diff --git a/README.md b/README.md
index c2f6400c..c77732e8 100644
--- a/README.md
+++ b/README.md
@@ -70,3 +70,22 @@ We are trying to rewrite the multilingual architecture of the website to make it
 ```
 
 If you don’t understand how to modify it, please feel free to [Contact Us](https://one-among.us/about/).
+
+## Banner and other tagged data
+
+Markup data such as banner can be used in documents. The format is as follows:
+
+`[[ {/*JSON*/} ]]`
+
+The internal JSON schema is as follows:
+
+* `type`: The type of tagged data, can be `banner`
+* `icon`: The url of the icon. svg cannot be used.
+* `title`: Title of item.
+* `text`: Text of item.
+
+### Example
+
+```json
+[[ {"type":"banner", "icon":"https://data.one-among.us/people/shi_Yumiaoya/photos/profile.jpg","title":"Some content of this entry doesn’t correspond to fact","text":"You are probably keeping track of an ongoing event, if you feel uncomfortable or stressed, we suggest that you pause browsing the relevant topics."} ]]
+```