From 4a002fb100f18742e1099523882db0826c703bde Mon Sep 17 00:00:00 2001
From: Littlegnal <8847263+littleGnAl@users.noreply.github.com>
Date: Thu, 15 Sep 2022 15:05:48 +0800
Subject: [PATCH] Update README.md

---
 README.md | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/README.md b/README.md
index b30d5ac93..da10d7507 100644
--- a/README.md
+++ b/README.md
@@ -16,6 +16,9 @@
 
 Agora.io provides building blocks for you to add real-time voice and video communications through a simple and powerful SDK. You can integrate the Agora SDK to enable real-time communications in your own application quickly.
 
+## NOTE
+The `main` branch is major update base on the Agora Native SDK 4.x, which introduces some break changes. If you want to get the legacy version(the version < 6.0.0), please visit the [master](https://github.com/AgoraIO-Extensions/Agora-Flutter-SDK/tree/master) branch for reference.
+
 ## Usage
 
 To use this plugin, please add `agora_rtc_engine` as a dependency to