> Note: it's a private tag (leading dot), so it won't be displayed to visitors.
+### HTML rendering
+
+Markdown support HTML tags. For example:
+
+ > <strong>strong</strong><strike>strike</strike>
+
+Will render as:
+
+> <strong>strong</strong><strike>strike</strike>
+
+If you want to shaare HTML code, it is necessary to use inline code or code blocks.
+
+**If your shaared descriptions containing HTML tags before enabling the markdown plugin,
+enabling it might break your page.**
+
+> Note: HTML tags such as script, iframe, etc. are disabled for security reasons.
+
### Known issue
#### Redirector