Cast out !cn rules from cn lists (#3198)

* Cast out !cn rules from cn lists

* Docs: add notice about !cn rules in cn lists

README.md

@@ -11,6 +11,14 @@ This project is not opinionated. In other words, it does NOT endorse, claim or i
 - **dlc.dat**：[https://github.com/v2fly/domain-list-community/releases/latest/download/dlc.dat](https://github.com/v2fly/domain-list-community/releases/latest/download/dlc.dat)
 - **dlc.dat.sha256sum**：[https://github.com/v2fly/domain-list-community/releases/latest/download/dlc.dat.sha256sum](https://github.com/v2fly/domain-list-community/releases/latest/download/dlc.dat.sha256sum)
 
+## Notice
+
+Rules with `@!cn` attribute has been cast out from cn lists. `geosite:geolocation-cn@!cn` is no longer available.
+
+Check [#390](https://github.com/v2fly/domain-list-community/issues/390), [#3119](https://github.com/v2fly/domain-list-community/pull/3119) and [#3198](https://github.com/v2fly/domain-list-community/pull/3198) for more information.
+
+Please report if you have any problems or questions.
+
 ## Usage example
 
 Each file in the `data` directory can be used as a rule in this format: `geosite:filename`.