ️ **Note**
 > 
 > You need to sign your app to get a signature. Refer to the [Sign your app](https://developer.android.com/studio/publish/app-signing) for more info. 
 
@@ -348,7 +348,8 @@ Once WeChat native connector is enabled, you can build and run your app to see i
 
 填写「应用签名」和「应用包名」。
 
-> **Note**
+> ℹ️ **Note**
+> 
 > 你需要对你的应用签名并填写 signature。参见 [Sign your app](https://developer.android.com/studio/publish/app-signing) 以了解更多。
 
 在完成签名后，你可以执行 `signingReport` 任务来获取 signature。